Conditional based on whether or not a module is being used

[Steve Holden]

Pete Emerson wrote:
> In a module, how do I create a conditional that will do something
> based on whether or not another module has been loaded?
> 
> Suppose I have the following:
> 
> import foo
> import foobar
> 
> print foo()
> print foobar()
> 
By the way, the above statements are never going to work, because
modules aren't callable. Maybe you want

print foo.foo()
print foobar.foobar()

regards
 Steve
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