def plural(word):
if word.endswith(‘y‘):
return word[:-1]+‘ies‘
elif word[-1] in ‘sx‘ or word[-2:] in [‘sh‘,‘ch‘]:
return word+‘es‘
elif word.endwith(‘an‘):
return word[-2:]+‘en‘
else:
return word+‘s‘Python名词单数变换为复数函数,布布扣,bubuko.com
原文：http://blog.csdn.net/guoqingchun/article/details/23350925