On 02.07.2014 19:31, Wolfgang Maier wrote:

I am not 100% sure whether that is the problem, but from what I gather
from the subprocess module docs the args string is passed to the Windows
CreateProcess function as a single string.
To me this seems to imply that it is passed as the lpCommandLine
parameter (with Null for the lpApplicationName parameter).
This is what Microsoft says about this case

If lpApplicationName is NULL, the first white space–delimited token of
the command line specifies the module name. If you are using a long file
name that contains a space, use quoted strings to indicate where the
file name ends and the arguments begin (see the explanation for the
lpApplicationName parameter). If the file name does not contain an
extension, .exe is appended. Therefore, if the file name extension is
.com, this parameter must include the .com extension. If the file name
ends in a period (.) with no extension, or if the file name contains a
path, .exe is not appended. If the file name does not contain a
directory path, the system searches for the executable file in the
following sequence.

So in your case the default behavior would be to add an .exe extension
to pyflakes, which is probably not what you intended ?


Ah, I forgot about your pyflakes -h example, which works, so my explanation must be wrong.


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