PNG  IHDRX cHRMz&u0`:pQ<bKGD pHYsodtIME MeqIDATxw]Wug^Qd˶ 6`!N:!@xI~)%7%@Bh&`lnjVF29gΨ4E$|>cɚ{gk= %,a KX%,a KX%,a KX%,a KX%,a KX%,a KX%, b` ǟzeאfp]<!SJmɤY޲ڿ,%c ~ع9VH.!Ͳz&QynֺTkRR.BLHi٪:l;@(!MԴ=žI,:o&N'Kù\vRmJ雵֫AWic H@" !: Cé||]k-Ha oݜ:y F())u]aG7*JV@J415p=sZH!=!DRʯvɱh~V\}v/GKY$n]"X"}t@ xS76^[bw4dsce)2dU0 CkMa-U5tvLƀ~mlMwfGE/-]7XAƟ`׮g ewxwC4\[~7@O-Q( a*XGƒ{ ՟}$_y3tĐƤatgvێi|K=uVyrŲlLӪuܿzwk$m87k( `múcE)"@rK( z4$D; 2kW=Xb$V[Ru819קR~qloѱDyįݎ*mxw]y5e4K@ЃI0A D@"BDk_)N\8͜9dz"fK0zɿvM /.:2O{ Nb=M=7>??Zuo32 DLD@D| &+֎C #B8ַ`bOb $D#ͮҪtx]%`ES`Ru[=¾!@Od37LJ0!OIR4m]GZRJu$‡c=%~s@6SKy?CeIh:[vR@Lh | (BhAMy=݃  G"'wzn޺~8ԽSh ~T*A:xR[ܹ?X[uKL_=fDȊ؂p0}7=D$Ekq!/t.*2ʼnDbŞ}DijYaȲ(""6HA;:LzxQ‘(SQQ}*PL*fc\s `/d'QXW, e`#kPGZuŞuO{{wm[&NBTiiI0bukcA9<4@SӊH*؎4U/'2U5.(9JuDfrޱtycU%j(:RUbArLֺN)udA':uGQN"-"Is.*+k@ `Ojs@yU/ H:l;@yyTn}_yw!VkRJ4P)~y#)r,D =ě"Q]ci'%HI4ZL0"MJy 8A{ aN<8D"1#IJi >XjX֔#@>-{vN!8tRݻ^)N_╗FJEk]CT՟ YP:_|H1@ CBk]yKYp|og?*dGvzنzӴzjֺNkC~AbZƷ`.H)=!QͷVTT(| u78y֮}|[8-Vjp%2JPk[}ԉaH8Wpqhwr:vWª<}l77_~{s۴V+RCģ%WRZ\AqHifɤL36: #F:p]Bq/z{0CU6ݳEv_^k7'>sq*+kH%a`0ԣisqにtү04gVgW΂iJiS'3w.w}l6MC2uԯ|>JF5`fV5m`Y**Db1FKNttu]4ccsQNnex/87+}xaUW9y>ͯ骵G{䩓Գ3+vU}~jJ.NFRD7<aJDB1#ҳgSb,+CS?/ VG J?|?,2#M9}B)MiE+G`-wo߫V`fio(}S^4e~V4bHOYb"b#E)dda:'?}׮4繏`{7Z"uny-?ǹ;0MKx{:_pÚmFמ:F " .LFQLG)Q8qN q¯¯3wOvxDb\. BKD9_NN &L:4D{mm o^tֽ:q!ƥ}K+<"m78N< ywsard5+Š²z~mnG)=}lYݧNj'QJS{S :UYS-952?&O-:W}(!6Mk4+>A>j+i|<<|;ر^߉=HE|V#F)Emm#}/"y GII웻Jі94+v뾧xu~5C95~ūH>c@덉pʃ1/4-A2G%7>m;–Y,cyyaln" ?ƻ!ʪ<{~h~i y.zZB̃/,雋SiC/JFMmBH&&FAbϓO^tubbb_hZ{_QZ-sύodFgO(6]TJA˯#`۶ɟ( %$&+V'~hiYy>922 Wp74Zkq+Ovn錄c>8~GqܲcWꂎz@"1A.}T)uiW4="jJ2W7mU/N0gcqܗOO}?9/wìXžΏ0 >֩(V^Rh32!Hj5`;O28؇2#ݕf3 ?sJd8NJ@7O0 b־?lldщ̡&|9C.8RTWwxWy46ah嘦mh٤&l zCy!PY?: CJyв]dm4ǜҐR޻RլhX{FƯanшQI@x' ao(kUUuxW_Ñ줮[w8 FRJ(8˼)_mQ _!RJhm=!cVmm ?sFOnll6Qk}alY}; "baӌ~M0w,Ggw2W:G/k2%R,_=u`WU R.9T"v,<\Ik޽/2110Ӿxc0gyC&Ny޽JҢrV6N ``یeA16"J³+Rj*;BϜkZPJaÍ<Jyw:NP8/D$ 011z֊Ⱳ3ι֘k1V_"h!JPIΣ'ɜ* aEAd:ݺ>y<}Lp&PlRfTb1]o .2EW\ͮ]38؋rTJsǏP@芎sF\> P^+dYJLbJ C-xϐn> ι$nj,;Ǖa FU *择|h ~izť3ᤓ`K'-f tL7JK+vf2)V'-sFuB4i+m+@My=O҈0"|Yxoj,3]:cо3 $#uŘ%Y"y죯LebqtҢVzq¼X)~>4L׶m~[1_k?kxֺQ`\ |ٛY4Ѯr!)N9{56(iNq}O()Em]=F&u?$HypWUeB\k]JɩSع9 Zqg4ZĊo oMcjZBU]B\TUd34ݝ~:7ڶSUsB0Z3srx 7`:5xcx !qZA!;%͚7&P H<WL!džOb5kF)xor^aujƍ7 Ǡ8/p^(L>ὴ-B,{ۇWzֺ^k]3\EE@7>lYBȝR.oHnXO/}sB|.i@ɥDB4tcm,@ӣgdtJ!lH$_vN166L__'Z)y&kH;:,Y7=J 9cG) V\hjiE;gya~%ks_nC~Er er)muuMg2;֫R)Md) ,¶ 2-wr#F7<-BBn~_(o=KO㭇[Xv eN_SMgSҐ BS헃D%g_N:/pe -wkG*9yYSZS.9cREL !k}<4_Xs#FmҶ:7R$i,fi!~' # !6/S6y@kZkZcX)%5V4P]VGYq%H1!;e1MV<!ϐHO021Dp= HMs~~a)ަu7G^];git!Frl]H/L$=AeUvZE4P\.,xi {-~p?2b#amXAHq)MWǾI_r`S Hz&|{ +ʖ_= (YS(_g0a03M`I&'9vl?MM+m~}*xT۲(fY*V4x@29s{DaY"toGNTO+xCAO~4Ϳ;p`Ѫ:>Ҵ7K 3}+0 387x\)a"/E>qpWB=1 ¨"MP(\xp߫́A3+J] n[ʼnӼaTbZUWb={~2ooKױӰp(CS\S筐R*JغV&&"FA}J>G֐p1ٸbk7 ŘH$JoN <8s^yk_[;gy-;߉DV{c B yce% aJhDȶ 2IdйIB/^n0tNtџdcKj4϶v~- CBcgqx9= PJ) dMsjpYB] GD4RDWX +h{y`,3ꊕ$`zj*N^TP4L:Iz9~6s) Ga:?y*J~?OrMwP\](21sZUD ?ܟQ5Q%ggW6QdO+\@ ̪X'GxN @'4=ˋ+*VwN ne_|(/BDfj5(Dq<*tNt1х!MV.C0 32b#?n0pzj#!38}޴o1KovCJ`8ŗ_"]] rDUy޲@ Ȗ-;xџ'^Y`zEd?0„ DAL18IS]VGq\4o !swV7ˣι%4FѮ~}6)OgS[~Q vcYbL!wG3 7띸*E Pql8=jT\꘿I(z<[6OrR8ºC~ډ]=rNl[g|v TMTղb-o}OrP^Q]<98S¤!k)G(Vkwyqyr޽Nv`N/e p/~NAOk \I:G6]4+K;j$R:Mi #*[AȚT,ʰ,;N{HZTGMoּy) ]%dHء9Պ䠬|<45,\=[bƟ8QXeB3- &dҩ^{>/86bXmZ]]yޚN[(WAHL$YAgDKp=5GHjU&99v簪C0vygln*P)9^͞}lMuiH!̍#DoRBn9l@ xA/_v=ȺT{7Yt2N"4!YN`ae >Q<XMydEB`VU}u]嫇.%e^ánE87Mu\t`cP=AD/G)sI"@MP;)]%fH9'FNsj1pVhY&9=0pfuJ&gޤx+k:!r˭wkl03׼Ku C &ѓYt{.O.zҏ z}/tf_wEp2gvX)GN#I ݭ߽v/ .& и(ZF{e"=V!{zW`, ]+LGz"(UJp|j( #V4, 8B 0 9OkRrlɱl94)'VH9=9W|>PS['G(*I1==C<5"Pg+x'K5EMd؞Af8lG ?D FtoB[je?{k3zQ vZ;%Ɠ,]E>KZ+T/ EJxOZ1i #T<@ I}q9/t'zi(EMqw`mYkU6;[t4DPeckeM;H}_g pMww}k6#H㶏+b8雡Sxp)&C $@'b,fPߑt$RbJ'vznuS ~8='72_`{q纶|Q)Xk}cPz9p7O:'|G~8wx(a 0QCko|0ASD>Ip=4Q, d|F8RcU"/KM opKle M3#i0c%<7׿p&pZq[TR"BpqauIp$ 8~Ĩ!8Սx\ւdT>>Z40ks7 z2IQ}ItԀ<-%S⍤};zIb$I 5K}Q͙D8UguWE$Jh )cu4N tZl+[]M4k8֦Zeq֮M7uIqG 1==tLtR,ƜSrHYt&QP윯Lg' I,3@P'}'R˪e/%-Auv·ñ\> vDJzlӾNv5:|K/Jb6KI9)Zh*ZAi`?S {aiVDԲuy5W7pWeQJk֤#5&V<̺@/GH?^τZL|IJNvI:'P=Ϛt"¨=cud S Q.Ki0 !cJy;LJR;G{BJy޺[^8fK6)=yʊ+(k|&xQ2`L?Ȓ2@Mf 0C`6-%pKpm')c$׻K5[J*U[/#hH!6acB JA _|uMvDyk y)6OPYjœ50VT K}cǻP[ $:]4MEA.y)|B)cf-A?(e|lɉ#P9V)[9t.EiQPDѠ3ϴ;E:+Օ t ȥ~|_N2,ZJLt4! %ա]u {+=p.GhNcŞQI?Nd'yeh n7zi1DB)1S | S#ًZs2|Ɛy$F SxeX{7Vl.Src3E℃Q>b6G ўYCmtկ~=K0f(=LrAS GN'ɹ9<\!a`)֕y[uՍ[09` 9 +57ts6}b4{oqd+J5fa/,97J#6yν99mRWxJyѡyu_TJc`~W>l^q#Ts#2"nD1%fS)FU w{ܯ R{ ˎ󅃏џDsZSQS;LV;7 Od1&1n$ N /.q3~eNɪ]E#oM~}v֯FڦwyZ=<<>Xo稯lfMFV6p02|*=tV!c~]fa5Y^Q_WN|Vs 0ҘދU97OI'N2'8N֭fgg-}V%y]U4 峧p*91#9U kCac_AFңĪy뚇Y_AiuYyTTYЗ-(!JFLt›17uTozc. S;7A&&<ԋ5y;Ro+:' *eYJkWR[@F %SHWP 72k4 qLd'J "zB6{AC0ƁA6U.'F3:Ȅ(9ΜL;D]m8ڥ9}dU "v!;*13Rg^fJyShyy5auA?ɩGHRjo^]׽S)Fm\toy 4WQS@mE#%5ʈfFYDX ~D5Ϡ9tE9So_aU4?Ѽm%&c{n>.KW1Tlb}:j uGi(JgcYj0qn+>) %\!4{LaJso d||u//P_y7iRJ߬nHOy) l+@$($VFIQ9%EeKʈU. ia&FY̒mZ=)+qqoQn >L!qCiDB;Y<%} OgBxB!ØuG)WG9y(Ą{_yesuZmZZey'Wg#C~1Cev@0D $a@˲(.._GimA:uyw֬%;@!JkQVM_Ow:P.s\)ot- ˹"`B,e CRtaEUP<0'}r3[>?G8xU~Nqu;Wm8\RIkբ^5@k+5(By'L&'gBJ3ݶ!/㮻w҅ yqPWUg<e"Qy*167΃sJ\oz]T*UQ<\FԎ`HaNmڜ6DysCask8wP8y9``GJ9lF\G g's Nn͵MLN֪u$| /|7=]O)6s !ĴAKh]q_ap $HH'\1jB^s\|- W1:=6lJBqjY^LsPk""`]w)󭃈,(HC ?䔨Y$Sʣ{4Z+0NvQkhol6C.婧/u]FwiVjZka&%6\F*Ny#8O,22+|Db~d ~Çwc N:FuuCe&oZ(l;@ee-+Wn`44AMK➝2BRՈt7g*1gph9N) *"TF*R(#'88pm=}X]u[i7bEc|\~EMn}P瘊J)K.0i1M6=7'_\kaZ(Th{K*GJyytw"IO-PWJk)..axӝ47"89Cc7ĐBiZx 7m!fy|ϿF9CbȩV 9V-՛^pV̌ɄS#Bv4-@]Vxt-Z, &ֺ*diؠ2^VXbs֔Ìl.jQ]Y[47gj=幽ex)A0ip׳ W2[ᎇhuE^~q흙L} #-b۸oFJ_QP3r6jr+"nfzRJTUqoaۍ /$d8Mx'ݓ= OՃ| )$2mcM*cЙj}f };n YG w0Ia!1Q.oYfr]DyISaP}"dIӗթO67jqR ҊƐƈaɤGG|h;t]䗖oSv|iZqX)oalv;۩meEJ\!8=$4QU4Xo&VEĊ YS^E#d,yX_> ۘ-e\ "Wa6uLĜZi`aD9.% w~mB(02G[6y.773a7 /=o7D)$Z 66 $bY^\CuP. (x'"J60׿Y:Oi;F{w佩b+\Yi`TDWa~|VH)8q/=9!g߆2Y)?ND)%?Ǐ`k/sn:;O299yB=a[Ng 3˲N}vLNy;*?x?~L&=xyӴ~}q{qE*IQ^^ͧvü{Huu=R|>JyUlZV, B~/YF!Y\u_ݼF{_C)LD]m {H 0ihhadd nUkf3oٺCvE\)QJi+֥@tDJkB$1!Đr0XQ|q?d2) Ӣ_}qv-< FŊ߫%roppVBwü~JidY4:}L6M7f٬F "?71<2#?Jyy4뷢<_a7_=Q E=S1И/9{+93֮E{ǂw{))?maÆm(uLE#lïZ  ~d];+]h j?!|$F}*"4(v'8s<ŏUkm7^7no1w2ؗ}TrͿEk>p'8OB7d7R(A 9.*Mi^ͳ; eeUwS+C)uO@ =Sy]` }l8^ZzRXj[^iUɺ$tj))<sbDJfg=Pk_{xaKo1:-uyG0M ԃ\0Lvuy'ȱc2Ji AdyVgVh!{]/&}}ċJ#%d !+87<;qN޼Nفl|1N:8ya  8}k¾+-$4FiZYÔXk*I&'@iI99)HSh4+2G:tGhS^繿 Kتm0 вDk}֚+QT4;sC}rՅE,8CX-e~>G&'9xpW,%Fh,Ry56Y–hW-(v_,? ; qrBk4-V7HQ;ˇ^Gv1JVV%,ik;D_W!))+BoS4QsTM;gt+ndS-~:11Sgv!0qRVh!"Ȋ(̦Yl.]PQWgٳE'`%W1{ndΗBk|Ž7ʒR~,lnoa&:ü$ 3<a[CBݮwt"o\ePJ=Hz"_c^Z.#ˆ*x z̝grY]tdkP*:97YľXyBkD4N.C_[;F9`8& !AMO c `@BA& Ost\-\NX+Xp < !bj3C&QL+*&kAQ=04}cC!9~820G'PC9xa!w&bo_1 Sw"ܱ V )Yl3+ס2KoXOx]"`^WOy :3GO0g;%Yv㐫(R/r (s } u B &FeYZh0y> =2<Ϟc/ -u= c&׭,.0"g"7 6T!vl#sc>{u/Oh Bᾈ)۴74]x7 gMӒ"d]U)}" v4co[ ɡs 5Gg=XR14?5A}D "b{0$L .\4y{_fe:kVS\\O]c^W52LSBDM! C3Dhr̦RtArx4&agaN3Cf<Ԉp4~ B'"1@.b_/xQ} _߃҉/gٓ2Qkqp0շpZ2fԫYz< 4L.Cyυι1t@鎫Fe sYfsF}^ V}N<_`p)alٶ "(XEAVZ<)2},:Ir*#m_YӼ R%a||EƼIJ,,+f"96r/}0jE/)s)cjW#w'Sʯ5<66lj$a~3Kʛy 2:cZ:Yh))+a߭K::N,Q F'qB]={.]h85C9cr=}*rk?vwV렵ٸW Rs%}rNAkDv|uFLBkWY YkX מ|)1!$#3%y?pF<@<Rr0}: }\J [5FRxY<9"SQdE(Q*Qʻ)q1E0B_O24[U'],lOb ]~WjHޏTQ5Syu wq)xnw8~)c 쫬gٲߠ H% k5dƝk> kEj,0% b"vi2Wس_CuK)K{n|>t{P1򨾜j>'kEkƗBg*H%'_aY6Bn!TL&ɌOb{c`'d^{t\i^[uɐ[}q0lM˕G:‚4kb祔c^:?bpg… +37stH:0}en6x˟%/<]BL&* 5&fK9Mq)/iyqtA%kUe[ڛKN]Ě^,"`/ s[EQQm?|XJ߅92m]G.E΃ח U*Cn.j_)Tѧj̿30ڇ!A0=͜ar I3$C^-9#|pk!)?7.x9 @OO;WƝZBFU keZ75F6Tc6"ZȚs2y/1 ʵ:u4xa`C>6Rb/Yм)^=+~uRd`/|_8xbB0?Ft||Z\##|K 0>>zxv8۴吅q 8ĥ)"6>~\8:qM}#͚'ĉ#p\׶ l#bA?)|g g9|8jP(cr,BwV (WliVxxᡁ@0Okn;ɥh$_ckCgriv}>=wGzβ KkBɛ[˪ !J)h&k2%07δt}!d<9;I&0wV/ v 0<H}L&8ob%Hi|޶o&h1L|u֦y~󛱢8fٲUsւ)0oiFx2}X[zVYr_;N(w]_4B@OanC?gĦx>мgx>ΛToZoOMp>40>V Oy V9iq!4 LN,ˢu{jsz]|"R޻&'ƚ{53ўFu(<٪9:΋]B;)B>1::8;~)Yt|0(pw2N%&X,URBK)3\zz&}ax4;ǟ(tLNg{N|Ǽ\G#C9g$^\}p?556]/RP.90 k,U8/u776s ʪ_01چ|\N 0VV*3H鴃J7iI!wG_^ypl}r*jɤSR 5QN@ iZ#1ٰy;_\3\BQQ x:WJv츟ٯ$"@6 S#qe딇(/P( Dy~TOϻ<4:-+F`0||;Xl-"uw$Цi󼕝mKʩorz"mϺ$F:~E'ҐvD\y?Rr8_He@ e~O,T.(ފR*cY^m|cVR[8 JҡSm!ΆԨb)RHG{?MpqrmN>߶Y)\p,d#xۆWY*,l6]v0h15M˙MS8+EdI='LBJIH7_9{Caз*Lq,dt >+~ّeʏ?xԕ4bBAŚjﵫ!'\Ը$WNvKO}ӽmSşذqsOy?\[,d@'73'j%kOe`1.g2"e =YIzS2|zŐƄa\U,dP;jhhhaxǶ?КZ՚.q SE+XrbOu%\GتX(H,N^~]JyEZQKceTQ]VGYqnah;y$cQahT&QPZ*iZ8UQQM.qo/T\7X"u?Mttl2Xq(IoW{R^ ux*SYJ! 4S.Jy~ BROS[V|žKNɛP(L6V^|cR7i7nZW1Fd@ Ara{詑|(T*dN]Ko?s=@ |_EvF]׍kR)eBJc" MUUbY6`~V޴dJKß&~'d3i WWWWWW

