# numpy.append () in Python

numpy.append (array, values, axis = none): adds values ​​along the specified axis at the end of the array
Parameters:

`  array:  [array_like] Input array.  values:  [array_like] values ​​to be added in the arr. Values ​​should be shaped so that arr [..., obj, ...] = values. If the axis is defined values ​​can be of any shape as it will be flattened before use.  axis:  Axis along which we want to insert the values. By default, array is flattened. `

Return:

` An copy of array with values ​​being appended at the end as per the mentioned object along a given axis. `

 ` # Python program illustrating ` ` # numpy.append () `   ` import ` ` numpy as geek ` ` `  ` # Working on 1D ` ` arr1 ` ` = ` ` geek.arange (` ` 5 ` `) ` ` print ` ` (` `" 1D arr1: "` `, arr1) ` ` print ` ` (` ` "Shape:" ` `, arr1.shape) ` ` `  ` `  ` arr2 ` ` = ` ` geek.arange (` ` 8 ` `, ` ` 12 ` `) ` ` print ` ` (` ` "1D arr2:" ` `, arr2) ` ` print ` ` (` ` "Shape:" ` ` , arr2.shape) `     ` # adding arrays ` ` arr3 ` ` = ` ` geek.append (arr1, arr2) ` ` print ` ` ( ` ` "Appended arr3:" ` `, arr3) `

Output:

` 1D arr1: [0 1 2 3 4] Shape: (5,) 1D arr2: [8 9 10 11] Shape: (4,) Appended arr3: [0 1 2 3 4 8 9 10 11] `

Code 2: Axis game

Output:

` 2D arr1: [[0 1 2 3] [4 5 6 7]] Shape: (2, 4) 2D arr2: [[8 9 10 11] [12 13 14 15]] Shape: (2, 4) Appended arr3 by flattened: [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] Appended arr3 with axis 0: [[0 1 2 3] [4 5 6 7] [8 9 10 11] [12 13 14 15]] Appended arr3 with axis 1: [[0 1 2 3 8 9 10 11] [4 5 6 7 12 13 14 15]] `

 ` # Python program illustrating ` ` # numpy.append () `   ` import ` ` numpy as geek ` ` `  ` # Working on 1D ` ` arr1 ` ` = ` ` geek.arange (` ` 8 ` `). reshape (` ` 2 ` `, ` ` 4 ` `) ` print ` (` ` "2D arr1:" ` ` , arr1) ` ` print ` ` (` ` "Shape : "` `, arr1.shape) ` ` `    ` arr2 ` ` = ` ` geek.arange (` ` 8 ` `, ` ` 16 ` `). reshape (` ` 2 ` `, ` ` 4 ` `) ` ` print ` ` (` ` "2D arr2:" ` `, arr2) ` ` print ` ` (` ` "Shape:" ` `, arr2.shape) `     ` # adding arrays ` ` arr3 ` ` = ` ` geek.append (arr1, arr2) ` ` print ` ` (` ` "Appended arr3 by flattened:" ` `, arr3) `   ` # adding arrays with axis = 0 ` ` arr3 ` ` = ` ` geek.append (arr1, arr2, axis ` ` = ` ` 0 ` `) ` ` print ` ` (` ` "Appended arr3 with axis 0:" ` `, arr3) `  < br /> ` # adding arrays with axis = 1 ` ` arr3 ` ` = ` ` geek.append (arr1, arr2, axis ` ` = ` ` 1 ` `) ` ` print ` ` (` ` "Appended arr3 with axis 1:" ` `, arr3) `