change value of key dict python code example

Example 1: python change dictionary key

dictionary[new_key] = dictionary[old_key]
del dictionary[old_key]

Example 2: change key of dictionary python

>>> dictionary = { 1: 'one', 2:'two', 3:'three' }
>>> dictionary['ONE'] = dictionary.pop(1)
>>> dictionary
{2: 'two', 3: 'three', 'ONE': 'one'}
>>> dictionary['ONE'] = dictionary.pop(1)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
KeyError: 1