import numpy as np

# Create the initial ndarray x

x $=$ np$.$arange$(15,$ dtype$=$np$.$float$32).$reshape$(3,5)$

# Modify the data in x to match the diagram

x$[1,2]=-8\mathrm{.}0$

x$[1,3]=-3\mathrm{.}0$

x$[2,0]=-7\mathrm{.}0$

x$[2,1]=-2\mathrm{.}0$

# Create ndarray y as a view into x

y $=$ x$[1$:$,2$:$4].$copy$()$

# Create ndarray z as a copy of y

z $=$ y$.$copy$()$