Membership Testing
Python’s membership operators test for membership in a sequence.
in
The in operator evaluates to True if it finds a given variable in the sequence.
>>> a = 1
>>> b = 20
>>> list = [1, 2, 3, 4, 5]
>>> if (a in list):
... print("a is available in the given list")
... else:
... print("a is not available in the given list")
'a is available in the given list'
not in
The not in operator evaluates to True if it does not find a given variable in the sequence.
>>> a = 1
>>> b = 20
>>> list = [1, 2, 3, 4, 5]
>>> if (b not in list):
... print("b is not available in the given list")
... else:
... print("b is available in the given list")
'b is not available in the given list'