Mark Roseman added the comment:

Exactly. The "querydialog" code (which will replace the simpledialog 
askstring/askinteger calls) displays errors as shown in querydialog.png, with 
the error messages disappearing as soon as you hit another key.

You can also pass in a 'validator' to check if the input is ok, so in this case 
it would check if the module could be loaded and return the appropriate message 
if not.

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Added file: http://bugs.python.org/file40175/querydialog.png

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