计算词频并从中制作字典 [英] Counting word frequency and making a dictionary from it

问题描述

我想从文本文件中取出每个单词，并计算字典中的词频.

I want to take every word from a text file, and count the word frequency in a dictionary.

示例:'这是文本文件，用于取词和计数'

d = {'this': 1, 'is': 2, 'the': 1, ...} 

我还没有那么远，但我就是不知道如何完成它.到目前为止我的代码:

I am not that far, but I just can't see how to complete it. My code so far:

import sys

argv = sys.argv[1]
data = open(argv)
words = data.read()
data.close()
wordfreq = {}
for i in words:
    #there should be a counter and somehow it must fill the dict.

推荐答案

如果不想使用collections.Counter，可以自己写函数:

If you don't want to use collections.Counter, you can write your own function:

import sys

filename = sys.argv[1]
fp = open(filename)
data = fp.read()
words = data.split()
fp.close()

unwanted_chars = ".,-_ (and so on)"
wordfreq = {}
for raw_word in words:
    word = raw_word.strip(unwanted_chars)
    if word not in wordfreq:
        wordfreq[word] = 0 
    wordfreq[word] += 1

为了更好的东西，看看正则表达式.

for finer things, look at regular expressions.

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