Python Document test: Doctest

Doctest: Extracts and tests the code that is annotated in the document.

#!/usr/bin/python# -*- coding: utf-8 -*-class dict (Dict):     "         simple dict but also support access  as x.y style.        >>> d1 =  Dict ()         >>> d1[' x '] = 100         >>> d1.x        100         >>> d1.y = 200         >>> d1[' y ']        200         >>> d2 = dict (a=1, b=2, c= ' 3 ')         >>> d2.c          ' 3 '   &Nbsp;     >>> d2[' Empty ']         Traceback  (most recent call last):             ...        KeyError:  ' Empty '          >>> d2.empty         traceback  (most recent call last):             ...        AttributeError:  ' Dict '  object  has no attribute  ' empty '          '      def __init__ (self, **kw):     super (dict, self). __init__ (**KW)     def __getattr__ (Self, key):    try:     return self[key]&nBsp;   except keyerror:    raise attributeerror (r "' Dict '   object has no attribute  '%s ' " % key)     def __setattr__ (self, key, value):     self[key] = value    if  __name__== ' __main__ ':     import doctest    doctest.testmod ( )

There is nothing out there to prove that the program is correct.

Python Document test: Doctest