filter func chaining

[Drew Schaeffer]

I am trying to chain filter functions together so I created these 2 functions.

def AndChain(*filters):
    return (lambda asset: reduce((lambda r, f: apply(f, asset) and r), filters))

def OrChain(*filters):
    return (lambda asset: reduce((lambda r, f: apply(f, asset) or r), filters))

Where filters are simply functions that take a single argument and return true or false.  My intention is to use these functions like this:

f = AndChain(AssetTypeFilter(), CurrencyFilter())

filteredCol = filter(f, col)

I am receiving the following error (where Asset is the type of items in my collection)

Traceback (most recent call last):
  File , line 0, in <stdin>##44
  File c:\proj\ofts\com.oakwoodft.ofts.compliance\complianceframework\filters\assetfilters.py, line 5, in <lambda
  File c:\proj\ofts\com.oakwoodft.ofts.compliance\complianceframework\filters\assetfilters.py, line 5, in <lambda
TypeError: <Asset object at 0x000000000000002B> is not enumerable

Am I going about this totally wrong?  Is there a better solution?

Thanks.

Drew Schaeffer
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20081128/7abe5485/attachment.html>