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I want to add something to a ndarray, what am I doing wrong?

import numpy as np
sequence =np.repeat(1, 4)
print(sequence)
np.append(sequence, 7)
print(sequence)

Expected result in console: [1 1 1 1] [1 1 1 1 7]

Actual result: [1 1 1 1] [1 1 1 1]

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    sequence = np.append(sequence, 7) Commented Jan 8, 2021 at 21:38
  • 1
    It doesn't do it in-place, so you have to access the return value of np.append Commented Jan 8, 2021 at 21:39
  • np.append is not a list append clone. Do not use as such; better yet don't use it at all! Also you can't add an element to just one row of a 2d array. Again, arrays are not the same as nested lists. Commented Jan 8, 2021 at 21:58
  • It's not in-place! Of course! Thank you you guys! Commented Jan 9, 2021 at 0:01

1 Answer 1

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np.append() returns a new list, so what you wanna do is you wanna do sequence = np.append(sequence, 7)

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