subprocess.Popen不运行bash命令吗？

Question

I have tried using subprocess .Popen in Python IDLE, in both versions 2.7 and 3.2 and the code didn't work!!!

Thank you.

Answer 1

I suspect that IDLE redirects Python's stdout so that print ing happens in the window, but it doesn't redirect file descriptor 1, so that any subprocess happily prints to that file descriptor.

Try to start IDLE from the command line, run these lines and see if their output is printed to the terminal where IDLE is called from.

Solutions:

1. Don't use IDLE. Call your stuff from a python interpreter called from the command line.

2. Redirect the output of your processes to a pipe, read this pipe and output it. Such as:

    sp = subprocess.Popen(['ls'], stdout=subprocess.PIPE) for i in sp.stdout: print i sp.wait()