On Monday 21 August 2006 17:41, Alan Gauld wrote:
> a=b=[]
> a
> >
> > []
> >
> b
> >
> > []
>
> These are the same list.
>
> a=[1,2,3]
>
> But here you create a new list and assign it to a.
>
> a
> >
> > [1, 2, 3]
> >
> b
> >
> > []
>
> So a points to the new list and
a=b=[]
a
> []
b
> []
These are the same list.
a=[1,2,3]
But here you create a new list and assign it to a.
a
> [1, 2, 3]
b
> []
So a points to the new list and b to the original.
> Tinkering some more I think it is the append that did it.
Yes, the append adds th
On Monday 21 August 2006 13:58, János Juhász wrote:
> Hi Dave,
>
> > From: dave s <[EMAIL PROTECTED]>
> > Subject: [Tutor] A list in list problem
> > To: python tutor
> > Message-ID: <[EMAIL PROTECTED]>
> > Content-Type: text/plain; charset="
On Monday 21 August 2006 13:40, Alan Gauld wrote:
> > So when I needed to make a list of a list in the following code I
> > thought no
> > problem ...
> >
> >
> > def CSV_Lines(self, csv, from_, to):
> >"""Returns a list of cleaned up lines from csv 'from_' line
> > number 'to' line numb
Hi Dave,
> From: dave s <[EMAIL PROTECTED]>
> Subject: [Tutor] A list in list problem
> To: python tutor
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="us-ascii"
> def CSV_Lines(self, csv, from_, to):
> ""&quo
> So when I needed to make a list of a list in the following code I
> thought no
> problem ...
>
>
> def CSV_Lines(self, csv, from_, to):
>"""Returns a list of cleaned up lines from csv 'from_' line
> number 'to' line number"""
>
>clean_line = clean_csv = []
So clean_line is a
On Monday 21 August 2006 10:59, dave s wrote:
Several hours +1 Sometimes it is usefull spelling out my problem in an email -
seems to clarify it - maybe when I get to the 'im stuck' I should send an
email to myself :)
clean_csv.append(clean_line) ... should by
clean_csv.append(clean_line[:])
Help :)
I have been playing with this for several hours & am totally stuck !
I am happy with the following ...
>>> a=[1,2,3]
>>> b=[5,6,7]
>>> a
[1, 2, 3]
>>> b
[5, 6, 7]
>>> g=[]
>>> g
[]
>>> g.append(a)
>>> g
[[1, 2, 3]]
>>> g.append(b)
>>> g
[[1, 2, 3], [5, 6, 7]]
>>>
So when I needed to ma
