how to check if key and value exists in dictionary 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: contanskey in python

d = {
  "a": 1,
  "b": 2
}

# To check if key is there in the dictionary
if "a" in d:
  print("Found")