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<p class=MsoNormal>I am trying to chain filter functions together so I created these
2 functions.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>def AndChain(*filters):<o:p></o:p></p>
<p class=MsoNormal> return (lambda asset: reduce((lambda r,
f: apply(f, asset) and r), filters))<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>def OrChain(*filters):<o:p></o:p></p>
<p class=MsoNormal> return (lambda asset: reduce((lambda r,
f: apply(f, asset) or r), filters))<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Where filters are simply functions that take a single
argument and return true or false. My intention is to use these functions
like this:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>f = AndChain(AssetTypeFilter(), CurrencyFilter())<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>filteredCol = filter(f, col)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am receiving the following error (where Asset is the type
of items in my collection)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Traceback (most recent call last):<o:p></o:p></p>
<p class=MsoNormal> File , line 0, in <stdin>##44<o:p></o:p></p>
<p class=MsoNormal> File
c:\proj\ofts\com.oakwoodft.ofts.compliance\complianceframework\filters\assetfilters.py,
line 5, in <lambda<o:p></o:p></p>
<p class=MsoNormal> File
c:\proj\ofts\com.oakwoodft.ofts.compliance\complianceframework\filters\assetfilters.py,
line 5, in <lambda<o:p></o:p></p>
<p class=MsoNormal>TypeError: <Asset object at 0x000000000000002B> is not
enumerable<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Am I going about this totally wrong? Is there a better
solution? <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b>Drew Schaeffer</b><o:p></o:p></p>
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