# Python – Maximum of K element in other list

• Last Updated : 09 Jun, 2021

Given two lists, extract maximum of elements with similar K in corresponding list.

Input : test_list1 = [4, 3, 6, 2, 8], test_list2 = [3, 6, 3, 4, 3], K = 3
Output : 8
Explanation : Elements corresponding to 3 are, 4, 6, and 8, Max. is 8.
Input : test_list1 = [10, 3, 6, 2, 8], test_list2 = [5, 6, 5, 4, 5], K = 5
Output : 10
Explanation : Elements corresponding to 5 are, 10, 6, and 8, Max. is 10.

Method #1 : Using loop + max()

In this, we extract all elements from list 1 which are equal to K in list 2, and then perform max() to get maximum of them.

## Python3

 `# Python3 code to demonstrate working of``# Maximum of K element in other list``# Using loop + max()` `# initializing lists``test_list1 ``=` `[``4``, ``3``, ``6``, ``2``, ``9``]``test_list2 ``=` `[``3``, ``6``, ``3``, ``4``, ``3``]` `# printing original lists``print``(``"The original list 1 is : "` `+` `str``(test_list1))``print``(``"The original list 2 is : "` `+` `str``(test_list2))` `# initializing K``K ``=` `3` `res ``=` `[]``for` `idx ``in` `range``(``len``(test_list1)):``    ` `    ``# checking for K in 2nd list``    ``if` `test_list2[idx] ``=``=` `K :``        ``res.append(test_list1[idx])` `# getting Maximum element``res ``=` `max``(res)` `# printing result``print``(``"Extracted Maximum element : "` `+` `str``(res))`

Output

```The original list 1 is : [4, 3, 6, 2, 9]
The original list 2 is : [3, 6, 3, 4, 3]
Extracted Maximum element : 9```

Method #2 : list comprehension + max() + zip()

In this, we perform task of pairing elements using zip() and is one-liner solution provided using list comprehension.

## Python3

 `# Python3 code to demonstrate working of``# Maximum of K element in other list``# Using list comprehension + max() + zip()` `# initializing lists``test_list1 ``=` `[``4``, ``3``, ``6``, ``2``, ``9``]``test_list2 ``=` `[``3``, ``6``, ``3``, ``4``, ``3``]` `# printing original lists``print``(``"The original list 1 is : "` `+` `str``(test_list1))``print``(``"The original list 2 is : "` `+` `str``(test_list2))` `# initializing K``K ``=` `3` `# one liner to solve this problem``res ``=` `max``([sub1 ``for` `sub1, sub2 ``in` `zip``(test_list1, test_list2) ``if` `sub2 ``=``=` `K])` `# printing result``print``(``"Extracted Maximum element : "` `+` `str``(res))`

Output

```The original list 1 is : [4, 3, 6, 2, 9]
The original list 2 is : [3, 6, 3, 4, 3]
Extracted Maximum element : 9```

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