Python | Ways to change keys in dictionary
Given a dictionary, the task is to change the key based on the requirement. Let’s see different methods we can do this task.
Method #1 : Using naive method
# Python code to demonstrate# changing keys of dictionary# using naive method # inititialising dictionaryini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # printing initial jsonprint ("initial 1st dictionary", ini_dict) # changing keys of dictionaryini_dict['akash'] = ini_dict['akshat']del ini_dict['akshat'] # printing final resultprint ("final dictionary", str(ini_dict)) |
Output:
initial 1st dictionary {‘akshat’: 15, ‘nikhil’: 1, ‘manjeet’: 10, ‘vashu’: 5}
final dictionary {‘akash’: 15, ‘nikhil’: 1, ‘manjeet’: 10, ‘vashu’: 5}
Method #2: Using pop()
# Python code to demonstrate# changing keys of dictionary# using pop() method # inititialising dictionaryini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # printing initial jsonprint ("initial 1st dictionary", ini_dict) # changing keys of dictionaryini_dict['akash'] = ini_dict.pop('akshat') # printing final resultprint ("final dictionary", str(ini_dict)) |
Output:
initial 1st dictionary {‘akshat’: 15, ‘manjeet’: 10, ‘vashu’: 5, ‘nikhil’: 1}
final dictionary {‘akash’: 15, ‘manjeet’: 10, ‘vashu’: 5, ‘nikhil’: 1}
Method #3: Using zip()
Suppose we want to change all keys of dictionary.
# Python code to demonstrate# changing all keys of dictionary# corresponding to list using zip() # inititialising dictionaryini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # initialising listini_list = ['a', 'b', 'c', 'd'] # printing initial jsonprint ("initial 1st dictionary", ini_dict) # changing keys of dictionaryfinal_dict = dict(zip(ini_list, list(ini_dict.values()))) # printing final resultprint ("final dictionary", str(final_dict)) |
Output:
initial 1st dictionary {‘akshat’: 15, ‘manjeet’: 10, ‘vashu’: 5, ‘nikhil’: 1}
final dictionary {‘c’: 5, ‘d’: 1, ‘a’: 15, ‘b’: 10}
Last Updated on March 1, 2022 by admin