ValueError: setting an array element with a sequence while creating n-dimentional array

Question

I want to create a n-dimentional numpy array. Following is my code

import numpy as np
random_weights = np.empty(3)
random_weights[0] = np.array([0,1,2])
random_weights[1] = np.array([3,4,5])

Above code gives me ValueError: setting an array element with a sequence. error. I am trying to create multi-dimentional array. What is the reason for this issue?

it is not the way i need to do it, i want to assign values on the fly — Malintha
– Malintha, Commented Feb 28, 2018 at 7:27

jsmolka · Accepted Answer · 2018-02-28 07:31:21Z

2

If you want a 2d array, you need to define it.

import numpy as np

random_weights = np.empty((2, 3))  # 2 rows, 3 columns
random_weights[0] = np.array([0,1,2])
random_weights[1] = np.array([3,4,5])

edited Feb 28, 2018 at 7:31

answered Feb 28, 2018 at 7:25

jsmolka

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1 Comment

hpaulj Over a year ago

This indexing could also be written as random_weights[0,:] = [0,1,2], emphasizing that it is filling in the 0'th row.

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