You can do that using count or collection Counter to Count repeated elements in a list Python. Each count the call goes over the entire list of n elements. Calling count in a loop n times means n * n total checks.
Count repeated elements in the list of Python
A simple example code gets a count of the number of elements repeated in a list.
from collections import Counter
MyList = ["a", "b", "a", "c", "c", "a", "c"]
# count
my_dict = {i: MyList.count(i) for i in MyList}
print(my_dict)
# counter
res = Counter(MyList)
print(res)
Output:
Much faster-using pandas: pd.DataFrame(MyList, columns=["x"]).groupby('x').size().to_dict()
if you use a ‘set’ for get unique values in the ‘for’ it will go faster: setList = list(set(Mylist)) my_dict = {i:MyList.count(i) for i in setList}
Do comment if you have any doubts or suggestions on this Python list 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.