F1l3 Manager

Current Directory: /usr/share/doc/python3-docs/html/library
/usr/share/doc/python3-docs/html/library/
Viewing File: /usr/share/doc/python3-docs/html/library/asyncio-stream.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>18.5.5. Streams (coroutine based API) &#8212; Python 3.6.7 documentation</title> <link rel="stylesheet" href="../_static/pydoctheme.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 3.6.7 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="18.5.6. Subprocess" href="asyncio-subprocess.html" /> <link rel="prev" title="18.5.4. Transports and protocols (callback based API)" href="asyncio-protocol.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="https://docs.python.org/3/library/asyncio-stream.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="asyncio-subprocess.html" title="18.5.6. Subprocess" accesskey="N">next</a> |</li> <li class="right" > <a href="asyncio-protocol.html" title="18.5.4. Transports and protocols (callback based API)" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> &#187;</li> <li> <a href="../index.html">3.6.7 Documentation</a> &#187; </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> &#187;</li> <li class="nav-item nav-item-2"><a href="ipc.html" >18. Interprocess Communication and Networking</a> &#187;</li> <li class="nav-item nav-item-3"><a href="asyncio.html" accesskey="U">18.5. <code class="docutils literal notranslate"><span class="pre">asyncio</span></code> — Asynchronous I/O, event loop, coroutines and tasks</a> &#187;</li> <li class="right"> <div class="inline-search" style="display: none" role="search"> <form class="inline-search" action="../search.html" method="get"> <input placeholder="Quick search" type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('.inline-search').show(0);</script> | </li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="streams-coroutine-based-api"> <span id="asyncio-streams"></span><h1>18.5.5. Streams (coroutine based API)<a class="headerlink" href="#streams-coroutine-based-api" title="Permalink to this headline">¶</a></h1> <p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.6/Lib/asyncio/streams.py">Lib/asyncio/streams.py</a></p> <div class="section" id="stream-functions"> <h2>18.5.5.1. Stream functions<a class="headerlink" href="#stream-functions" title="Permalink to this headline">¶</a></h2> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">The top-level functions in this module are meant as convenience wrappers only; there’s really nothing special there, and if they don’t do exactly what you want, feel free to copy their code.</p> </div> <dl class="function"> <dt id="asyncio.open_connection"> <em class="property">coroutine </em><code class="descclassname">asyncio.</code><code class="descname">open_connection</code><span class="sig-paren">(</span><em>host=None</em>, <em>port=None</em>, <em>*</em>, <em>loop=None</em>, <em>limit=None</em>, <em>**kwds</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.open_connection" title="Permalink to this definition">¶</a></dt> <dd><p>A wrapper for <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_connection" title="asyncio.AbstractEventLoop.create_connection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">create_connection()</span></code></a> returning a (reader, writer) pair.</p> <p>The reader returned is a <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> instance; the writer is a <a class="reference internal" href="#asyncio.StreamWriter" title="asyncio.StreamWriter"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamWriter</span></code></a> instance.</p> <p>The arguments are all the usual arguments to <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_connection" title="asyncio.AbstractEventLoop.create_connection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AbstractEventLoop.create_connection()</span></code></a> except <em>protocol_factory</em>; most common are positional host and port, with various optional keyword arguments following.</p> <p>Additional optional keyword arguments are <em>loop</em> (to set the event loop instance to use) and <em>limit</em> (to set the buffer limit passed to the <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a>).</p> <p>This function is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="function"> <dt id="asyncio.start_server"> <em class="property">coroutine </em><code class="descclassname">asyncio.</code><code class="descname">start_server</code><span class="sig-paren">(</span><em>client_connected_cb</em>, <em>host=None</em>, <em>port=None</em>, <em>*</em>, <em>loop=None</em>, <em>limit=None</em>, <em>**kwds</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.start_server" title="Permalink to this definition">¶</a></dt> <dd><p>Start a socket server, with a callback for each client connected. The return value is the same as <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_server" title="asyncio.AbstractEventLoop.create_server"><code class="xref py py-meth docutils literal notranslate"><span class="pre">create_server()</span></code></a>.</p> <p>The <em>client_connected_cb</em> parameter is called with two parameters: <em>client_reader</em>, <em>client_writer</em>. <em>client_reader</em> is a <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> object, while <em>client_writer</em> is a <a class="reference internal" href="#asyncio.StreamWriter" title="asyncio.StreamWriter"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamWriter</span></code></a> object. The <em>client_connected_cb</em> parameter can either be a plain callback function or a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine function</span></a>; if it is a coroutine function, it will be automatically converted into a <a class="reference internal" href="asyncio-task.html#asyncio.Task" title="asyncio.Task"><code class="xref py py-class docutils literal notranslate"><span class="pre">Task</span></code></a>.</p> <p>The rest of the arguments are all the usual arguments to <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_server" title="asyncio.AbstractEventLoop.create_server"><code class="xref py py-meth docutils literal notranslate"><span class="pre">create_server()</span></code></a> except <em>protocol_factory</em>; most common are positional <em>host</em> and <em>port</em>, with various optional keyword arguments following.