Python finds the most frequently occurring elements in a list

The examples in this article describe Python’s method of finding the most frequently occurring elements in a list. Share it with everyone for your reference, the details are as follows:

Assume that a list contains various elements, you need to count the number of occurrences of each element, and print out the top three most frequently occurring elements. What are the differences. The list is as follows:

Copy code The code is as follows:

word_list =["is","you","are","I","am ","OK","is","OK","She","is","OK","is","I"]

Method one (conventional method):

>>> word_counter ={}
>>> for word in word_list:
  if word in word_counter:
    word_counter[word] +=1
  else:
    word_counter[word] = 1
>>> popular_word =sorted(word_counter, key = word_counter.get, reverse = True)
)
>>> top_3 = popular_word[:3]
>>> top_3
['is', 'OK', 'I']

Method 2: Applicable to Python2.7

>>> from collections import Counter
>>> c = Counter(word_list)
>>> c.most_common(3)

Method 3:

>>> counter ={}
>>> for i in word_list: counter[i] = counter.get(i, 0) + 1
>>> sorted([ (freq,word) for word, freq in counter.items() ], reverse=True)[:3]
[(4, 'is'), (3, 'OK'), (2, 'I')]

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