Fix python evaluation

[fjardon]

I discovered what I believe is a bug in the python generator:

• when two functions, A and B are defined at the global scope
• A is evaluated inside an expression
• A uses an expression trying to evaluate B

Then the script abort with an error because B is not found in the evaluation context of the expression inside A.

I have two commits:

• unit test to show the, presumably, wrong behavior
• fix

Best regards, Frederic Jardon

[sustrik]

Nice! Can you state that the patch is submitted under MIT/X11 license?

[fjardon]

This patch is submitted under MIT/X11 license

[fjardon]

I updated the commit messages as well to include the MIT/X11 licensing

[sustrik]

Merged. Thanks!