</p> <p>Additional optional keyword arguments are <em>loop</em> (to set the event loop instance to use) and <em>limit</em> (to set the buffer limit passed to the <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a>).</p> <p>This function is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="function"> <dt id="asyncio.open_unix_connection"> <em class="property">coroutine </em><code class="descclassname">asyncio.</code><code class="descname">open_unix_connection</code><span class="sig-paren">(</span><em>path=None</em>, <em>*</em>, <em>loop=None</em>, <em>limit=None</em>, <em>**kwds</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.open_unix_connection" title="Permalink to this definition">¶</a></dt> <dd><p>A wrapper for <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_unix_connection" title="asyncio.AbstractEventLoop.create_unix_connection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">create_unix_connection()</span></code></a> returning a (reader, writer) pair.</p> <p>See <a class="reference internal" href="#asyncio.open_connection" title="asyncio.open_connection"><code class="xref py py-func docutils literal notranslate"><span class="pre">open_connection()</span></code></a> for information about return value and other details.</p> <p>This function is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> <p>Availability: UNIX.</p> </dd></dl> <dl class="function"> <dt id="asyncio.start_unix_server"> <em class="property">coroutine </em><code class="descclassname">asyncio.</code><code class="descname">start_unix_server</code><span class="sig-paren">(</span><em>client_connected_cb</em>, <em>path=None</em>, <em>*</em>, <em>loop=None</em>, <em>limit=None</em>, <em>**kwds</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.start_unix_server" title="Permalink to this definition">¶</a></dt> <dd><p>Start a UNIX Domain Socket server, with a callback for each client connected.</p> <p>See <a class="reference internal" href="#asyncio.start_server" title="asyncio.start_server"><code class="xref py py-func docutils literal notranslate"><span class="pre">start_server()</span></code></a> for information about return value and other details.</p> <p>This function is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> <p>Availability: UNIX.</p> </dd></dl> </div> <div class="section" id="streamreader"> <h2>18.5.5.2. StreamReader<a class="headerlink" href="#streamreader" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="asyncio.StreamReader"> <em class="property">class </em><code class="descclassname">asyncio.</code><code class="descname">StreamReader</code><span class="sig-paren">(</span><em>limit=_DEFAULT_LIMIT</em>, <em>loop=None</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader" title="Permalink to this definition">¶</a></dt> <dd><p>This class is <a class="reference internal" href="asyncio-dev.html#asyncio-multithreading"><span class="std std-ref">not thread safe</span></a>.</p> <p>The <em>limit</em> argument’s default value is set to _DEFAULT_LIMIT which is 2**16 (64 KiB)</p> <dl class="method"> <dt id="asyncio.StreamReader.exception"> <code class="descname">exception</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.exception" title="Permalink to this definition">¶</a></dt> <dd><p>Get the exception.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.feed_eof"> <code class="descname">feed_eof</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.feed_eof" title="Permalink to this definition">¶</a></dt> <dd><p>Acknowledge the EOF.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.feed_data"> <code class="descname">feed_data</code><span class="sig-paren">(</span><em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.feed_data" title="Permalink to this definition">¶</a></dt> <dd><p>Feed <em>data</em> bytes in the internal buffer. Any operations waiting for the data will be resumed.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.set_exception"> <code class="descname">set_exception</code><span class="sig-paren">(</span><em>exc</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.set_exception" title="Permalink to this definition">¶</a></dt> <dd><p>Set the exception.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.set_transport"> <code class="descname">set_transport</code><span class="sig-paren">(</span><em>transport</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.set_transport" title="Permalink to this definition">¶</a></dt> <dd><p>Set the transport.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.read"> <em class="property">coroutine </em><code class="descname">read</code><span class="sig-paren">(</span><em>n=-1</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.read" title="Permalink to this definition">¶</a></dt> <dd><p>Read up to <em>n</em> bytes. If <em>n</em> is not provided, or set to <code class="docutils literal notranslate"><span class="pre">-1</span></code>, read until EOF and return all read bytes.</p> <p>If the EOF was received and the internal buffer is empty, return an empty <code class="docutils literal notranslate"><span class="pre">bytes</span></code> object.</p> <p>This method is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.readline"> <em class="property">coroutine </em><code class="descname">readline</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.readline" title="Permalink to this definition">¶</a></dt> <dd><p>Read one line, where “line” is a sequence of bytes ending with <code class="docutils literal notranslate"><span class="pre">\n</span></code>.</p> <p>If EOF is received, and <code class="docutils literal notranslate"><span class="pre">\n</span></code> was not found, the method will return the partial read bytes.</p> <p>If the EOF was received and the internal buffer is empty, return an empty <code class="docutils literal notranslate"><span class="pre">bytes</span></code> object.</p> <p>This method is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.readexactly"> <em class="property">coroutine </em><code class="descname">readexactly</code><span class="sig-paren">(</span><em>n</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.readexactly" title="Permalink to this definition">¶</a></dt> <dd><p>Read exactly <em>n</em> bytes. Raise an <a class="reference internal" href="#asyncio.IncompleteReadError" title="asyncio.IncompleteReadError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">IncompleteReadError</span></code></a> if the end of the stream is reached before <em>n</em> can be read, the <a class="reference internal" href="#asyncio.IncompleteReadError.partial" title="asyncio.IncompleteReadError.partial"><code class="xref py py-attr docutils literal notranslate"><span class="pre">IncompleteReadError.partial</span></code></a> attribute of the exception contains the partial read bytes.</p> <p>This method is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.readuntil"> <em class="property">coroutine </em><code class="descname">readuntil</code><span class="sig-paren">(</span><em>separator=b'\n'</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.readuntil" title="Permalink to this definition">¶</a></dt> <dd><p>Read data from the stream until <code class="docutils literal notranslate"><span class="pre">separator</span></code> is found.