Looking for a tool to checkfor python script backward compatibility

[Baptiste Lepilleur]

I'm looking for a tool that could be used in a pre-commit step to check that
only features available in a "old" python version are used, say python 2.3
for example.

Does any one know of one ?

 

[Lawrence D'Oliveiro]

I'm looking for a tool that could be used in a pre-commit step to check
that only features available in a "old" python version are used, say
python 2.3 for example.

The only sure way would be to run the script under an appropriately old
version of Python.