SwapRows - Indent issue

A_system = SwapRows((A_system,0,1))
print(A_system)

This is returning File “”, line 2
A_system = SwapRows((A_system,0,1))
^
IndentationError: unexpected indent

This means that your code “A_system = …” isn’t using the expected indentation. This may point to an error in the previous lines of code. Or maybe you’re indenting something that you shouldn’t.