plural.py源代码分析

<script>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</script>"""Pluralize English nouns (stage 6) This program is part of "Dive Into Python", a free Python book for experienced programmers. Visit http://diveintopython.org/ for the latest version. Command line usage: $ python plural6.py noun nouns """ __author__ = "Mark Pilgrim ([e-mail])" __version__ = "$Revision: 1.7 $" __date__ = "$Date: 2004/05/03 19:40:42 $" __copyright__ = "Copyright (c) 2004 Mark Pilgrim" __license__ = "Python" import re def rules(language): for line in file('plural-rules.%s' % language): pattern, search, replace = line.split() #获得分离后的三个字符串 yield lambda word: re.search(pattern, word) and re.sub(search, replace, word) #每次存储一个变量 def plural(noun, language='en'): """returns the plural form of a noun""" for applyRule in rules(language): result = applyRule(noun) if result: return result if __name__ == '__main__': import sys if sys.argv[1:]: print plural(sys.argv[1]) else: print __doc__