numpy.ndarray.flatten() in Python

numpy.ndarray.flatten() in Python

The numpy.ndarray.flatten() returns a copy of the array collapsed into 1-dimension.

Syntax

ndarray.flatten(order='C')

Parameter

The numpy. ndarray.flatten() method consists of one parameter, which is as follows:

order : This parameter can be either C_contiguous or F_contiguous where C order operates row-rise on the array, and  F order operates column-wise operations.

Return

This function returns a copy of the input array, flattened to one dimension.

Example 1

# Python Program explaining
# numpy.ndarray.flatten() function
import numpy as np 
arr = np.arange(12).reshape(3,4)
print ('Original array:' )
print (arr)
# default is column-major
print ('The flattened array:' )
print (arr.flatten() )
print ('The flattened array in F-style ordering:')
print (arr.flatten(order = 'F'))

Output

Original array:
[[ 0  1  2  3]
[ 4  5  6  7]
[ 8  9 10 11]]
The flattened array:
[ 0  1  2  3  4  5  6  7  8  9 10 11]
The flattened array in F-style ordering:
[ 0  4  8  1  5  9  2  6 10  3  7 11]