PyMyth: Global variables are evil... WRONG!

[Chris Angelico]

On Sat, Nov 16, 2013 at 3:01 PM, Rick Johnson
<rantingrickjohnson at gmail.com> wrote:
> Because when i see code that accesses a variable like this:
>
>     var = value
>
> I have no way of knowing whether the mutation is happening
> to a local variable, a module level variable, or even a true
> global level variable (one which extends beyond the
> containing module).

If it's in a function, and there's no global/nonlocal declaration,
it's local. Otherwise, it's module level. It can't be process-level in
Python, so you don't need to worry about that.

It doesn't get much simpler than that without variable declarations
(in which case it's "scan surrounding scopes till you find a
declaration, that's it" - and it's arguable whether that's simpler or
not). Really Rick, you're clutching at straws here.

ChrisA