test_function_definition: if Nothing included in function def --> Improve syntax error messaging

[hugobowne]

hi!

interesting issue: if student writes nothing after def (): within scope of function, then Python throws an error and SCT doesn't work. See screenshot. any cheeky work-around?

[vvnkr]

The problem here is that this is a syntax error (IndentationError inherits from SyntaxError), so the code can not be parsed. There's no work around.

This also was a problem in testwhat, and what we did there is start writing a parser that recognises certain typical syntax errors and generates better readable feedback for them. This is wat we plan to do for pythonwhat too at some point.

[hugobowne]

Very interesting! Worth thinking about in more detail at some point as Intermediate Python II will contain a Chapter on user-defined functions and this will be important there.

[filipsch]

@hugobowne I'll close this issue for now.
Makes more sense to see this as a general feature of adding syntax error diagnostics to SCT output.
See #42