Python | Unpacking dictionary keys into tuple

Difficulty Level : Basic
Last Updated : 26 Aug, 2019

In certain cases, we might come in a problem in which we require to unpack dictionary keys to tuples. This kind of problem can occur in cases we are just concerned of keys of dictionaries and wish to have a tuple of it. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using tuple()

The simple type casting of dictionary into a tuple in fact does the required task. This function takes just the keys and converts them into key tuple as required.

# Python3 code to demonstrate working of
# Unpacking dictionary keys into tuple
# Using tuple()
  
# initializing dictionary
test_dict = {'Gfg' : 1, 'is' : 2, 'best' : 3}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# Using tuple()
# Unpacking dictionary keys into tuple
res = tuple(test_dict)
  
# printing result
print("The unpacked dict. keys into tuple is :  " + str(res))

Output :

The original dictionary is : {'best': 3, 'is': 2, 'Gfg': 1}
The unpacked dict. keys into tuple is :  ('best', 'is', 'Gfg')

Method #2 : Using "=" operator and multiple variables
This method can also be used to perform this particular task. In this, we assign the comma separated variables to the dictionary. We use as many variables as keys in dictionary. This method is not recommended in case of unknown or many keys.

# Python3 code to demonstrate working of
# Unpacking dictionary keys into tuple
# Using "=" operator and multiple variables
  
# initializing dictionary
test_dict = {'Gfg' : 1, 'is' : 2, 'best' : 3}
  
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
  
# Using "=" operator and multiple variables
# Unpacking dictionary keys into tuple
a, b, c = test_dict
res = a, b, c
  
# printing result
print("The unpacked dict. keys into tuple is :  " + str(res))

Output :

The original dictionary is : {'best': 3, 'is': 2, 'Gfg': 1}
The unpacked dict. keys into tuple is :  ('best', 'is', 'Gfg')

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Python | Unpacking dictionary keys into tuple