Question

我制作了一个文本字符串并删除了所有非字母符号，并在单词之间添加了空格，但是当我将它们添加到字典中以计算单词的频率时，它会对字母进行计数。我如何计算字典中的单词？

dictionary = {}  

for item in text_string:
    if item in dictionary:
        dictionary[item] = dictionary[item]+1
    else:
        dictionary[item] = 1
print(dictionary)

Answer 1

更改此

for item in text_string:

到这个

for item in text_string.split():

Function .split()将字符串拆分为使用空白字符（包括制表符和换行符）作为分隔符的单词。

Answer 2

你非常接近。由于您声明您的单词已经以空格分隔，因此您需要使用str.split来制作单词列表。

以下是一个例子：

dictionary = {}  

text_string = 'there are repeated words in this sring with many words many are repeated'

for item in text_string.split():
    if item in dictionary:
        dictionary[item] = dictionary[item]+1
    else:
        dictionary[item] = 1

print(dictionary)

{'there': 1, 'are': 2, 'repeated': 2, 'words': 2, 'in': 1,
 'this': 1, 'sring': 1, 'with': 1, 'many': 2}

另一种解决方案是使用标准库中提供的collections.Counter：

from collections import Counter

text_string = 'there are repeated words in this sring with many words many are repeated'

c = Counter(text_string.split())

print(c)

Counter({'are': 2, 'repeated': 2, 'words': 2, 'many': 2, 'there': 1,
         'in': 1, 'this': 1, 'sring': 1, 'with': 1})

我的字典统计字母而不是单词

2 个答案: