[Zope] stripping values from string

[Paul Winkler]

On Wed, Jan 08, 2003 at 09:22:09AM -0700, Mike Doanh Tran wrote:
> I have two list from my input form:
> 
> ListA: [a,b,c,d]
> ListB: [1,2,3,4]
> 
> How can i strip ListA and ListB so that the 
> first value of ListA will correspond to the first value of ListB
> and the second of A to sencond of B and so on:
> 
> Example: (a,1), (b,2),(c,3),(d,4) 

The python built-in function zip does this.
ListC = zip(ListA, ListB)

Unfortunately, zip seems to be disallowed in through-the-web zope
code. weird.  So you  can roll your own:

ListC = []
for i in range(min(len(ListA), len(ListB))):
   ListC.append( (ListA[i], ListB[i]))


The call to min() ensures that ListC is only as long
as the shortest of ListA and ListB so you  don't get
an IndexError by trying to access non-existent elements
of the shorter list.  not sure if that's what you want.

-- 

Paul Winkler
http://www.slinkp.com
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