Python curious behavior

[scidam]

Return a value via return is different use case and need the try-except clause.

May be I something misunderstood, but according to docs this could not be handled via try-except "except that, as currently, the exception cannot be caught by except clauses within the returning generator.".

No, because the construct is useful.

I just told about raising a warning, not an exception. This is only polite way to point user's
attention on using return and yield in the same place. Such warning passed to stdout would be informative, I think.
This warning wouldn't break any existing code.