check value exist in dictionary in python code example

Example 1: python check if value exists in any key

>>> d = {'1': 'one', '3': 'three', '2': 'two', '5': 'five', '4': 'four'}
>>> 'one' in d.values()
True

Example 2: python check if false in dict

a_dictionary = {"a": 1, "b": 2}
contains_1 = 1 in a_dictionary.values()
print(contains_1)