Given Dual Tuples List, remove pairs with difference greater than K.

Input: test_list = [(4, 8), (1, 7), (9, 12), (3, 12), (2, 10)], K = 6Output: [(4, 8), (9, 12), (1, 7)]Explanation: 4 (8 – 4), 3 (12 – 9) and 6 are all not greater than 6, hence retained.

Input: test_list = [(4, 8), (1, 7), (9, 12), (3, 12), (2, 10)], K = 3Output: [(9, 12)]Explanation: 3 (12 – 9) is not greater than 3, hence retained.

**Method #1 : Using list comprehension**

In this, we perform filtering by testing the absolute difference using *abs()*, if found smaller than K, its retained, hence greater than K difference tuples are removed.

## Python3

`# Python3 code to demonstrate working of` `# Remove Tuples with difference greater than K` `# Using list comprehension` ` ` `# initializing list` `test_list ` `=` `[(` `4` `, ` `8` `), (` `1` `, ` `7` `), (` `9` `, ` `12` `), (` `3` `, ` `12` `), (` `2` `, ` `10` `)]` ` ` `# printing original list` `print` `(` `"The original list is : "` `+` `str` `(test_list))` ` ` `# initializing K` `K ` `=` `5` ` ` `# filtering using list comprehension, checking for smaller than K diff.` `res ` `=` `[sub ` `for` `sub ` `in` `test_list ` `if` `abs` `(sub[` `0` `] ` `-` `sub[` `1` `]) <` `=` `K]` ` ` `# printing result` `print` `(` `"Tuples List after removal : "` `+` `str` `(res))` |

**Output:**

The original list is : [(4, 8), (1, 7), (9, 12), (3, 12), (2, 10)]

Tuples List after removal : [(4, 8), (9, 12)]

**Method #2 : Using filter() + lambda + abs()**

In this, task of filtering is performed using *filter()* and *lambda* function, *abs()* is used to get the absolute difference.

## Python3

`# Python3 code to demonstrate working of` `# Remove Tuples with difference greater than K` `# Using filter() + lambda + abs()` ` ` `# initializing list` `test_list ` `=` `[(` `4` `, ` `8` `), (` `1` `, ` `7` `), (` `9` `, ` `12` `), (` `3` `, ` `12` `), (` `2` `, ` `10` `)]` ` ` `# printing original list` `print` `(` `"The original list is : "` `+` `str` `(test_list))` ` ` `# initializing K` `K ` `=` `5` ` ` `# Using filter() and lambda function for filtering` `res ` `=` `list` `(` `filter` `(` `lambda` `sub: ` `abs` `(sub[` `0` `] ` `-` `sub[` `1` `]) <` `=` `K, test_list))` ` ` `# printing result` `print` `(` `"Tuples List after removal : "` `+` `str` `(res))` |

**Output:**

The original list is : [(4, 8), (1, 7), (9, 12), (3, 12), (2, 10)]

Tuples List after removal : [(4, 8), (9, 12)]

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