Re: [Matplotlib-users] Rectangle Bug

[Eric F. <ef...@ha...>]

On 2012/09/06 9:03 PM, Phil Elson wrote:
> This seems to a be common misconception...
>
> I guess in future, we could add a check to the add_patch method to see
> if the given artist already has an associated Axes, and if it does, emit
> a warning.

It's not just patches; but I think a single warning in Artist.add_axes 
would do it, perhaps at the cost of generating an unnecessary warning 
for some legitimate use case.

Eric

>
>
>
> On 7 September 2012 07:42, Eric Firing <ef...@ha...
> <mailto:ef...@ha...>> wrote:
>
>     On 2012/09/06 8:35 PM, jonasr wrote:
>      > That seems to work, thank you.
>      >
>      > I would have thought that the add_patch function creates two seperate
>      > objects independent of the defined Rectangle.
>
>     add_patch doesn't create any objects; it just attaches the axes to the
>     patch in both directions: a reference to the patch object is appended to
>     a list of axes artists, and the patch object gets a reference to the
>     axes.  Fortunately, python has garbage collection to handle such
>     circular references.
>
>     Eric
>
>      >
>      > greets jonas
>
>
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