New submission from Todd Whiteman <[EMAIL PROTECTED]>:
I'm getting a 'The handle is invalid' error when using subprocess.Popen
in Python 2.5 (and 2.6). If any of the stdio handles are somehow invalid
or not real io handles (fd is not 0, 1 or 2), and you are not telling
subprocess to PIPE all of the handles, then subprocess throws the
following exception.
The easiest way to reproduce this is using run PythonWin from a Windows
Command Prompt:
C:\Python\Lib\site-packages\pythonwin\Pythonwin.exe
and then use the following 2 subprocess code lines below:
import subprocess
p = subprocess.Popen(["python", "-c", "print 32"], stdin=None,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
File "C:\Python26\lib\subprocess.py", line 588, in init_
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
File "C:\Python26\lib\subprocess.py", line 703, in _get_handles
p2cread = self._make_inheritable(p2cread)
File "C:\Python26\lib\subprocess.py", line 748, in _make_inheritable
DUPLICATE_SAME_ACCESS)
WindowsError: [Error 6] The handle is invalid
Specifying PIPE for all subprocess.Popen handles is the only way I've
found to get around this problem:
p = subprocess.Popen(["python", "-c", "print 32"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
p.stdin.close()
p.communicate()
('32\r\n', '')
----------
components: Windows
messages: 73408
nosy: trentm, twhitema
severity: normal
status: open
title: subprocess failing in GUI applications on Windows
versions: Python 2.5, Python 2.6
_______________________________________
Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue3905>
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