The methods in the Counter class of the python3 collections module are listed.

The methods in the Counter class of the python3 collections module are listed.

Counter: the number of times that a Counter appears.

Counter class inherits the dict class, so it can use the methods in the dict class

Create a Counter class

Import collectionsobj = collections. Counter ('abbccc') print (obj) # output: Counter ({'C': 3, 'A': 2, 'B': 2 })

Elements ()

Import collectionsobj = collections. counter ('abbccc') print (sorted (obj. elements () # output: ['A', 'A', 'B', 'B', 'C', 'C ', 'C'] for k in obj. elements (): # print all elements of obj print (k)

Most_common (specify a parameter n to list the first n elements. If no parameter is specified, all elements are listed)

Import collectionsobj = collections. Counter ('aabbbcccccc') print (obj. most_common (2) # output: [('C', 4), ('B', 3)]

Items (methods inherited from the dict class)

Import collectionsobj = collections. counter ('abbbcccccc') print (obj. items () for k, v in obj. items (): print (k, v) # output: dict_items ([('B', 3), ('C', 4), ('A ', 2)]) # B 3 # c 4 # a 2

Update (add element)

Import collectionsobj = collections. counter (['11', '22']) obj. update (['22', '55']) print (obj) # output: Counter ({'22': 2, '11': 1, '55 ': 1 })

 

 

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