# Python | Transpose elements of two dimensional list

Given a two-dimensional list of integers, write a Python program to get the transpose of given list of lists.

In Python, a matrix can be interpreted as a list of lists. Each element is treated as a row of the matrix. For example m = [[10, 20], [40, 50], [30, 60]] represents a matrix of 3 rows and 2 columns. First element of the list – m[0] and element in first row, first column – m[0][0].

Example:

```Input :  l1 = [[4, 5, 3, 9],
[7, 1, 8, 2],
[5, 6, 4, 7]]

Output : lt = [[4, 7, 5],
[5, 1, 6],
[3, 8, 4],
[9, 2, 7]]
```

Method #1: Using loops

 `# Python program to get transpose ` `# elements of two dimension list ` `def` `transpose(l1, l2): ` ` `  `    ``# iterate over list l1 to the length of an item  ` `    ``for` `i ``in` `range``(``len``(l1[``0``])): ` `        ``# print(i) ` `        ``row ``=``[] ` `        ``for` `item ``in` `l1: ` `            ``# appending to new list with values and index positions ` `            ``# i contains index position and item contains values ` `            ``row.append(item[i]) ` `        ``l2.append(row) ` `    ``return` `l2 ` ` `  `# Driver code  ` `l1 ``=` `[[``4``, ``5``, ``3``, ``9``], [``7``, ``1``, ``8``, ``2``], [``5``, ``6``, ``4``, ``7``]] ` `l2 ``=` `[] ` `print``(transpose(l1, l2)) `

Output:

```[[4, 7, 5], [5, 1, 6], [3, 8, 4], [9, 2, 7]]
```

Method #2: Using List comprehensions

 `# Python program to get transpose ` `# elements of two dimension list ` `def` `transpose(l1, l2): ` ` `  `    ``# we have nested loops in comprehensions ` `    ``# value of i is assigned using inner loop ` `    ``# then value of item is directed by row[i] ` `    ``# and appended to l2 ` `    ``l2 ``=``[[row[i] ``for` `row ``in` `l1] ``for` `i ``in` `range``(``len``(l1[``0``]))] ` `    ``return` `l2 ` ` `  `# Driver code  ` `l1 ``=` `[[``4``, ``5``, ``3``, ``9``], [``7``, ``1``, ``8``, ``2``], [``5``, ``6``, ``4``, ``7``]] ` `l2 ``=` `[] ` `print``(transpose(l1, l2)) `

Output:

```[[4, 7, 5], [5, 1, 6], [3, 8, 4], [9, 2, 7]]
```

Method #3: Using numpy

 `# Python program to get transpose ` `# elements of two dimension list ` `import` `numpy  ` `  `  `l1``=` `[[``4``, ``5``, ``3``, ``9``], [``7``, ``1``, ``8``, ``2``], [``5``, ``6``, ``4``, ``7``]] ` `print``(numpy.transpose(l1))  `

Output:

```[[4 7 5]
[5 1 6]
[3 8 4]
[9 2 7]]
```

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