import numpy as np

grid = np.array([[10, 20, 30], [40, 50, 60]])

flat = grid.flatten()

print("original shape:", grid.shape)
print("flattened shape:", flat.shape)
print("row-major:", flat.tolist())

column_major = grid.flatten(order="F")
print("column-major:", column_major.tolist())

flat[0] = -1
print("flatten shares memory:", np.shares_memory(grid, flat))
print("source after edit:", grid.tolist())