Run a external program.

[Yasser Almeida Hernández]

All ran ok!!

Thanks a lot



Quoting MRAB <python at mrabarnett.plus.com>:

> Yasser Almeida Hernández wrote:
>> So, how can i pass an argument as a variable in this context...?
>>
> You can't pass arbitrary values on a command line. In this case, why not
> just pass the path of the file?
>
> s = 'command "%s" -i file2 -w 1.4 -o file3.out' % file1
>
>>
>> Quoting MRAB <python at mrabarnett.plus.com>:
>>
>>> Yasser Almeida Hernández wrote:
>>>> Hi all!!
>>>>
>>>> I'm writing a script where i call a external program which   
>>>> receive  some arguments.
>>>> One of this arguments is stored in a variable, that is passed as   
>>>>  argument as well:
>>>>
>>>> import os
>>>> ...
>>>> f = open(file1, 'r')
>>>> s = 'command $f -i file2 -w 1.4 -o file3.out'
>>>> os.system(s)
>>>> ...
>>>>
>>>> When i run the script i get the next message...
>>>> '-i: No such file or directory'
>>>> ... with a obvious error in the exit of the program. If i remove   
>>>>  the option -i i get the same error with every option, even with   
>>>>  those who don't get any file as argument. (file2 exist).
>>>> BUT, when i run the external program in a python shell, it works...
>>>>
>>>> What's wrong?
>>>>
>>> The name 'f' in the Python script exists only in Python and is unrelated
>>> to the '$f' that the shell sees.
>>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



-- 
Lic. Yasser Almeida Hernández
Center of Molecular Inmunology (CIM)
Nanobiology Group
P.O.Box 16040, Havana, Cuba
Phone: (537) 271-7933, ext. 221

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