How to convert a multidimensional array in Python into a one-dimensional array?

You can use the flatten() function in the numpy library to convert a multidimensional array into a one-dimensional array. An example is shown below:

import numpy as np

# 多维数组
multidimensional_array = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])

# 将多维数组转化为一维数组
onedimensional_array = multidimensional_array.flatten()

print(onedimensional_array)

The output is:

[1 2 3 4 5 6 7 8 9]