Flatten List in Python usando Numpy Flat
import numpy as np
List = np.array([[1,2,3], [4,5,6], [7,8,9]])
print(list(List.flat))
Outrageous Ostrich
import numpy as np
List = np.array([[1,2,3], [4,5,6], [7,8,9]])
print(list(List.flat))