Getting the current directory path and the path where python script is saved

[gialloporpora]

Dear all,
I would like to create a little script to rename my files, I think to 
use argparse module to create it.
I would like to know how to obtain the path where script is executed and 
the path where the file script is stored.

For example, if I save my script in c:\python27 and I put the directory 
in %path% I can execute it from any folder, I would like to get the two 
directory path.

Thanks
Sandro

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