why-python_listing3

Listing 3. Metaclass Function def copy_instance(toclass, fromdict): # Initialize a class object of given type from a conformant dictionary. class_sig = toclass.__dict__.keys(); class_sig.sort() dict_keys = fromdict.keys(); dict_keys.sort() common = intersect(class_sig, dict_keys) if 'typemap' in class_sig: class_sig.remove('typemap') if tuple(class_sig) != tuple(dict_keys): print "Conformability…