Given Dictionary with value lists, the task is to write a Python program to assign each key with an index of the maximum value in the value list.
Examples:
Input : test_dict = {“gfg” : [5, 3, 6, 3], “is” : [1, 7, 5, 3], “best” : [9, 1, 3, 5]}
Output : {‘gfg’: 2, ‘is’: 1, ‘best’: 0}
Explanation : Max element in “gfg”‘s value is 6 at 2nd index, hence assigned 2.
Input : test_dict = {“gfg” : [9, 3, 6, 3], “is” : [1, 7, 5, 3], “best” : [9, 1, 3, 5]}
Output : {‘gfg’: 0, ‘is’: 1, ‘best’: 0}
Explanation : Max element in “gfg”‘s value is 9 at 0th index, hence assigned 0.
Method #1 : Using max() + loop + index()
In this, we get the index of the maximum element from the value list using max() and index(). Loop is used for the task of iteration of keys in the dictionary.
Python3
# Python3 code to demonstrate working of # Assign keys with Maximum element index # Using max() + index() + loop # initializing dictionary test_dict = {"gfg": [5, 3, 6, 3], "is": [1, 7, 5, 3], "best": [9, 1, 3, 5]} # printing original dictionary print("The original dictionary is : " + str(test_dict)) res = dict() for key in test_dict: # using index() to get required value res[key] = test_dict[key].index(max(test_dict[key])) # printing result print("The maximum index assigned dictionary : " + str(res)) |
Output:
The original dictionary is : {‘gfg’: [5, 3, 6, 3], ‘is’: [1, 7, 5, 3], ‘best’: [9, 1, 3, 5]}
The maximum index assigned dictionary : {‘gfg’: 2, ‘is’: 1, ‘best’: 0}
Method #2 : Using dictionary comprehension + max() + index()
In this, we perform task of getting result using dictionary comprehension shorthand variation of above method.
Python3
# Python3 code to demonstrate working of # Assign keys with Maximum element index # Using dictionary comprehension + max() + index() # initializing dictionary test_dict = {"gfg": [5, 3, 6, 3], "is": [1, 7, 5, 3], "best": [9, 1, 3, 5]} # printing original dictionary print("The original dictionary is : " + str(test_dict)) # using dictionary comprehension as one liner alternative res = {key: test_dict[key].index(max(test_dict[key])) for key in test_dict} # printing result print("The maximum index assigned dictionary : " + str(res)) |
Output:
The original dictionary is : {‘gfg’: [5, 3, 6, 3], ‘is’: [1, 7, 5, 3], ‘best’: [9, 1, 3, 5]}
The maximum index assigned dictionary : {‘gfg’: 2, ‘is’: 1, ‘best’: 0}
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