Why am i getting a type error?

[NET-OF-BEING]

Im using python 3.6.5 and receiving the following Error.

Traceback (most recent call last):
File "conway.py", line 40, in
A = conway(A)
File "conway.py", line 16, in conway
k[m/2-1 : m/2+2, n/2-1 : n/2+2] = np.array([[1,1,1],[1,0,1],[1,1,1]])
TypeError: slice indices must be integers or None or have an index method

[wsyxbcl]

Im using python 3.6.5 and receiving the following Error.

Traceback (most recent call last):
File "conway.py", line 40, in
A = conway(A)
File "conway.py", line 16, in conway
k[m/2-1 : m/2+2, n/2-1 : n/2+2] = np.array([[1,1,1],[1,0,1],[1,1,1]])
TypeError: slice indices must be integers or None or have an index method

Since slice indices should be integers here, changing '/' to '//' here will fix the issue.
k[m//2-1 : m//2+2, n//2-1 : n//2+2] = np.array([[1,1,1],[1,0,1],[1,1,1]])