Re: dictionary containing a list

Fredrik Lundh [EMAIL PROTECTED] wrote: Steve Holden wrote: One of the fascinating things about c.l.py is that sometimes a questin will be posted that makes almost no sense to me, and somebody else will casually read the OP's mind, home in on the issue and provide a useful and relevant

Re: dictionary containing a list

I think what you mean is that if you change your list, it is changed somewhere in your dicrionary to. Lists are always copied as pointers, except explicitly told other wise. So a = b = [] makes a and be the same list, and a.append(1) makes b - [1]. So do something like mydict[mykey] = mylist[:]

Re: dictionary containing a list

John Machin wrote: Ben wrote: Hello... I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... It would appear that what I am dumping into the

Re: dictionary containing a list

Steve Holden wrote: One of the fascinating things about c.l.py is that sometimes a questin will be posted that makes almost no sense to me, and somebody else will casually read the OP's mind, home in on the issue and provide a useful and relevant answer. if the assertions made by some

Re: dictionary containing a list

Steve Holden wrote: John Machin wrote: Ben wrote: Hello... I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... It would appear that what I

dictionary containing a list

Hello... I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... It would appear that what I am dumping into the dictionary value is only a pointer to the

Re: dictionary containing a list

Ben wrote: Hello... I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... It would appear that what I am dumping into the dictionary value is only

Re: dictionary containing a list

Ben [EMAIL PROTECTED] writes: I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... Our crystal balls are notoriously unreliable for viewing program

Re: dictionary containing a list

Ben wrote: I have set up a dictionary into whose values I am putting a list. I loop around and around filling my list each time with new values, then dumping this list into the dictionary. Or so I thought... It would appear that what I am dumping into the dictionary value is only a pointer

Re: dictionary containing a list

On 6 Oct 2006 14:37:59 -0700, Ben [EMAIL PROTECTED] wrote: Is there a way to acheive what I was attempting ? I have done something almost identical with classes in a list before, and in that case a new instance was created for each list entry... Not sure what you're trying to pull off, but

Re: dictionary containing a list

I think what you mean is that if you change your list, it is changed somewhere in your dicrionary to. Lists are always copied as pointers, except explicitly told other wise. So a = b = [] makes a and be the same list, and a.append(1) makes b - [1]. So do something like mydict[mykey] = mylist[:]