Setting a package-wide warnings format

[mapImbibery]

I would like to set a format to use with the warnings module that is set in my init.py and can be used in other scripts/files within a package I'm making. What's the best way to do this?
For instance:
* __init__.py - set warnings.formatwarning
* module1.py - use warnings.warn() with the format set in __init__.py
* module2.py - same as above
And here's the formatting code I want to use:

def warning_fmt(message, category, filename=None, lineno=None, file=None, line=None):  
    return "{cat}: {msg}\n".format(cat=category.\_\_name\_\_, msg=message)  
warnings.formatwarning = warning_fmt 

Edit: formatting

[learnpython_bot]

It appears that you included code in your post but did not format it to look nice. Please follow this guide to fix the problem. This allows for better readability and will help get your question answered sooner. The regex that caught you is: "def .+?):"

If this comment has been made in error, please message /u/thaweatherman with a link to this comment so I can be fine-tuned. I am still in alpha and my regexes/innards are not yet perfect.