Function to remove elements from a list not working

Hi, I am trying to convert a list of pairs (l4) to list l5 by removing those pairs from l4 which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output. Please help! Its possible i have made

Re: Function to remove elements from a list not working

Le Lundi 12 Juin 2006 10:12, Girish Sahani a écrit : def getl5():     l5 = []     pairList = [[1,2],[3,4],[3,5],[3,6],[9,7],[8,9],[8,7],[7,9],[11,10]]     l4 = [[4,2],[4,7],[4,10],[4,12],[9,2],[9,7],[9,10],[9,12],[11,2],[11,7]] for pair in l4:         if pair not in pairList:            

Function to remove elements from a list not working (corrected)

Hi, I am trying to modify a list of pairs (l4) by removing those pairs which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output. Please help! Its possible i have made a trivial mistke

Re: Function to remove elements from a list not working (corrected)

Le Lundi 12 Juin 2006 10:25, Girish Sahani a écrit : Hi, I am trying to modify a list of pairs (l4) by removing those pairs which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output.

Re: Function to remove elements from a list not working (corrected)

Girish Sahani wrote: Hi, I am trying to modify a list of pairs (l4) by removing those pairs which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output. Please help! Its possible i

Re: Function to remove elements from a list not working (corrected)

Thanks!It workedi wasted a lot of time trying to find a bug in my code...what is wrong in iterating over a list and modifying it? Doesnt python take the modified list every time the loop starts? Also in this case, i want to add a condition that if none of the pairs are in pairList, element =

Re: Function to remove elements from a list not working

Girish Sahani wrote: Hi, I am trying to convert a list of pairs (l4) to list l5 by removing those pairs from l4 which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output. Please

Re: Function to remove elements from a list not working (corrected)

Thank you Markthis works too... Btw going slightly off-topic, when i try to run a code like below with around 50 elements (pairs) in l4,python just hangs. Any ideas why this is happening...the data is not that large :(( Girish Sahani wrote: Hi, I am trying to modify a list of pairs (l4)

Re: Function to remove elements from a list not working (corrected)

Girish Sahani wrote: Hi, I am trying to modify a list of pairs (l4) by removing those pairs which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give the correct output. Please help! Its possible i

Re: Function to remove elements from a list not working (corrected)

Girish Sahani [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I am trying to modify a list of pairs (l4) by removing those pairs which are not present in a third list called pairList. The following is a simplified part of the routine i have written. However it does not give

Re: Function to remove elements from a list not working (corrected)

Girish Sahani wrote: Btw going slightly off-topic, when i try to run a code like below with around 50 elements (pairs) in l4,python just hangs. Any ideas why this is happening...the data is not that large :(( building a filtered new list by repeatedly removing stuff from a copy of the

Re: Function to remove elements from a list not working (corrected)

Girish Sahani wrote: Thanks!It workedi wasted a lot of time trying to find a bug in my code...what is wrong in iterating over a list and modifying it? Doesnt python take the modified list every time the loop starts? this is explained in the tutorial, under the for statement: The for