Hi Greg, thank for your replay, but I didn't succeed in any way. You must consider however that I'm not a Python "expert"... IMHO, it must be a script that change part of the interpreter, and substitute a new module (py) in the place of the standard one (py or pyc). The standard module must be saved in order to be able to undo the changes and go back to the normal behaviour. The problem is that I don't know if the built-in functions like open (or file) are written in Python or in C and, besides that, if they can be modified. Other solutions which modify the source to be logged, are not solutions, because it is far simpler to introduce here and there print statements... Bye.
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