python过滤字符串中不属于指定集合中字符的类实例
本文实例讲述了python过滤字符串中不属于指定集合中字符的类。分享给大家供大家参考。具体如下:
#-*-coding:utf-8-*- importsets classKeeper(object): def__init__(self,keep): self.keep=sets.Set(map(ord,keep)) def__getitem__(self,n): ifnnotinself.keep: returnNone returnunichr(n) def__call__(self,s): returns.translate(self) makefilter=Keeper if__name__=='__main__': just_vowels=makefilter('aeiouy') printjust_vowels(u'fourscoreandsevenyearsago') #输出:ouoeaeeyeaao printjust_vowels(u'tiger,tigerburningbright') #输出:ieieuii
希望本文所述对大家的Python程序设计有所帮助。