Question

How to convert a list of numpy arrays into a list in Python

Answer 1

import numpy as np

arr = [np.array([1,2,3]), np.array([4,5,6]), np.array([7,8,9])]

lst = list(np.hstack(arr))

print(lst)





'''
run:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

'''

 

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Answer 2

import numpy as np

arr = [np.array([1,2,3]), np.array([4,5,6]), np.array([7,8,9])]

lst = list(np.concatenate(arr, axis=0))

print(lst)





'''
run:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

'''

 

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Answer 3

import numpy as np

arr = [np.array([1,2,3]), np.array([4,5,6]), np.array([7,8,9])]

lst = list(np.array(arr).flatten())

print(lst)





'''
run:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

'''

 

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