popen2.py 文件源码

def popen3(cmd, bufsize=-1, mode='t'):
        """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
        be a sequence, in which case arguments will be passed directly to the
        program without shell intervention (as with os.spawnv()). If 'cmd' is a
        string it will be passed to the shell (as with os.system()). If
        'bufsize' is specified, it sets the buffer size for the I/O pipes. The
        file objects (child_stdout, child_stdin, child_stderr) are returned."""
        w, r, e = os.popen3(cmd, mode, bufsize)
        return r, w, e