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 dictionary ini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # printing initial json print ("initial 1st dictionary", ini_dict) # changing keys of dictionary ini_dict['akash'] = ini_dict['akshat'] del ini_dict['akshat'] # printing final result print ("final dictionary", str(ini_dict)) |
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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 dictionary ini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # printing initial json print ("initial 1st dictionary", ini_dict) # changing keys of dictionary ini_dict['akash'] = ini_dict.pop('akshat') # printing final result print ("final dictionary", str(ini_dict)) |
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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 dictionary ini_dict = {'nikhil': 1, 'vashu' : 5, 'manjeet' : 10, 'akshat' : 15} # initialising list ini_list = ['a', 'b', 'c', 'd'] # printing initial json print ("initial 1st dictionary", ini_dict) # changing keys of dictionary final_dict = dict(zip(ini_list, list(ini_dict.values()))) # printing final result print ("final dictionary", str(final_dict)) |
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Output:
initial 1st dictionary {‘akshat’: 15, ‘manjeet’: 10, ‘vashu’: 5, ‘nikhil’: 1}
final dictionary {‘c’: 5, ‘d’: 1, ‘a’: 15, ‘b’: 10}
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