pyparser does not correctly handle exception handlers

The FindIdentifiers code in pyparser crashes on an exception handler that uses an expression other than a simple name for the exception type.

The fix is simple. Line 105 in pyparser.py is currently:

self.listener.undeclared_identifiers.add(node.type.id)

Simply replace with this:

self.visit(node.type)

python 3 only apparently

• Fixed bug in Python parsing logic which would fail on Python 3 when a "try/except" targeted a tuple of exception types, rather than a single exception. fixes #227

→ <<cset c314ecf67074>>