import numpy as np
Creating a sample numpy array (in 1D)
ary = np.arange(1, 25, 1)
Converting the 1 Dimensional array to a 2D array
(to allow explicitly column and row operations)
ary = ary.reshape(5, 5)
Displaying the Matrix (use print(ary) in IDE)
print(ary)文章来源：https://www.toymoban.com/news/detail-815718.html
This for loop will iterate over all columns of the array one at a time
for col in range(ary.shape[1]):
print(ary[:, col])文章来源地址https://www.toymoban.com/news/detail-815718.html
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