python add value to existing key code example

Example 1: add value to dictionary python

dict[key] = value

Example 2: add key to dictionary python

d = {'key': 'value'}
print(d)
# {'key': 'value'}
d['mynewkey'] = 'mynewvalue'
print(d)
# {'key': 'value', 'mynewkey': 'mynewvalue'}