It's worth noting that Python 3.0 supports function annotations, a feature that can be used to implement type checking in Python. What's more PEP 3107 explicitl

It's worth noting that Python 3.0 supports function annotations, a feature that can be used to implement type checking in Python. What's more PEP 3107 explicitly states that one of the expected use cases is "providing typing information" and "type checking". http://www.python.org/dev/peps/pep-3107/ http://www.python.org/dev/peps/pep-3107/