How to Check if a Tuple Exists in a List in Python

Suppose we have a list of tuples in Python.

lst = [
    (1, 2),
    (4, 5),
    (6, 4)
]

We want to check if a tuple (4, 5) exists in our list lst.

if (4, 5) in lst:
    print('In the list')
else:
    print('Not in the list')