Related Articles
Python – Resize Keys in dictionary
• Last Updated : 16 Nov, 2020

Given Dictionary, resize keys to K by getting starting k elements from keys.

Input : test_dict = {“geeksforgeeks” :3, “best” :3, “coding” :4, “practice” :3}, K = 3
Output : {‘gee’: 3, ‘bes’: 3, ‘cod’: 4, ‘pra’: 3}
Explanation : Keys resized to have 3 elements.

Input : test_dict = {“geeksforgeeks” :3, “best” :3, “coding” :4, “practice” :3}, K = 4
Output : {‘geek’: 3, ‘best’: 3, ‘codi’: 4, ‘prac’: 3}
Explanation : Keys resized to have 4 elements.

Method #1 : Using slicing + loop

In this, resizing is done using slicing of dictionary keys, loop is used to iterate for all the keys of dictionary.

## Python3

 `# Python3 code to demonstrate working of``# Resize Keys in dictionary``# Using slicing + loop`` ` `# initializing dictionary``test_dict ``=` `{``"geeksforgeeks"``: ``3``, ``"best"``: ``3``, ``"coding"``: ``4``, ``"practice"``: ``3``}`` ` `# printing original dictionary``print``(``"The original dictionary is : "` `+` `str``(test_dict))`` ` `# initializing K``K ``=` `2`` ` `# reforming dictionary``res ``=` `dict``()``for` `key ``in` `test_dict:`` ` `    ``# resizing to K prefix keys``    ``res[key[:K]] ``=` `test_dict[key]`` ` `# printing result``print``(``"The required result : "` `+` `str``(res))`

Output:

The original dictionary is : {‘geeksforgeeks’: 3, ‘best’: 3, ‘coding’: 4, ‘practice’: 3}
The required result : {‘ge’: 3, ‘be’: 3, ‘co’: 4, ‘pr’: 3}

Method #2 : Using dictionary comprehension + slicing

In this, we perform task of reforming dictionary in one liner using dictionary comprehension.

## Python3

 `# Python3 code to demonstrate working of``# Resize Keys in dictionary``# Using dictionary comprehension + slicing`` ` `# initializing dictionary``test_dict ``=` `{``"geeksforgeeks"``: ``3``, ``"best"``: ``3``, ``"coding"``: ``4``, ``"practice"``: ``3``}`` ` `# printing original dictionary``print``(``"The original dictionary is : "` `+` `str``(test_dict))`` ` `# initializing K``K ``=` `2`` ` `# reforming dictionary``res ``=` `{key[:K]: test_dict[key] ``for` `key ``in` `test_dict}`` ` `# printing result``print``(``"The required result : "` `+` `str``(res))`

Output:

The original dictionary is : {‘geeksforgeeks’: 3, ‘best’: 3, ‘coding’: 4, ‘practice’: 3}
The required result : {‘ge’: 3, ‘be’: 3, ‘co’: 4, ‘pr’: 3}

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.

My Personal Notes arrow_drop_up