En Tue, 02 Sep 2008 12:39:09 -0300, Derek Martin <[EMAIL PROTECTED]> escribió:
> On Tue, Sep 02, 2008 at 01:57:26PM +0000, Marc 'BlackJack' Rintsch wrote: >> > I would argue that they don't represent processes at all; the object is >> > a set of files which connect the standard I/O streams of a subprocess to >> > its parent, and methods to operate on those files. >> >> And the process' ID, an attribute with the process' return code, a method >> to wait until the process is finished and file objects to communicate >> with the process. > > The name popen is an abbreviation of "pipe open" -- the function, and > the class, open pipes to communicate with another process. What you > said is correct; however there are numerous other ways to open > subprocesses. The focus of popen is the communication aspect -- the > opening and control of the pipes -- not the subprocess. That's the > key difference between popen() and all the other methods of starting a > subprocess. Totally irrelevant here - we are talking about the subprocess module, not the popen C function. >> > The C library's popen() function, on which this class is based, No, subprocess.Popen does not use -directly or indirectly- the C popen function. It uses fork or CreateProcess in Windows. > Note that in all of these links that talk about popen, the focus is on > opening pipes or file objects, not on subprocesses: > > http://www.opengroup.org/onlinepubs/009695399/functions/popen.html > http://docs.python.org/lib/os-newstreams.html > http://us3.php.net/popen > http://docs.hp.com/en/B9106-90010/popen.3S.html > http://www.faqs.org/docs/artu/ch07s02.html Again, irrelevant. > The Linux man page unfortunately copies (verbatim) the FreeBSD man > page, which gets it wrong. You can not open a process, but you can > definitely open a pipe. (Ok, if it doesn't agree with you, it must be wrong) Classes represent "things", and class names should be nouns. Functions represent "actions", and their names should be verbs. popen is a good name for a function; Popen is a bad name for a class. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
