[issue21080] asyncio.subprocess: connect pipes of two programs

STINNER Victor added the comment: I don't see how to implement this idea, not if it's doable. Anyway, I'm not interested anymore to implement the idea, so I just close this old issue. -- resolution: -> out of date stage: -> resolved status: open -> closed

[issue21080] asyncio.subprocess: connect pipes of two programs

Changes by STINNER Victor : -- components: +Asyncio ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mai

[issue21080] asyncio.subprocess: connect pipes of two programs

Changes by Chris Rebert : -- nosy: +cvrebert ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pytho

[issue21080] asyncio.subprocess: connect pipes of two programs

Changes by Giampaolo Rodola' : -- nosy: +giampaolo.rodola ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https

[issue21080] asyncio.subprocess: connect pipes of two programs

Guido van Rossum added the comment: But how is the first call supposed to know that you don't want a StreamReader? Or the second that you do want one? Maybe we need a new constant instead of PIPE that means "leave it hanging"? -- ___ Python tracker

[issue21080] asyncio.subprocess: connect pipes of two programs

STINNER Victor added the comment: > Oh, I see. Given that it is possible to do using event loop methods, why > don't you write up a complete implementation and then propose to add that to > the asyncio.subprocess module? I don't know that a whole new implementation is needed. I guess that a si

[issue21080] asyncio.subprocess: connect pipes of two programs

Guido van Rossum added the comment: Oh, I see. Given that it is possible to do using event loop methods, why don't you write up a complete implementation and then propose to add that to the asyncio.subprocess module? -- ___ Python tracker

[issue21080] asyncio.subprocess: connect pipes of two programs

STINNER Victor added the comment: > How do you do that with the subprocess module Something like that: --- import subprocess ls = subprocess.Popen(["ls", "-1"], stdout=subprocess.PIPE) wc = subprocess.Popen(["wc", "-l"], stdin=ls.stdout) ls.wait() wc.wait() --- > and why doesn't that work with

[issue21080] asyncio.subprocess: connect pipes of two programs

Guido van Rossum added the comment: How do you do that with the subprocess module, and why doesn't that work with asyncio? -- ___ Python tracker ___

[issue21080] asyncio.subprocess: connect pipes of two programs

New submission from STINNER Victor: With the current asyncio API, it's not possible to implement the shell command "ls | wc -l" in Python: connect the stdin of a consumer to the stdin of a producer. -- messages: 214994 nosy: gvanrossum, haypo, yselivanov priority: normal severity: norm