Iterating through multiple sequences

Harvey Thomas hst at empolis.co.uk
Thu Oct 31 11:58:08 CET 2002


Mark Charsley wrote:
> 
> In several cases recently I've wanted to iterate through two 
> sequences at 
> the same time. The way I've been doing it so far is
> 
>     assert(len(myList1) == len(myList2))
>     for i in range(len(myList1)):
>         doSomethingWith(myList1[i],myList2[i])
>     
> which is a little ugly. Is there some clever idiom I'm 
> missing that would 
> simplify things? Something like
> 
>     for elem1,elem2 in myList1,myList2:
>         doSomethingWith(elem1,elem2)
>         
> which, while valid python, doesn't do what I hoped for
> 
> TIA
> 
> Mark
> 

assert(len(myList1) == len(myList2))
map(doSomethingWith, myList1, myList2)

Harvey

_____________________________________________________________________
This message has been checked for all known viruses by the MessageLabs Virus Scanning Service.




More information about the Python-list mailing list