'''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 str(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, j = get_localizer("English"), get_localizer("Greek")

# Localize some text

for msgid in "dog parrot cat bear".split():

print(e.get(msgid), j.get(msgid))