Re: [Visualpython-users] Re: strange output

[Bruce S. <bas...@un...>]

Many thanks for this important supplement, Arthur. I should have made this
comment, but at the moment I was writing I couldn't remember how to do it!

Bruce Sherwood

----- Original Message -----
From: "Arthur" <aj...@ix...>
To: "Bruce Sherwood" <bas...@un...>; "vpusers"
<vis...@li...>
Sent: Friday, October 04, 2002 9:13 AM
Subject: Re: [Visualpython-users] Re: strange output


> I think it worth supplementing Bruce's analysis with the solution to what
> was trying to be accomplished by
>
> rininitial = ball.pos
>
> I believe either:
>
> rinitial = ball.pos[:]
>
> or
>
> rinitial =copy(ball.pos)
>
> would get one to where one is trying to go.
>
> [:] returns a complete "slice" of the list.
> copy, of course, a copy of the list.
>
> In either case rinitial is no longer an additional name for ball.pos, but
an
> object independant of it, which will not be modified upon the modification
> of ball.pos.
>
> I think I have this right.  Corrections welcome.
>
> Art