Swapping Columns with NumPy arrays

Question

When I have a=1 and b=2, I can write a,b=b,a so that a and b are interchanged with each other.

I use

Answer 1

if you need to swap the mth and the nth rows, you could you the following code:

temp = a[m,:].copy()
a[m,:]  = a[n,:]
a[n,:] =  temp

you can extrapolate the same concept for swapping the columns by changing the indices.