Use set to key vowels : Set « Data Structure « Python

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Python » Data Structure » Set Screenshots  Use set to key vowels   import sets class Keeper(object):     def __init__(self, keep):         self.keep = sets.Set(map(ord, keep))     def __getitem__(self, n):         if n not in self.keep:             return None         return unichr(n)     def __call__(self, s):         return s.translate(self)          makefilter = Keeper if __name__ == '__main__':     just_vowels = makefilter('aeiouy')     print just_vowels(u'four score and seven years ago')     print just_vowels(u'tiger, tiger burning bright')                          Related examples in the same category 1.  set intersection 2.  Make 2 sets out of sequences: Intersection, Union, Difference