# Python – Associated Values Frequencies in Dictionary

• Last Updated : 22 Apr, 2020

Sometimes, while working with dictionaries, we can have problem in which we need to compute the values associated to each value in dictionary in records list. This kind of problem is peculiar, but can have application in development domains. Lets discuss certain way in which this task can be performed.

Method : Using nested `defaultdict() + Counter()`
The combination of above functions can be used to solve this problem. In this, we use nested defaultdict to keep track of elements and counting of elements is done by Counter().

 `# Python3 code to demonstrate working of ``# Associated Values Frequencies in Dictionary``# Using defaultdict() + Counter()``from` `collections ``import` `defaultdict, Counter`` ` `# initializing list``test_list ``=` `[{``'gfg'` `: ``1``, ``'is'` `: ``3``, ``'best'` `: ``4``},``             ``{``'gfg'` `: ``3``, ``'is'` `: ``2``, ``'best'` `: ``4``}, ``             ``{``'gfg'` `: ``3``, ``'is'` `: ``5``, ``'best'` `: ``2``},``             ``{``'gfg'` `: ``5``, ``'is'` `: ``2``, ``'best'` `: ``1``},``             ``{``'gfg'` `: ``2``, ``'is'` `: ``4``, ``'best'` `: ``3``},``             ``{``'gfg'` `: ``1``, ``'is'` `: ``3``, ``'best'` `: ``5``},``             ``{``'gfg'` `: ``1``, ``'is'` `: ``3``, ``'best'` `: ``2``}]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# Associated Values Frequencies in Dictionary``# Using defaultdict() + Counter()``res ``=` `defaultdict(Counter)``for` `sub ``in` `test_list:``    ``for` `key, val ``in` `sub.items():``        ``res[key][val] ``+``=` `1`` ` `# printing result ``print``(``"The list after Frequencies : "` `+` `str``(``dict``(res))) `
Output :

The original list is : [{‘gfg’: 1, ‘is’: 3, ‘best’: 4}, {‘gfg’: 3, ‘is’: 2, ‘best’: 4}, {‘gfg’: 3, ‘is’: 5, ‘best’: 2}, {‘gfg’: 5, ‘is’: 2, ‘best’: 1}, {‘gfg’: 2, ‘is’: 4, ‘best’: 3}, {‘gfg’: 1, ‘is’: 3, ‘best’: 5}, {‘gfg’: 1, ‘is’: 3, ‘best’: 2}]
The list after Frequencies : {‘gfg’: Counter({1: 3, 3: 2, 2: 1, 5: 1}), ‘is’: Counter({3: 3, 2: 2, 4: 1, 5: 1}), ‘best’: Counter({2: 2, 4: 2, 1: 1, 3: 1, 5: 1})}

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