python统计单词出现的次数

最新推荐文章于 2025-03-31 18:32:45 发布

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最新推荐文章于 2025-03-31 18:32:45 发布 · 1.5k 阅读

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本文介绍了如何使用Python的collections.Counter模块来统计文本中单词出现的次数，详细讲解了Counter类的一些常见方法。

from collections import Counter


text = 'hello world hello world hello hello world hello world'

print(Counter(text.split())

一些Counter常用的方法

 |  Counter()
 |  
 |  Note:  If a count is set to zero or reduced to zero, it will remain
 |  in the counter until the entry is deleted or the counter is cleared:
 |  
 |  >>> c = Counter('aaabbc')
 |  >>> c['b'] -= 2                     # reduce the count of 'b' by two
 |  >>> c.most_common()                 # 'b' is still in, but its count is zero
 |  [('a', 3), ('c', 1), ('b', 0)]

 |  elements(self)
 |      Iterator over elements repeating each as many times as its count.
 |      
 |      >>> c = Counter('ABCABC')
 |      >>> sorted(c.elements())
 |      ['A', 'A', 'B', 'B', 'C', 'C']
 |      
 |      # Knuth's example for prime factors of 1836:  2**2 * 3**3 * 17**1
 |      >>> prime_factors = Counter({2: 2, 3: 3, 17: 1})
 |      >>&g