Interesting Syntax: 'Bunch' class

[Andy Todd]

>From an earlier thread I picked up Alex Martelli's 'bunch' class from the 
Active State cookbook ( 
http://www.activestate.com/ASPN/Python/Cookbook/Recipe/52308). I love this 
and will no doubt use it time and again. However, I'm puzzled by a bit of 
syntax that I haven't seen before and can't find (easily) in the manual, 
viz;

"    def __init__(self, **kwds):"

What is the "**kwds" a reference to? All help greatfully received ...

Regards,
Andy
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