Test that generated code is proper python code that can run

[kate-holdener]

We need to add a test for the code_generator component that verifies that whatever code our generator comes up with is in fact proper python code that can run without errors (at least on some test data that we provide). Note that this specific test would not use the flask code. It would call on the code_generator directly, and run the generated code (or somehow check if the generated code is 'runnable')

[felipealencar]

Hi @kate-holdener! :)
I have some clues about how to solve this issue: https://docs.python.org/2/library/subprocess.html#subprocess.check_call.
If it's not a problem, could you assign this one to me?

[kate-holdener]

Thanks @felipealencar! I assigned this issue to you.

[kate-holdener]

@felipealencar Some of the generated code will take a long time to run (once we have complex model training in the generated code). I know that tools like pylint will flag any issues with the code that's missing imports and variables that have not been defined. I wonder if there is a way to check if the code can run without actually running the code (because of the computational complexity of the generated code).