</p> <p>On success, the data and separator will be removed from the internal buffer (consumed). Returned data will include the separator at the end.</p> <p>Configured stream limit is used to check result. Limit sets the maximal length of data that can be returned, not counting the separator.</p> <p>If an EOF occurs and the complete separator is still not found, an <a class="reference internal" href="#asyncio.IncompleteReadError" title="asyncio.IncompleteReadError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">IncompleteReadError</span></code></a> exception will be raised, and the internal buffer will be reset. The <a class="reference internal" href="#asyncio.IncompleteReadError.partial" title="asyncio.IncompleteReadError.partial"><code class="xref py py-attr docutils literal notranslate"><span class="pre">IncompleteReadError.partial</span></code></a> attribute may contain the separator partially.</p> <p>If the data cannot be read because of over limit, a <a class="reference internal" href="#asyncio.LimitOverrunError" title="asyncio.LimitOverrunError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">LimitOverrunError</span></code></a> exception will be raised, and the data will be left in the internal buffer, so it can be read again.</p> <div class="versionadded"> <p><span class="versionmodified">New in version 3.5.2.</span></p> </div> </dd></dl> <dl class="method"> <dt id="asyncio.StreamReader.at_eof"> <code class="descname">at_eof</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReader.at_eof" title="Permalink to this definition">¶</a></dt> <dd><p>Return <code class="docutils literal notranslate"><span class="pre">True</span></code> if the buffer is empty and <a class="reference internal" href="#asyncio.StreamReader.feed_eof" title="asyncio.StreamReader.feed_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">feed_eof()</span></code></a> was called.</p> </dd></dl> </dd></dl> </div> <div class="section" id="streamwriter"> <h2>18.5.5.3. StreamWriter<a class="headerlink" href="#streamwriter" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="asyncio.StreamWriter"> <em class="property">class </em><code class="descclassname">asyncio.</code><code class="descname">StreamWriter</code><span class="sig-paren">(</span><em>transport</em>, <em>protocol</em>, <em>reader</em>, <em>loop</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter" title="Permalink to this definition">¶</a></dt> <dd><p>Wraps a Transport.</p> <p>This exposes <a class="reference internal" href="#asyncio.StreamWriter.write" title="asyncio.StreamWriter.write"><code class="xref py py-meth docutils literal notranslate"><span class="pre">write()</span></code></a>, <a class="reference internal" href="#asyncio.StreamWriter.writelines" title="asyncio.StreamWriter.writelines"><code class="xref py py-meth docutils literal notranslate"><span class="pre">writelines()</span></code></a>, <a class="reference internal" href="#asyncio.StreamWriter.can_write_eof" title="asyncio.StreamWriter.can_write_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">can_write_eof()</span></code></a>, <a class="reference internal" href="#asyncio.StreamWriter.write_eof" title="asyncio.StreamWriter.write_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">write_eof()</span></code></a>, <a class="reference internal" href="#asyncio.StreamWriter.get_extra_info" title="asyncio.StreamWriter.get_extra_info"><code class="xref py py-meth docutils literal notranslate"><span class="pre">get_extra_info()</span></code></a> and <a class="reference internal" href="#asyncio.StreamWriter.close" title="asyncio.StreamWriter.close"><code class="xref py py-meth docutils literal notranslate"><span class="pre">close()</span></code></a>. It adds <a class="reference internal" href="#asyncio.StreamWriter.drain" title="asyncio.StreamWriter.drain"><code class="xref py py-meth docutils literal notranslate"><span class="pre">drain()</span></code></a> which returns an optional <a class="reference internal" href="asyncio-task.html#asyncio.Future" title="asyncio.Future"><code class="xref py py-class docutils literal notranslate"><span class="pre">Future</span></code></a> on which you can wait for flow control. It also adds a transport attribute which references the <code class="xref py py-class docutils literal notranslate"><span class="pre">Transport</span></code> directly.</p> <p>This class is <a class="reference internal" href="asyncio-dev.html#asyncio-multithreading"><span class="std std-ref">not thread safe</span></a>.</p> <dl class="attribute"> <dt id="asyncio.StreamWriter.transport"> <code class="descname">transport</code><a class="headerlink" href="#asyncio.StreamWriter.transport" title="Permalink to this definition">¶</a></dt> <dd><p>Transport.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.can_write_eof"> <code class="descname">can_write_eof</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.can_write_eof" title="Permalink to this definition">¶</a></dt> <dd><p>Return <a class="reference internal" href="constants.html#True" title="True"><code class="xref py py-const docutils literal notranslate"><span class="pre">True</span></code></a> if the transport supports <a class="reference internal" href="#asyncio.StreamWriter.write_eof" title="asyncio.StreamWriter.write_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">write_eof()</span></code></a>, <a class="reference internal" href="constants.html#False" title="False"><code class="xref py py-const docutils literal notranslate"><span class="pre">False</span></code></a> if not. See <a class="reference internal" href="asyncio-protocol.html#asyncio.WriteTransport.can_write_eof" title="asyncio.WriteTransport.can_write_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">WriteTransport.can_write_eof()</span></code></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.close"> <code class="descname">close</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.close" title="Permalink to this definition">¶</a></dt> <dd><p>Close the transport: see <a class="reference internal" href="asyncio-protocol.html#asyncio.BaseTransport.close" title="asyncio.BaseTransport.close"><code class="xref py py-meth docutils literal notranslate"><span class="pre">BaseTransport.close()</span></code></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.drain"> <em class="property">coroutine </em><code class="descname">drain</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.drain" title="Permalink to this definition">¶</a></dt> <dd><p>Let the write buffer of the underlying transport a chance to be flushed.</p> <p>The intended use is to write:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">w</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="k">yield from</span> <span class="n">w</span><span class="o">.</span><span class="n">drain</span><span class="p">()</span> </pre></div> </div> <p>When the size of the transport buffer reaches the high-water limit (the protocol is paused), block until the size of the buffer is drained down to the low-water limit and the protocol is resumed. When there is nothing to wait for, the yield-from continues immediately.