convert this new matrix to a one dimensional array (also called vector) in python

main.py
import numpy as np

# Create a new matrix
matrix = np.array([[1, 2, 3],
                   [4, 5, 6],
                   [7, 8, 9]])

# Convert the matrix to a one-dimensional array
vector = matrix.flatten()

print(vector)
223 chars
12 lines

main.py
array([1, 2, 3, 4, 5, 6, 7, 8, 9])
35 chars
2 lines