Andrew Athan writes:

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... _stateVariable=0 ..... class .... def fun() .... _stateVariable=1

and this was causing me all kinds of grief. By changing the code to

_stateVariable = {'a':0} .... class ... def fun() ... _stateVariable['a']=1

everything works just fine. Now, can someone give me the shortcut to understand WHHHYYY? When Python sees an assignment to a *variable*, it assumes you want to define a new *local* variable. You must explicitly declare it "global" to be able to change the value of a global variable from a local context.

In the second case, you do not assign to a variable, but modify an object (leaving all variable binding unchanged). Dieter