Handle exceptions helper in IDE or with a external tool
In PHPStorm, a very usefull feature is to alert when an exception is not handled on a function.
It is a recursive feature, as it scan deep in function calls to let you choose on which level you want to catch the exception.
To help the user, the IDE suggest to add an annotation in the function docstring if it raise an exception.
But in Python, this is not as easy :
May be abandon that, or create a new PEP ? ;-)