how to handle keyerror exception in python code example

Example: key error python

"""
KeyError exceptions occur when you attempt to index a dictionary with a key
that doesn't exist. Simple example below
"""

my_dict = {
    'key1': 1,
    'key2': 2,
    'key3': 3,
}

                        # Outputs
print (my_dict['key1']) # 1
print (my_dict['key2']) # 2
print (my_dict['key3']) # 3
print (my_dict['key4']) # KeyError: 'key4'