Feature Requests item #1191964, was opened at 2005-04-28 13:40 Message generated for change (Comment added) made by parameter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=355470&aid=1191964&group_id=5470
Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Josiah Carlson (josiahcarlson) Assigned to: Nobody/Anonymous (nobody) Summary: asynchronous Subprocess Initial Comment: It would be terribly nice if the Popen class in the subprocess module would allow a programmer to easily say "send some data right now (if I have some to send) and receive whatever information is available right now". Essentially the equivalent of asyncore.loop(count=1), only that it returns the data received, instead of placing it in a buffer. Why would this functionality be useful? Currently, when using the subprocess module with pipes, the interaction with a pipe is limited to "send data if desired, close the subprocess' stdin, read all output from the subprocess' stdout, ...". Certainly one can pull the pipes out of the Popen instance, and perform the necessary functions on posix systems (with select or poll), but the additional magic on WIndows is a little less obvious (but still possible). There is a post by Paul Du Bois with an example using win32pipe.PeekNamedPipe: http://groups-beta.google.com/group/comp.lang.python/msg/115e9332cc1ca09d?hl=en And a message from Neil Hodgeson stating that PeekNamedPipe works on anonymous pipes: http://mail.python.org/pipermail/python-dev/2000-May/004200.html With this modification, creating Expect-like modules for any platform, as well as embedded shells inside any GUI with a text input widget, becomes easy. Heck, even Idle could use it rather than a socket for its interactive interpreter. ---------------------------------------------------------------------- Comment By: Dave Schuyler (parameter) Date: 2005-04-28 16:38 Message: Logged In: YES user_id=473331 More control of sub-processes would be great. Several times in the past few years I've done stuff with os.system, popenN, or spawn* and it would be useful to have even more cross-platform consistency and support in this area. Anyway, this is just a vote to encurage other developers. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=355470&aid=1191964&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
