update existing key in dictionary python code example

Example 1: python update dictionary

diction[element] = value
# if element not in diction, create new element

Example 2: how to update dictionary in python

>> a = { "a" : 1, "b" : 2 }
>> b = { "c" : 3, "d" : 4 }
>> a
{'a': 1, 'b': 2}
>> b
{'c': 3, 'd': 4}
>> a.update(b)
>>a
{"a":1,"b":2,"c":3,"d":4}