Why doesn't os.popen() work in PythonWin on NT?
The reason that os.popen doesn’t work from within PythonWin is due to a bug in Microsoft’s C Runtime Library (CRT). The CRT assumes you have a Win32 console attached to the process.
You should use the win32pipe module’s popen instead which doesn’t depend on having an attached Win32 console.
import win32pipe f = win32pipe.popen('dir /c c:\\') print f.readlines() f.close()