all Python 3Lists (list)function
list.count
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Return the number of occurrences of a value in the list (compared with ==).
Syntax
lst.count(value)Every call rescans the whole list, so counting frequencies by looping over the elements and calling count() each time is quadratic — collections.Counter does the same work in a single pass. Matching uses ==, not the type, so True is indistinguishable from 1 and False from 0, which can surprise you in a mixed list. It tells you how many, never where — that is index()'s job.
Examples
nums = [1, 2, 2, 3, 2]
print(nums.count(2)) # → 3
print(nums.count(9)) # → 0See also
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