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python - 有没有办法分析一个文本文件来检查这个标准

问题描述

我需要创建一个程序来分析文件中的一段文本，然后计算：

到目前为止，我已经成功完成了前两个要点（如下所示），

fileName = open(input('Please enter the full name of the file: '), 'r') 
    w = [len(word) for line in fileName for word in line.rstrip().split(" ")]
    total_w = len(w)
    avg_w = sum(w) / total_w
    
    
  print('The total number of words in this file is:', total_w)
  print('The average length of the words in this file is:', avg_w)

标签： pythonpython-3.xpython-2.7fileword

解决方案

collections.Counter使这相对简单。我re.findall(r'[\w]+', data)用来查找单词（单词是带有字母、下划线和数字的东西）。根据需要进行调整。

import re
from collections import Counter

fn = input('Please enter the full name of the file: ')
with open(fn, 'r') as f:
    words = Counter(re.findall(r'[\w]+', f.read()))
    # use words = Counter(f.read().split()) if everything split by spaces
    # adjust regular expression depending on whether you want or don't want
    # stuff like numbers to be counted as "words"

print('Total number of words:', sum(words.values()))
# this is weighted by word occurrence, not sure whether this is correct
print('Average length of words:', 
      sum(len(w) * o for w, o in words.items()) / sum(words.values()))
print('Word occurrence:', words)
# this only shows letters that actually occur. If you need all letters of 
# the alphabet, you have to add the rest
print('Start letter occurrence', Counter(w[0] for w in words.elements()))

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