The python filter string does not belong to the class instance of Characters in the specified set. The python string

The python filter string does not belong to the class instance of Characters in the specified set. The python string

This example describes how to filter strings in python that do not belong to characters in a specified set. Share it with you for your reference. The details are as follows:

#-*-Coding: UTF-8-*-import setsclass 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 = Keeperif _ name _ = '_ main _': just_vowels = makefilter ('aeiouy ') print just_vowels (u'four score and seven years ago ') # output: ouoeaeeyeaao print just_vowels (u'tiger, tiger burning bright') # output: ieieuii

I hope this article will help you with Python programming.