如何查找字符串中单词的计数? [英] How to find the count of a word in a string?

问题描述

我有一个字符串Hello I am going to I with hello am".我想找出一个单词在字符串中出现的次数.示例 hello 出现 2 次.我尝试了这种只打印字符的方法 -

I have a string "Hello I am going to I with hello am". I want to find how many times a word occur in the string. Example hello occurs 2 time. I tried this approach that only prints characters -

def countWord(input_string):
    d = {}
    for word in input_string:
        try:
            d[word] += 1
        except:
            d[word] = 1

    for k in d.keys():
        print "%s: %d" % (k, d[k])
print countWord("Hello I am going to I with Hello am")

我想学习如何计算字数.

I want to learn how to find the word count.

推荐答案

如果要查找单个单词的计数，只需使用count:

If you want to find the count of an individual word, just use count:

input_string.count("Hello")

使用 collections.Counter 和 split() 来统计所有的单词:

Use collections.Counter and split() to tally up all the words:

from collections import Counter

words = input_string.split()
wordCount = Counter(words)

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