On 02/07/2013 07:14 PM, Rick Johnson wrote: > So if you want to use "global variables" , (bka: Module level > variables), then simply declare them with a None value like this: > > globalVariable = None
This is a nice convention, but at best it's just a helpful notation that helps a programmer know something useful may likely be bound to this name in the future. The '=' sign in Python isn't an assignment operator, at least in this case; it's a binding operator. Thus any future line that sets globalVariable to something isn't assigning a value to this already-declared variable. Instead it's binding the name globalValue to a new object, and overwriting the name in the module dictionary. That's of course why the global keyword is required, so that Python will use the module dictionary instead of the local scope one. -- http://mail.python.org/mailman/listinfo/python-list
