Python Counter list

You can Count elements in a list with collections Counter in Python. Counter is a subclass of dict that’s specially designed for counting hashable objects in Python. It’s a dictionary that stores objects as keys and counts as values.

Python Counter list

Simple example code get list count. Counter object is created by passing a list to collections.Counter(). In python, a list is an iterable object. The elements in the list are given to the counter and it will convert it.

import collections

l = ['a', 'a', 'a', 'a', 'b', 'c', 'c']

c = collections.Counter(l)
print(c)
print(type(c))
print(issubclass(type(c), dict))

Output:

You can also use dict methods such as keys(), values(), and items()

print(c.keys())
# dict_keys(['a', 'b', 'c'])

print(c.values())
# dict_values([4, 1, 2])

print(c.items())
# dict_items([('a', 4), ('b', 1), ('c', 2)])

Do comment if you have any doubts or suggestions on this Python counter topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.

Python Counter list