</p> <p>Yielding from <a class="reference internal" href="#asyncio.StreamWriter.drain" title="asyncio.StreamWriter.drain"><code class="xref py py-meth docutils literal notranslate"><span class="pre">drain()</span></code></a> gives the opportunity for the loop to schedule the write operation and flush the buffer. It should especially be used when a possibly large amount of data is written to the transport, and the coroutine does not yield-from between calls to <a class="reference internal" href="#asyncio.StreamWriter.write" title="asyncio.StreamWriter.write"><code class="xref py py-meth docutils literal notranslate"><span class="pre">write()</span></code></a>.</p> <p>This method is a <a class="reference internal" href="asyncio-task.html#coroutine"><span class="std std-ref">coroutine</span></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.get_extra_info"> <code class="descname">get_extra_info</code><span class="sig-paren">(</span><em>name</em>, <em>default=None</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.get_extra_info" title="Permalink to this definition">¶</a></dt> <dd><p>Return optional transport information: see <a class="reference internal" href="asyncio-protocol.html#asyncio.BaseTransport.get_extra_info" title="asyncio.BaseTransport.get_extra_info"><code class="xref py py-meth docutils literal notranslate"><span class="pre">BaseTransport.get_extra_info()</span></code></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.write"> <code class="descname">write</code><span class="sig-paren">(</span><em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.write" title="Permalink to this definition">¶</a></dt> <dd><p>Write some <em>data</em> bytes to the transport: see <a class="reference internal" href="asyncio-protocol.html#asyncio.WriteTransport.write" title="asyncio.WriteTransport.write"><code class="xref py py-meth docutils literal notranslate"><span class="pre">WriteTransport.write()</span></code></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.writelines"> <code class="descname">writelines</code><span class="sig-paren">(</span><em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.writelines" title="Permalink to this definition">¶</a></dt> <dd><p>Write a list (or any iterable) of data bytes to the transport: see <a class="reference internal" href="asyncio-protocol.html#asyncio.WriteTransport.writelines" title="asyncio.WriteTransport.writelines"><code class="xref py py-meth docutils literal notranslate"><span class="pre">WriteTransport.writelines()</span></code></a>.</p> </dd></dl> <dl class="method"> <dt id="asyncio.StreamWriter.write_eof"> <code class="descname">write_eof</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamWriter.write_eof" title="Permalink to this definition">¶</a></dt> <dd><p>Close the write end of the transport after flushing buffered data: see <a class="reference internal" href="asyncio-protocol.html#asyncio.WriteTransport.write_eof" title="asyncio.WriteTransport.write_eof"><code class="xref py py-meth docutils literal notranslate"><span class="pre">WriteTransport.write_eof()</span></code></a>.</p> </dd></dl> </dd></dl> </div> <div class="section" id="streamreaderprotocol"> <h2>18.5.5.4. StreamReaderProtocol<a class="headerlink" href="#streamreaderprotocol" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="asyncio.StreamReaderProtocol"> <em class="property">class </em><code class="descclassname">asyncio.</code><code class="descname">StreamReaderProtocol</code><span class="sig-paren">(</span><em>stream_reader</em>, <em>client_connected_cb=None</em>, <em>loop=None</em><span class="sig-paren">)</span><a class="headerlink" href="#asyncio.StreamReaderProtocol" title="Permalink to this definition">¶</a></dt> <dd><p>Trivial helper class to adapt between <a class="reference internal" href="asyncio-protocol.html#asyncio.Protocol" title="asyncio.Protocol"><code class="xref py py-class docutils literal notranslate"><span class="pre">Protocol</span></code></a> and <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a>. Subclass of <a class="reference internal" href="asyncio-protocol.html#asyncio.Protocol" title="asyncio.Protocol"><code class="xref py py-class docutils literal notranslate"><span class="pre">Protocol</span></code></a>.</p> <p><em>stream_reader</em> is a <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> instance, <em>client_connected_cb</em> is an optional function called with (stream_reader, stream_writer) when a connection is made, <em>loop</em> is the event loop instance to use.</p> <p>(This is a helper class instead of making <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> itself a <a class="reference internal" href="asyncio-protocol.html#asyncio.Protocol" title="asyncio.Protocol"><code class="xref py py-class docutils literal notranslate"><span class="pre">Protocol</span></code></a> subclass, because the <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> has other potential uses, and to prevent the user of the <a class="reference internal" href="#asyncio.StreamReader" title="asyncio.StreamReader"><code class="xref py py-class docutils literal notranslate"><span class="pre">StreamReader</span></code></a> from accidentally calling inappropriate methods of the protocol.)</p> </dd></dl> </div> <div class="section" id="incompletereaderror"> <h2>18.5.5.5. IncompleteReadError<a class="headerlink" href="#incompletereaderror" title="Permalink to this headline">¶</a></h2> <dl class="exception"> <dt id="asyncio.IncompleteReadError"> <em class="property">exception </em><code class="descclassname">asyncio.</code><code class="descname">IncompleteReadError</code><a class="headerlink" href="#asyncio.IncompleteReadError" title="Permalink to this definition">¶</a></dt> <dd><blockquote> <div>Incomplete read error, subclass of <a class="reference internal" href="exceptions.html#EOFError" title="EOFError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code></a>.</div></blockquote> <dl class="attribute"> <dt id="asyncio.IncompleteReadError.expected"> <code class="descname">expected</code><a class="headerlink" href="#asyncio.IncompleteReadError.expected" title="Permalink to this definition">¶</a></dt> <dd><p>Total number of expected bytes (<a class="reference internal" href="functions.html#int" title="int"><code class="xref py py-class docutils literal notranslate"><span class="pre">int</span></code></a>).</p> </dd></dl> <dl class="attribute"> <dt id="asyncio.IncompleteReadError.partial"> <code class="descname">partial</code><a class="headerlink" href="#asyncio.IncompleteReadError.partial" title="Permalink to this definition">¶</a></dt> <dd><p>Read bytes string before the end of stream was reached (<a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a>).</p> </dd></dl> </dd></dl> </div> <div class="section" id="limitoverrunerror"> <h2>18.5.5.6. LimitOverrunError<a class="headerlink" href="#limitoverrunerror" title="Permalink to this headline">¶</a></h2> <dl class="exception"> <dt id="asyncio.LimitOverrunError"> <em class="property">exception </em><code class="descclassname">asyncio.