Question about types and py2 to py3 diffrences

[Vysero]

Yes, you showed good use of is. When I say type checking is discouraged, I mean using type(x) == blah. Using is with an object (None) is very normal. (When you really need it, isinstance is used instead.)

Okay I think I understand. I sort of understand when I would use isinstance, I think:

    if isinstance(loc,LatLong):
      loc = loc.UTM()

as opposed to:

if type(loc) == types.InstanceType and loc.__class__ == LatLong:
            loc = loc.UTM()