Imported globals?

Valentina Vaneeva fattie at tpu.ru
Fri Jul 27 19:30:37 CEST 2007


On Jul 27, 2007, at 10:56 PM, Gary Herron wrote:

> The variable "value" is global in module_a, and "change_value" will 
> always refer to that variable.
>
> However, in module_b, when you      from module_a import value, 
> change_value
> you have created two new variables global to module_b that references 
> values from the other module.
> Now running change_value (which changes "value" in module_a has no 
> affect on the version of "value" in module_b.   Your print is then 
> printing value from module_b -- the unchanged version.

Thank you, Gary, but I still have one question. What happens in the 
second case? If I add a call to change_value() to module_a, the value 
in module_b is imported changed. Why? What exactly does the import 
statement import in my example?

> Ideas:
> 1 If you want module_a to manage such a global variable, you could 
> include functions for getting, and setting it, as well as your 
> function for changing it's value.
>
> 2. You could also dispense with use of global values -- various OOP 
> techniques could help there.

Thanks, this part is not a problem :)


Cheers,
	Valia




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