python change a key in a dictionary

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showing results for - "python change a key in a dictionary"
Lilly
11 Jul 2017
1# Basic syntax:
2# Approach 1:
3dictionary[new_key] = dictionary[old_key]
4del dictionary[old_key]
5
6# Approach 2:
7dictionary[new_key] = dictionary.pop(old_key)
Daisy
22 Jan 2018
1my_dict  =  {
2   'foo': 42,
3   'bar': 12.5
4}
5my_dict['foo']  =  "Hello"
6print(my_dict['foo'])
7#This will give the output:
8
9'Hello'
Rafael
24 Feb 2017
1a_dict = {"a": 1, "B": 2, "C": 3}
2
3new_key = "A"
4old_key = "a"
5a_dict[new_key] = a_dict.pop(old_key)
6
7print(a_dict)
8OUTPUT
9{'B': 2, 'C': 3, 'A': 1}
Steven
09 Jan 2018
1>>> dictionary = { 1: 'one', 2:'two', 3:'three' }
2>>> dictionary['ONE'] = dictionary.pop(1)
3>>> dictionary
4{2: 'two', 3: 'three', 'ONE': 'one'}
5>>> dictionary['ONE'] = dictionary.pop(1)
6Traceback (most recent call last):
7  File "<input>", line 1, in <module>
8KeyError: 1
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