Here are 3 ways to count the number of times an item appears in a Python list:
(1) Using count() to count a specific item. For example, let’s count the number of times “mm” appears in a list:
my_list = ["mm", "bb", "cc", "mm", "mm", "cc"]
count_item = my_list.count("mm")
print(count_item)
The result is 3 times:
3(2) Using Counter to count a specific item. Let’s again count the number of times “mm” appears in a list:
from collections import Counter
my_list = ["mm", "bb", "cc", "mm", "mm", "cc"]
count_all = Counter(my_list)
count_item = count_all.get("mm")
print(count_item)
The result is the same:
3(3) Using Counter to count the number of times each item appears in a list:
from collections import Counter
my_list = ["mm", "bb", "cc", "mm", "mm", "cc"]
count_all = Counter(my_list)
print(count_all)
Here you’ll get the number of times that each item appears in a list:
Counter({'mm': 3, 'cc': 2, 'bb': 1})