Python: count repeated elements in the list [duplicate]

Question

I am new to Python. I am trying to find a simple way of getting a count of the number of elements repeated in a list e.g.

MyList = ["a", "b", "a", "c", "c", "a", "c"] 

Output:

a: 3 b: 1 c: 3 

Answer 1

You can do that using count:

my_dict = {i:MyList.count(i) for i in MyList}  >>> print my_dict     #or print(my_dict) in python-3.x {'a': 3, 'c': 3, 'b': 1} 

Or using collections.Counter:

from collections import Counter  a = dict(Counter(MyList))  >>> print a           #or print(a) in python-3.x {'a': 3, 'c': 3, 'b': 1} 

Answer 2

Use Counter

>>> from collections import Counter >>> MyList = ["a", "b", "a", "c", "c", "a", "c"] >>> c = Counter(MyList) >>> c Counter({'a': 3, 'c': 3, 'b': 1})