Re: subprocess and & (ampersand)
- From: Tim Golden <mail@xxxxxxxxxxxxxxx>
- Date: Wed, 23 Jan 2008 11:12:57 +0000
Steven Bethard wrote:
I'm having trouble using the subprocess module on Windows when my command line includes special characters like "&" (ampersand)::
>>> command = 'lynx.bat', '-dump', 'http://www.example.com/?x=1&y=2'
>>> kwargs = dict(stdin=subprocess.PIPE,
... stdout=subprocess.PIPE,
... stderr=subprocess.PIPE)
>>> proc = subprocess.Popen(command, **kwargs)
>>> proc.stderr.read()
"'y' is not recognized as an internal or external command,\r\noperable program or batch file.\r\n"
As you can see, Windows is interpreting that "&" as separating two commands, instead of being part of the single argument as I intend it to be above. Is there any workaround for this? How do I get "&" treated like a regular character using the subprocess module?
Although I'm sure you'll have looked into this already, the
subprocess module on Windows is using CreateProcess pretty
straightforwardly:
http://msdn2.microsoft.com/en-us/library/ms682425(VS.85).aspx
The docs there say that, to call a batch file, you need to
specify the command interpreter with /c and pass the batch
file, but as far as I can see it makes no difference! (Probably
means there's a special-caser behind the scenes of CreateProcess).
TJG
.
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