PyMyth: Global variables are evil... WRONG!

[jongiddy]

On Tuesday, November 12, 2013 2:06:09 AM UTC, Rick Johnson wrote:

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>  Justifying Global Variables:
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> Globals are justified when they are used to communicate
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> information between scopes that otherwise were meant to be
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> mutually exclusive. One good example would be package sub-
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> modules.
> 

Can you please give an example where having a module provide a global variable would work better than any of:
1. providing a module function to change the operation of my module
2. providing a class with a method to change the operation of an instance
3. providing an additional parameter to module functions / instance methods to change operation
4. providing additional module functions / instance methods to perform different operations