py函數列表 -Regex

#實現單詞添加複數的形式 ，這個比較好啊

import re

def match_sxz(noun):
      return re.search('[sxz]$', noun)

def apply_sxz(noun):
      return re.sub('$', 'es', noun)

def match_h(noun):
      return re.search('[^aeioudgkprt]h$', noun)

def apply_h(noun):
      return re.sub('$', 'es', noun)

def match_y(noun):
     return re.search('[^aeiou]y$', noun)

def apply_y(noun):
     return re.sub('y$', 'ies', noun)

def match_default(noun):
     return True

def apply_default(noun):
     return noun + 's'

rules = ((match_sxz, apply_sxz),
(match_h, apply_h),
(match_y, apply_y),
(match_default, apply_default)
)

def plural(noun):
    for matches_rule, apply_rule in rules:
        if matches_rule(noun):
             return apply_rule(noun)
  

"""main """
print plural('why')