numpy.put — NumPy v2.2 Manual (original) (raw)

numpy.put(a, ind, v, mode='raise')[source]#

Replaces specified elements of an array with given values.

The indexing works on the flattened target array. put is roughly equivalent to:

Parameters:

andarray

Target array.

indarray_like

Target indices, interpreted as integers.

varray_like

Values to place in a at target indices. If v is shorter than_ind_ it will be repeated as necessary.

mode{‘raise’, ‘wrap’, ‘clip’}, optional

Specifies how out-of-bounds indices will behave.

• ‘raise’ – raise an error (default)
• ‘wrap’ – wrap around
• ‘clip’ – clip to the range

‘clip’ mode means that all indices that are too large are replaced by the index that addresses the last element along that axis. Note that this disables indexing with negative numbers. In ‘raise’ mode, if an exception occurs the target array may still be modified.

Examples

import numpy as np a = np.arange(5) np.put(a, [0, 2], [-44, -55]) a array([-44, 1, -55, 3, 4])

a = np.arange(5) np.put(a, 22, -5, mode='clip') a array([ 0, 1, 2, 3, -5])