# Transpose Dual Tuple List in Python

• Last Updated : 01 Dec, 2021

Sometimes, while working with Python tuples, we can have a problem in which we need to perform tuple transpose of elements i.e, each column element of dual tuple becomes a row, a 2*N Tuple becomes N * 2 Tuple List. This kind of problem can have possible applications in domains such as web development and day-day programming. Let’s discuss certain ways in which this task can be performed.

```Input : test_list = [(2, 'Gfg'), (3, 'is'), (94, 'Best')]
Output : ([2, 3, 94], ['Gfg', 'is', 'Best'])
Input : test_list = [(8, 1)]
Output : ([8, 1])```

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### Method #1: Using loop

This is one of the ways in which this problem can be solved. In this, we employ a brute force strategy to perform the transpose by constructing 2 lists and combining them to get the transposed results.

## Python3

 `# Python3 code to demonstrate working of``# Transpose Tuple List``# Using loop` `# hlper_fnc function``def` `hlper_fnc(test_list):``    ``# declare empty list``    ``sub1 ``=` `[]``    ``sub2 ``=` `[]` `    ``res ``=` `(sub1, sub2)``    ``for` `sub ``in` `test_list:``        ``# add element in the last of the list``        ``sub1.append(sub[``0``])``        ``sub2.append(sub[``1``])` `    ``return` `res` `# initializing list``test_list ``=` `[(``5``, ``1``), (``3``, ``4``), (``9``, ``7``), (``10``, ``6``)]` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))` `# Transpose Tuple List``# Using loop``res ``=` `hlper_fnc(test_list)` `# printing result``print``(``"The transposed tuple list : "` `+` `str``(res))`

Output:

```The original list is : [(5, 1), (3, 4), (9, 7), (10, 6)]
The transposed tuple list : ([5, 3, 9, 10], [1, 4, 7, 6])```

### Method #2 : Using loop + zip() + tuple()

The combination of above functionalities can also be used to solve this problem. In this, we perform the task of forming transpose and extract columnar elements using zip().

## Python3

 `# Python3 code to demonstrate working of``# Transpose Tuple List``# Using zip() + tuple()` `# hlper_fnc function``def` `hlper_fnc(test_list):``    ``return` `tuple``(``zip``(``*``test_list))` `# initializing list``test_list ``=` `[(``5``, ``1``), (``3``, ``4``), (``9``, ``7``), (``10``, ``6``)]` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))` `# Transpose Tuple List``# Using zip() + tuple()``sub1, sub2 ``=` `hlper_fnc(test_list)``res ``=` `(``list``(sub1), ``list``(sub2))` `# printing result``print``(``"The transposed tuple list : "` `+` `str``(res))`

Output:

```The original list is : [(5, 1), (3, 4), (9, 7), (10, 6)]
The transposed tuple list : ([5, 3, 9, 10], [1, 4, 7, 6])```

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