def verify_matching_signatures(implementation, dispatcher): """Verify that a dispatcher function has the right signature.""" implementation_spec = ArgSpec(*getargspec(implementation)) dispatcher_spec = ArgSpec(*getargspec(dispatcher)) if (implementation_spec.args != dispatcher_spec.args or implementation_spec.varargs != dispatcher_spec.varargs or implementation_spec.keywords != dispatcher_spec.keywords or (bool(implementation_spec.defaults) != bool(dispatcher_spec.defaults)) or (implementation_spec.defaults is not None and len(implementation_spec.defaults) != len(dispatcher_spec.defaults))): raise RuntimeError('implementation and dispatcher for %s have ' 'different function signatures' % implementation) if implementation_spec.defaults is not None: if dispatcher_spec.defaults != (None, ) * len( dispatcher_spec.defaults): raise RuntimeError('dispatcher functions can only use None for ' 'default argument values')
def verify_matching_signatures(implementation, dispatcher): """Verify that a dispatcher function has the right signature.""" implementation_spec = ArgSpec(*getargspec(implementation)) dispatcher_spec = ArgSpec(*getargspec(dispatcher)) if (implementation_spec.args != dispatcher_spec.args or implementation_spec.varargs != dispatcher_spec.varargs or implementation_spec.keywords != dispatcher_spec.keywords or (bool(implementation_spec.defaults) != bool(dispatcher_spec.defaults)) or (implementation_spec.defaults is not None and len(implementation_spec.defaults) != len(dispatcher_spec.defaults))): raise RuntimeError('implementation and dispatcher for %s have ' 'different function signatures' % implementation) if implementation_spec.defaults is not None: if dispatcher_spec.defaults != (None,) * len(dispatcher_spec.defaults): raise RuntimeError('dispatcher functions can only use None for ' 'default argument values')