【Python學習日記】函數列表

標籤：

import redef 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$‘,‘ies‘,noun)def match_default(noun):    return Truedef apply_default(noun):    return re.sub(‘$‘,‘s‘,noun)rules = ((match_sxz, apply_sxz),         (match_h, apply_h),         (match_y, apply_y),         (match_default, apply_default)         )def plural(noun):    for match_rule, apply_rule in rules:        if(match_rule(noun)):            return apply_rule(noun)print(plural(‘body‘));

改成動態建立函數的方式

import redef build_match_apply_function(pattern, search, replace):    def match_rule(word):        return re.search(pattern, word)    def apply_rule(word):        return re.sub(search, replace, word)    return (match_rule, apply_rule)patterns =          (             (‘[sxz]$‘,‘$‘,‘es‘),             (‘[^aeioudgkprt]h$‘,‘$‘,‘es‘),             (‘(qu|[^aeiou]y$)‘,‘y$‘,‘ies‘),             (‘$‘,‘$‘,‘s‘),             )rules = [build_match_apply_function(pattern, search, replace)         for (pattern, search, replace) in patterns]def plural(noun):    for match_rule, apply_rule in rules:        if(match_rule(noun)):            return apply_rule(noun)print(plural(‘body‘));

　　

【Python學習日記】函數列表