.transpose()

The .transpose() method reverses or permutes the axes of an ndarray.

Syntax

numpy.transpose(axes)

Where axes is a tuple or list with as many entries as there are dimensions, listing the 0-based indices of each index in the new order in which they’ll appear in the permuted array. If axes is omitted, .transpose() will reverse the order of axes.

Unlike the built-in numpy.transpose() function, the numpy.ndarray.transpose() method can accept the axes as separate arguments, as well as in the form of a tuple (i.e., array.transpose(2,0,1) is the same as array.transpose((2,0,1))).

If possible, the ndarray returned will be a view of the original ndarray‘s data.

Example

The below example creates an ndarray and then uses .transpose() on it.

import numpy as np

nd1 = np.array([[1,2,3],[4,5,6]])

print(nd1)
print(nd1.transpose())

This produces the following output:

[[1 2 3]
 [4 5 6]]

[[1 4]
 [2 5]
 [3 6]]