[Python-Dev] Proposed Python api for testing whether a module exists

[Edward Loper]

> I propose to add the following function to the imp module:
> 
>   exists(module_name)
> 
>      Test whether the named module can be found.  [...]
>      If a dotted module name is given, then parent modules will be
>      imported if they haven't already been imported.

If a parent module doesn't exist, will it return False or raise an 
ImportError?

-Edward