Count True Booleans in a Python List

In this tutorial, we will learn how to count True Booleans in a Python List. There are 2 boolean values present. They are as following:

• True
• False

Some of the methods to count True Booleans are listed here:

Using count() Method

count() method counts the number of occurrences of an element and returns it.

l=[True, True, False, False, True]

x=l.count(True)

print(x)

Output:
3

Using the sum() Method

sum() method sums up the numbers in a list. True means 1 and False means 0. Hence, the sum() method will add all 1’s and 0’s and will return the count of True Booleans present in the list.

l=[True, True, False, False, True]

x=sum(l)

print(x)

Output:
3

Using the filter() Method

filter() method filters the elements present in the list based on the given condition.

l=[True, True, False, False, True]

x=list(filter(None, l))

print(len(x))

Output:
3

Using list comprehension

List comprehension is a way to create a new list based on an existing list.

l=[True, True, False, False, True]

x=sum(bool(i) for i in l)

print(x)

Output:
3

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