</code><code class="descname">LimitOverrunError</code><a class="headerlink" href="#asyncio.LimitOverrunError" title="Permalink to this definition">¶</a></dt> <dd><p>Reached the buffer limit while looking for a separator.</p> <dl class="attribute"> <dt id="asyncio.LimitOverrunError.consumed"> <code class="descname">consumed</code><a class="headerlink" href="#asyncio.LimitOverrunError.consumed" title="Permalink to this definition">¶</a></dt> <dd><p>Total number of to be consumed bytes.</p> </dd></dl> </dd></dl> </div> <div class="section" id="stream-examples"> <h2>18.5.5.7. Stream examples<a class="headerlink" href="#stream-examples" title="Permalink to this headline">¶</a></h2> <div class="section" id="tcp-echo-client-using-streams"> <span id="asyncio-tcp-echo-client-streams"></span><h3>18.5.5.7.1. TCP echo client using streams<a class="headerlink" href="#tcp-echo-client-using-streams" title="Permalink to this headline">¶</a></h3> <p>TCP echo client using the <a class="reference internal" href="#asyncio.open_connection" title="asyncio.open_connection"><code class="xref py py-func docutils literal notranslate"><span class="pre">asyncio.open_connection()</span></code></a> function:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">asyncio</span> <span class="nd">@asyncio</span><span class="o">.</span><span class="n">coroutine</span> <span class="k">def</span> <span class="nf">tcp_echo_client</span><span class="p">(</span><span class="n">message</span><span class="p">,</span> <span class="n">loop</span><span class="p">):</span> <span class="n">reader</span><span class="p">,</span> <span class="n">writer</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">open_connection</span><span class="p">(</span><span class="s1">&#39;127.0.0.1&#39;</span><span class="p">,</span> <span class="mi">8888</span><span class="p">,</span> <span class="n">loop</span><span class="o">=</span><span class="n">loop</span><span class="p">)</span> <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Send: </span><span class="si">%r</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">message</span><span class="p">)</span> <span class="n">writer</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">message</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span> <span class="n">data</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span> <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Received: </span><span class="si">%r</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">data</span><span class="o">.</span><span class="n">decode</span><span class="p">())</span> <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Close the socket&#39;</span><span class="p">)</span> <span class="n">writer</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">message</span> <span class="o">=</span> <span class="s1">&#39;Hello World!&#39;</span> <span class="n">loop</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">get_event_loop</span><span class="p">()</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">tcp_echo_client</span><span class="p">(</span><span class="n">message</span><span class="p">,</span> <span class="n">loop</span><span class="p">))</span> <span class="n">loop</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> </pre></div> </div> <div class="admonition seealso"> <p class="first admonition-title">See also</p> <p class="last">The <a class="reference internal" href="asyncio-protocol.html#asyncio-tcp-echo-client-protocol"><span class="std std-ref">TCP echo client protocol</span></a> example uses the <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_connection" title="asyncio.AbstractEventLoop.create_connection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AbstractEventLoop.create_connection()</span></code></a> method.</p> </div> </div> <div class="section" id="tcp-echo-server-using-streams"> <span id="asyncio-tcp-echo-server-streams"></span><h3>18.5.5.7.2. TCP echo server using streams<a class="headerlink" href="#tcp-echo-server-using-streams" title="Permalink to this headline">¶</a></h3> <p>TCP echo server using the <a class="reference internal" href="#asyncio.start_server" title="asyncio.start_server"><code class="xref py py-func docutils literal notranslate"><span class="pre">asyncio.start_server()</span></code></a> function:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">asyncio</span> <span class="nd">@asyncio</span><span class="o">.</span><span class="n">coroutine</span> <span class="k">def</span> <span class="nf">handle_echo</span><span class="p">(</span><span class="n">reader</span><span class="p">,</span> <span class="n">writer</span><span class="p">):</span> <span class="n">data</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span> <span class="n">message</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span> <span class="n">addr</span> <span class="o">=</span> <span class="n">writer</span><span class="o">.</span><span class="n">get_extra_info</span><span class="p">(</span><span class="s1">&#39;peername&#39;</span><span class="p">)</span> <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Received </span><span class="si">%r</span><span class="s2"> from </span><span class="si">%r</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">message</span><span class="p">,</span> <span class="n">addr</span><span class="p">))</span> <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Send: </span><span class="si">%r</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="n">message</span><span class="p">)</span> <span class="n">writer</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="k">yield from</span> <span class="n">writer</span><span class="o">.</span><span class="n">drain</span><span class="p">()</span> <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Close the client socket&quot;</span><span class="p">)</span> <span class="n">writer</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">loop</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">get_event_loop</span><span class="p">()</span> <span class="n">coro</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">start_server</span><span class="p">(</span><span class="n">handle_echo</span><span class="p">,</span> <span class="s1">&#39;127.0.0.1&#39;</span><span class="p">,</span> <span class="mi">8888</span><span class="p">,</span> <span class="n">loop</span><span class="o">=</span><span class="n">loop</span><span class="p">)</span> <span class="n">server</span> <span class="o">=</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">coro</span><span class="p">)</span> <span class="c1"># Serve requests until Ctrl+C is pressed</span> <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Serving on </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">server</span><span class="o">.