可以下载一长篇的英文小说，进行词频的分析。
1.读入待分析的字符串
2.分解提取单词
3.计数字典
4.排除语法型词汇
5.排序
6.输出TOP(20)
7.对输出结果的简要说明。
str='''I've been reading books of old The legends and the myths Achilles and his gold Hercules and his gifts Spiderman's control And Batman with his fists And clearly I don't see myself upon that list She said, where'd you wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can kiss I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this I want something just like this I've been reading books of old The legends and the myths The testaments they told The moon and its eclipse And Superman unrolls A suit before he lifts But I'm not the kind of person that it fits She said, where'd you wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can miss I want something just like this I want something just like this Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Where'd ya wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can kiss I want something just like this Oh I want something just like this Oh I want something just like this Oh I want something just like this''' fo=open('test.txt','w') fo.write('''I've been reading books of old The legends and the myths Achilles and his gold Hercules and his gifts Spiderman's control And Batman with his fists And clearly I don't see myself upon that list She said, where'd you wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can kiss I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this I want something just like this I've been reading books of old The legends and the myths The testaments they told The moon and its eclipse And Superman unrolls A suit before he lifts But I'm not the kind of person that it fits She said, where'd you wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can miss I want something just like this I want something just like this Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Oh I want something just like this Doo-doo-doo, doo-doo-doo Doo-doo-doo, doo-doo Doo-doo-doo, doo-doo-doo Where'd ya wanna go? How much you wanna risk? I'm not looking for somebody With some superhuman gifts Some superhero Some fairytale bliss Just something I can turn to Somebody I can kiss I want something just like this Oh I want something just like this Oh I want something just like this Oh I want something just like this''') fo.close() fo=open('text.txt','r') str=fo.read() fo.close() #字母转换小写 str = str.lower() #转换标点符号为空格 for i in ",.?": str =str.replace(i," ") #每一个单词的分隔 words=str.split(' ') #字典转换集合并计数单词出现次数 dic={} keys=set(words) for w in keys: dic[w]=words.count(w) #单词计数元组的列表 wc=list(dic.items()) #排序 wc.sort(key=lambda x:x[1], reverse=True) for i in range(20): print(wc[i])
