Pretty print dict_proxy as prefixed in CPython 2.7...
Pretty print dict_proxy as prefixed in CPython 2.7
- Add tests for dict proxies (instances of types.DictProxyType)
- Uses the "dict_proxy({...})" pattern for representation, as happens
in CPython 2.7 with types.DictProxyType.__repr__
- Used ctypes.pythonapi.PyDictProxy_New to instantiate dict proxies
inside the tests
- Only for CPython 2.7: in PyPy the types.DictProxyType is dict, and
in CPython 3 there's no such type, just the new
types.MappingProxyType in CPython 3.3+