</span><span class="n">sockets</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">getsockname</span><span class="p">()))</span> <span class="k">try</span><span class="p">:</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_forever</span><span class="p">()</span> <span class="k">except</span> <span class="ne">KeyboardInterrupt</span><span class="p">:</span> <span class="k">pass</span> <span class="c1"># Close the server</span> <span class="n">server</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">server</span><span class="o">.</span><span class="n">wait_closed</span><span class="p">())</span> <span class="n">loop</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> </pre></div> </div> <div class="admonition seealso"> <p class="first admonition-title">See also</p> <p class="last">The <a class="reference internal" href="asyncio-protocol.html#asyncio-tcp-echo-server-protocol"><span class="std std-ref">TCP echo server protocol</span></a> example uses the <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_server" title="asyncio.AbstractEventLoop.create_server"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AbstractEventLoop.create_server()</span></code></a> method.</p> </div> </div> <div class="section" id="get-http-headers"> <h3>18.5.5.7.3. Get HTTP headers<a class="headerlink" href="#get-http-headers" title="Permalink to this headline">¶</a></h3> <p>Simple example querying HTTP headers of the URL passed on the command line:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">asyncio</span> <span class="kn">import</span> <span class="nn">urllib.parse</span> <span class="kn">import</span> <span class="nn">sys</span> <span class="nd">@asyncio</span><span class="o">.</span><span class="n">coroutine</span> <span class="k">def</span> <span class="nf">print_http_headers</span><span class="p">(</span><span class="n">url</span><span class="p">):</span> <span class="n">url</span> <span class="o">=</span> <span class="n">urllib</span><span class="o">.</span><span class="n">parse</span><span class="o">.</span><span class="n">urlsplit</span><span class="p">(</span><span class="n">url</span><span class="p">)</span> <span class="k">if</span> <span class="n">url</span><span class="o">.</span><span class="n">scheme</span> <span class="o">==</span> <span class="s1">&#39;https&#39;</span><span class="p">:</span> <span class="n">connect</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">open_connection</span><span class="p">(</span><span class="n">url</span><span class="o">.</span><span class="n">hostname</span><span class="p">,</span> <span class="mi">443</span><span class="p">,</span> <span class="n">ssl</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="n">connect</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">open_connection</span><span class="p">(</span><span class="n">url</span><span class="o">.</span><span class="n">hostname</span><span class="p">,</span> <span class="mi">80</span><span class="p">)</span> <span class="n">reader</span><span class="p">,</span> <span class="n">writer</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">connect</span> <span class="n">query</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;HEAD </span><span class="si">{path}</span><span class="s1"> HTTP/1.0</span><span class="se">\r\n</span><span class="s1">&#39;</span> <span class="s1">&#39;Host: </span><span class="si">{hostname}</span><span class="se">\r\n</span><span class="s1">&#39;</span> <span class="s1">&#39;</span><span class="se">\r\n</span><span class="s1">&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="n">url</span><span class="o">.</span><span class="n">path</span> <span class="ow">or</span> <span class="s1">&#39;/&#39;</span><span class="p">,</span> <span class="n">hostname</span><span class="o">=</span><span class="n">url</span><span class="o">.</span><span class="n">hostname</span><span class="p">)</span> <span class="n">writer</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">query</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">&#39;latin-1&#39;</span><span class="p">))</span> <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> <span class="n">line</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">reader</span><span class="o">.</span><span class="n">readline</span><span class="p">()</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">line</span><span class="p">:</span> <span class="k">break</span> <span class="n">line</span> <span class="o">=</span> <span class="n">line</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">&#39;latin1&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">rstrip</span><span class="p">()</span> <span class="k">if</span> <span class="n">line</span><span class="p">:</span> <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;HTTP header&gt; </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">line</span><span class="p">)</span> <span class="c1"># Ignore the body, close the socket</span> <span class="n">writer</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">url</span> <span class="o">=</span> <span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="n">loop</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">get_event_loop</span><span class="p">()</span> <span class="n">task</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">ensure_future</span><span class="p">(</span><span class="n">print_http_headers</span><span class="p">(</span><span class="n">url</span><span class="p">))</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">task</span><span class="p">)</span> <span class="n">loop</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> </pre></div> </div> <p>Usage:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">example</span><span class="o">.</span><span class="n">py</span> <span class="n">http</span><span class="p">:</span><span class="o">//</span><span class="n">example</span><span class="o">.</span><span class="n">com</span><span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">page</span><span class="o">.</span><span class="n">html</span> </pre></div> </div> <p>or with HTTPS:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">example</span><span class="o">.</span><span class="n">py</span> <span class="n">https</span><span class="p">:</span><span class="o">//</span><span class="n">example</span><span class="o">.</span><span class="n">com</span><span class="o">/</span><span class="n">path</span><span class="o">/</span><span class="n">page</span><span class="o">.</span><span class="n">html</span> </pre></div> </div> </div> <div class="section" id="register-an-open-socket-to-wait-for-data-using-streams"> <span id="asyncio-register-socket-streams"></span><h3>18.5.5.7.4. Register an open socket to wait for data using streams<a class="headerlink" href="#register-an-open-socket-to-wait-for-data-using-streams" title="Permalink to this headline">¶</a></h3> <p>Coroutine waiting until a socket receives data using the <a class="reference internal" href="#asyncio.open_connection" title="asyncio.open_connection"><code class="xref py py-func docutils literal notranslate"><span class="pre">open_connection()</span></code></a> function:</p> <div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">asyncio</span> <span class="k">try</span><span class="p">:</span> <span class="kn">from</span> <span class="nn">socket</span> <span class="k">import</span> <span class="n">socketpair</span> <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span> <span class="kn">from</span> <span class="nn">asyncio.windows_utils</span> <span class="k">import</span> <span class="n">socketpair</span> <span class="nd">@asyncio</span><span class="o">.