#encoding=utf-8 """http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/""" class GreekGetter: """A simple localizer a la gettext""" def __init__(self): self.trans = dict(dog="σκύλος", cat="γάτα") def get(self, msgid): """We'll punt if we don't have a translation""" try: return self.trans[msgid] except KeyError: return str(msgid) class EnglishGetter: """Simply echoes the msg ids""" def get(self, msgid): return str(msgid) def get_localizer(language="English"): """The factory method""" languages = dict(English=EnglishGetter, Greek=GreekGetter) return languages[language]() # Create our localizers e, g = get_localizer("English"), get_localizer("Greek") # Localize some text for msgid in "dog parrot cat bear".split(): print(e.get(msgid), g.get(msgid))
点击run it 运行之!!!