Syntax
- global a, b, c
- nonlocal a, b
- x = something # binds x
- (x, y) = something # binds x and y
- x += something # binds x. Similarly for all other "op="
- del x # binds x
- for x in something: # binds x
- with something as x: # binds x
- except Exception as ex: # binds ex inside block