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Python – 3D Matrix to Coordinate List
• Last Updated : 02 Sep, 2020

Given a Matrix, row’s each element is list, pair each column to form coordinates.

Input : test_list = [[[9, 2], [10, 3]], [[13, 6], [19, 7]]]
Output : [(9, 10), (2, 3), (13, 19), (6, 7)]
Explanation : Column Mapped Pairs.

Input : test_list = [[[13, 6], [19, 7]]]
Output : [(13, 19), (6, 7)]
Explanation : Column Mapped Pairs.

Method #1 : Using loop + zip()

In this, we iterate for all the paired elements in inner tuples list, which is paired using zip(), and append the result list.

## Python3

 `# Python3 code to demonstrate working of ``# 3D Matrix to Coordinate List``# Using loop + zip()`` ` `# initializing list``test_list ``=` `[[[``5``, ``6``, ``7``], [``2``, ``4``, ``6``]], [[``9``, ``2``], [``10``, ``3``]], [[``13``, ``6``], [``19``, ``7``]]]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `res ``=` `[]``for` `sub1, sub2 ``in` `test_list:``     ` `    ``# zip() used to form pairing``    ``for` `ele ``in` `zip``(sub1, sub2):``        ``res.append(ele)`` ` `# printing result ``print``(``"Constructed Pairs : "` `+` `str``(res))`
Output
```The original list is : [[[5, 6, 7], [2, 4, 6]], [[9, 2], [10, 3]], [[13, 6], [19, 7]]]
Constructed Pairs : [(5, 2), (6, 4), (7, 6), (9, 10), (2, 3), (13, 19), (6, 7)]
```

Method #2 : Using list comprehension

In this, we perform task of of above method in shorthand using list comprehension.

## Python3

 `# Python3 code to demonstrate working of ``# 3D Matrix to Coordinate List``# Using loop + zip()`` ` `# initializing list``test_list ``=` `[[[``5``, ``6``, ``7``], [``2``, ``4``, ``6``]], [[``9``, ``2``], [``10``, ``3``]], [[``13``, ``6``], [``19``, ``7``]]]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# list comprehension to perform task in shorthand``res ``=` `[ele ``for` `sub1, sub2 ``in` `test_list ``for` `ele ``in` `zip``(sub1, sub2)]`` ` `# printing result ``print``(``"Constructed Pairs : "` `+` `str``(res))`
Output
```The original list is : [[[5, 6, 7], [2, 4, 6]], [[9, 2], [10, 3]], [[13, 6], [19, 7]]]
Constructed Pairs : [(5, 2), (6, 4), (7, 6), (9, 10), (2, 3), (13, 19), (6, 7)]
```

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