Counts the number of occurrences of an item
Usage
Use count() method to find the number of times the specified item appears in the list.
Syntax
list.count(item)
| Parameter | Condition | Description |
| item | Required | Any item (of type string, list, set, etc.) you want to search for. |
Examples
# Count number of occurrences of 'red'
L = ['red', 'green', 'blue']
print(L.count('red'))
# Prints 1# Count number of occurrences of number '9'
L = [1, 9, 7, 3, 9, 1, 9, 2]
print(L.count(9))
# Prints 3Count Multiple Items
If you want to count multiple items in a list, you can call count() in a loop.
This approach, however, requires a separate pass over the list for every count() call; which can be catastrophic for performance. Use couter() method from class collections, instead.
# Count occurrences of all the unique items
L = ['a', 'b', 'c', 'b', 'a', 'a', 'a']
from collections import Counter
print(Counter(L))
# Prints Counter({'a': 4, 'b': 2, 'c': 1})