Python – Remove Kth key from dictionary

Many times, while working with Python, we can have a situation in which we require to remove the Kth key of the dictionary. This is useful for Python version 3.8 +, where key ordering is similar to the insertion order. Let’s discuss certain ways in which this task can be performed.

Examples:

Input : test_dict = {“Gfg” : 20, “is” : 36, “best” : 100, “for” : 17, “geeks” : 1} , K = 4
Output : {‘Gfg’: 20, ‘is’: 36, ‘best’ : 100, ‘geeks’: 1}
Explanation : 4th index, for is removed.

Input : test_dict = {“Gfg” : 20, “is” : 36, “best” : 100, “for” : 17, “geeks” : 1} , K = 2
Output : {‘Gfg’: 20, ‘best’ : 100, ‘for’ : 17, ‘geeks’: 1}
Explanation : 2nd index, ‘is’ is removed.

Method #1 : Using del + loop

This is one of the ways in which this task can be performed. In this, we iterate for the keys, along with the counter, when we get the key, we perform its removal. This performs inplace removal.

Python3

 `# Python3 code to demonstrate working of  ` `# Remove Kth key from dictionary ` `# Using loop ` ` `  `# initializing dictionary ` `test_dict ``=` `{``"Gfg"` `: ``20``, ``"is"` `: ``36``, ``"best"` `: ``100``, ` `             ``"for"` `: ``17``, ``"geeks"` `: ``1``}  ` ` `  `# printing original dictionary ` `print``(``"The original dictionary is : "` `+` `str``(test_dict)) ` ` `  `# initializing size  ` `K ``=` `3` ` `  `cnt ``=` `0` `for` `key ``in` `test_dict: ` `    ``cnt ``+``=` `1` `     `  `    ``# delete key if counter is equal to K ` `    ``if` `cnt ``=``=` `K: ` `        ``del` `test_dict[key] ` `        ``break` `     `  `# printing result  ` `print``(``"Required dictionary after removal : "` `+` `str``(test_dict))  `

Output:

The original dictionary is : {‘Gfg’: 20, ‘is’: 36, ‘best’: 100, ‘for’: 17, ‘geeks’: 1}
Required dictionary after removal : {‘Gfg’: 20, ‘is’: 36, ‘for’: 17, ‘geeks’: 1}

Method #2 : Using keys() + dictionary comprehension

This is yet another way in which this task can be performed. In this, we recreate the dictionary without including the required key, by extracting key to be removed using keys(), we include all keys except required into new dictionary.

Python3

 `# Python3 code to demonstrate working of  ` `# Remove Kth key from dictionary ` `# Using Remove Kth key from dictionary ` ` `  `# initializing dictionary ` `test_dict ``=` `{``"Gfg"` `: ``20``, ``"is"` `: ``36``, ``"best"` `: ``100``, ` `             ``"for"` `: ``17``, ``"geeks"` `: ``1``}  ` ` `  `# printing original dictionary ` `print``(``"The original dictionary is : "` `+` `str``(test_dict)) ` ` `  `# initializing size  ` `K ``=` `3` ` `  `# dictionary comprehension remakes dictionary,  ` `# rather than removing ` `res ``=` `{key: val ``for` `key, val ``in` `test_dict.items()  ` `       ``if` `key !``=` `list``(test_dict.keys())[K ``-` `1``]} ` `     `  `# printing result  ` `print``(``"Required dictionary after removal : "` `+` `str``(res))`

Output:

The original dictionary is : {‘Gfg’: 20, ‘is’: 36, ‘best’: 100, ‘for’: 17, ‘geeks’: 1}
Required dictionary after removal : {‘Gfg’: 20, ‘is’: 36, ‘for’: 17, ‘geeks’: 1}

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