On Thu, Oct 29, 2015 at 6:52 PM, David Aldrich <[email protected]>
wrote:
> Hi
>
>
>
> I am working on Linux with Python 3.4.
>
>
>
> I want to do a bash diff on two text files and show just the first 20
> lines of diff’s output. So I tried:
>
>
>
> >>> cmd = 'head -20 <(diff ' + file1 + ' ' + file2 + ')'
>
> >>> subprocess.check_call(cmd, shell=True)
>
>
>
> The command contained in cmd works ok from the bash prompt but not from
> Python code. In Python I get:
>
>
>
> /bin/sh: -c: line 0: syntax error near unexpected token `('
>
>
>
> I think the problem is that check_call is not using the bash shell. So I
> also tried:
>
>
>
> >>> subprocess.check_call("bash", "-O", "extglob", "-c", cmd)
>
Try this
subprocess.check_call(["bash", "-O", "extglob", "-c", cmd])
> Traceback (most recent call last):
>
> File "<stdin>", line 1, in <module>
>
> File "/usr/local/lib/python3.4/subprocess.py", line 556, in check_call
>
> retcode = call(*popenargs, **kwargs)
>
> File "/usr/local/lib/python3.4/subprocess.py", line 537, in call
>
> with Popen(*popenargs, **kwargs) as p:
>
> File "/usr/local/lib/python3.4/subprocess.py", line 767, in __init__
>
> raise TypeError("bufsize must be an integer")
>
> TypeError: bufsize must be an integer
>
>
>
> Can anyone help me with this please?
>
>
>
> Best regards
>
>
>
> David
>
>
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>
>
--
INADA Naoki <[email protected]>
--
https://mail.python.org/mailman/listinfo/python-list
