Python operates matrix rows and columns

This time I will bring you python to operate matrix rows and columns. What are the precautions for python to operate matrix rows and columns? Here are practical cases, let’s take a look.

Add rows to a matrix

np.row_stack() 与 np.column_stack()
import numpy as np
a = np.array([[4, 4,], [5, 5]])
c = np.row_stack((a, [8,9]))
d = np.column_stack((a, [8,9]))

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How does Python Unittest perform automated unit testing

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