</span><span class="n">coroutine</span> <span class="k">def</span> <span class="nf">wait_for_data</span><span class="p">(</span><span class="n">loop</span><span class="p">):</span> <span class="c1"># Create a pair of connected sockets</span> <span class="n">rsock</span><span class="p">,</span> <span class="n">wsock</span> <span class="o">=</span> <span class="n">socketpair</span><span class="p">()</span> <span class="c1"># Register the open socket to wait for data</span> <span class="n">reader</span><span class="p">,</span> <span class="n">writer</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">open_connection</span><span class="p">(</span><span class="n">sock</span><span class="o">=</span><span class="n">rsock</span><span class="p">,</span> <span class="n">loop</span><span class="o">=</span><span class="n">loop</span><span class="p">)</span> <span class="c1"># Simulate the reception of data from the network</span> <span class="n">loop</span><span class="o">.</span><span class="n">call_soon</span><span class="p">(</span><span class="n">wsock</span><span class="o">.</span><span class="n">send</span><span class="p">,</span> <span class="s1">&#39;abc&#39;</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span> <span class="c1"># Wait for data</span> <span class="n">data</span> <span class="o">=</span> <span class="k">yield from</span> <span class="n">reader</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">100</span><span class="p">)</span> <span class="c1"># Got data, we are done: close the socket</span> <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Received:&quot;</span><span class="p">,</span> <span class="n">data</span><span class="o">.</span><span class="n">decode</span><span class="p">())</span> <span class="n">writer</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="c1"># Close the second socket</span> <span class="n">wsock</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="n">loop</span> <span class="o">=</span> <span class="n">asyncio</span><span class="o">.</span><span class="n">get_event_loop</span><span class="p">()</span> <span class="n">loop</span><span class="o">.</span><span class="n">run_until_complete</span><span class="p">(</span><span class="n">wait_for_data</span><span class="p">(</span><span class="n">loop</span><span class="p">))</span> <span class="n">loop</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> </pre></div> </div> <div class="admonition seealso"> <p class="first admonition-title">See also</p> <p>The <a class="reference internal" href="asyncio-protocol.html#asyncio-register-socket"><span class="std std-ref">register an open socket to wait for data using a protocol</span></a> example uses a low-level protocol created by the <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.create_connection" title="asyncio.AbstractEventLoop.create_connection"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AbstractEventLoop.create_connection()</span></code></a> method.</p> <p class="last">The <a class="reference internal" href="asyncio-eventloop.html#asyncio-watch-read-event"><span class="std std-ref">watch a file descriptor for read events</span></a> example uses the low-level <a class="reference internal" href="asyncio-eventloop.html#asyncio.AbstractEventLoop.add_reader" title="asyncio.AbstractEventLoop.add_reader"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AbstractEventLoop.add_reader()</span></code></a> method to register the file descriptor of a socket.</p> </div> </div> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">18.5.5. Streams (coroutine based API)</a><ul> <li><a class="reference internal" href="#stream-functions">18.5.5.1. Stream functions</a></li> <li><a class="reference internal" href="#streamreader">18.5.5.2. StreamReader</a></li> <li><a class="reference internal" href="#streamwriter">18.5.5.3. StreamWriter</a></li> <li><a class="reference internal" href="#streamreaderprotocol">18.5.5.4. StreamReaderProtocol</a></li> <li><a class="reference internal" href="#incompletereaderror">18.5.5.5. IncompleteReadError</a></li> <li><a class="reference internal" href="#limitoverrunerror">18.5.5.6. LimitOverrunError</a></li> <li><a class="reference internal" href="#stream-examples">18.5.5.7. Stream examples</a><ul> <li><a class="reference internal" href="#tcp-echo-client-using-streams">18.5.5.7.1. TCP echo client using streams</a></li> <li><a class="reference internal" href="#tcp-echo-server-using-streams">18.5.5.7.2. TCP echo server using streams</a></li> <li><a class="reference internal" href="#get-http-headers">18.5.5.7.3. Get HTTP headers</a></li> <li><a class="reference internal" href="#register-an-open-socket-to-wait-for-data-using-streams">18.5.5.7.4. Register an open socket to wait for data using streams</a></li> </ul> </li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="asyncio-protocol.html" title="previous chapter">18.5.4. Transports and protocols (callback based API)</a></p> <h4>Next topic</h4> <p class="topless"><a href="asyncio-subprocess.html" title="next chapter">18.5.6. Subprocess</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li> <a href="https://github.com/python/cpython/blob/3.6/Doc/library/asyncio-stream.rst" rel="nofollow">Show Source </a> </li> </ul> </div> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="asyncio-subprocess.html" title="18.5.6. Subprocess" >next</a> |</li> <li class="right" > <a href="asyncio-protocol.html" title="18.5.4. Transports and protocols (callback based API)" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> &#187;</li> <li> <a href="../index.html">3.6.7 Documentation</a> &#187; </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> &#187;</li> <li class="nav-item nav-item-2"><a href="ipc.html" >18. Interprocess Communication and Networking</a> &#187;</li> <li class="nav-item nav-item-3"><a href="asyncio.html" >18.5. <code class="docutils literal notranslate"><span class="pre">asyncio</span></code> — Asynchronous I/O, event loop, coroutines and tasks</a> &#187;</li> <li class="right"> <div class="inline-search" style="display: none" role="search"> <form class="inline-search" action="../search.html" method="get"> <input placeholder="Quick search" type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('.inline-search').show(0);</script> | </li> </ul> </div> <div class="footer"> &copy; <a href="../copyright.html">Copyright</a> 2001-2023, Python Software Foundation. <br /> The Python Software Foundation is a non-profit corporation. <a href="https://www.python.org/psf/donations/">Please donate.</a> <br /> Last updated on Dec 18, 2023. <a href="../bugs.html">Found a bug</a>? <br /> Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.7.6. </div> </body> </html>
webs 1.0 - Enhanced UI