python怎么统计单词总数_python统计单词出现次数

python统计单词出现次数

做单词词频统计&＃xff0c;用字典无疑是最合适的数据类型&＃xff0c;单词作为字典的key&＃xff0c; 单词出现的次数作为字典的 value&＃xff0c;很方便地就记录好了每个单词的频率&＃xff0c;字典很像我们的电话本&＃xff0c;每个名字关联一个电话号码。

下面是具体的实现代码&＃xff0c;实现了从importthis.txt文件读取单词&＃xff0c;并统计出现次数最多的5个单词。# -*- coding:utf-8 -*-

import io

import re

class Counter:

def __init__(self, path):

"""

:param path: 文件路径

"""

self.mapping &＃61; dict()

with io.open(path, encoding&＃61;"utf-8") as f:

data &＃61; f.read()

words &＃61; [s.lower() for s in re.findall("\w ", data)]

for word in words:

self.mapping[word] &＃61; self.mapping.get(word, 0) 1

def most_common(self, n):

assert n > 0, "n should be large than 0"

return sorted(self.mapping.items(), key&＃61;lambda item: item[1], reverse&＃61;True)[:n]

if __name__ &＃61;&＃61; &＃39;__main__&＃39;:

most_common_5 &＃61; Counter("importthis.txt").most_common(5)

for item in most_common_5:

print(item)

执行效果&＃xff1a;(&＃39;is&＃39;, 10)

(&＃39;better&＃39;, 8)

(&＃39;than&＃39;, 8)

(&＃39;the&＃39;, 6)

(&＃39;to&＃39;, 5)

更多python教程&＃xff0c;推荐学习&＃xff1a;Python视频教程

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