Re: [Matplotlib-users] BUG: RuntimeError: dictionary changed size during iteration

[Michael D. <md...@st...>]

Does this pull request:

https://github.com/matplotlib/matplotlib/pull/1697

fix your issue?  I have no way of knowing without a test case...

Mike

On 01/22/2013 08:33 AM, Massimiliano Costacurta wrote:
> Hello everyone,
>
> in my program I'm encountering an error when calling the function 
> axes.set_xticks (Matplotlib 1.2.0 on python 2.7-64 bit). It is really 
> difficult for me to build a test case, because my program is really 
> complex. Here is the error traceback:
>
> File "C:\Python27\Lib\site-packages\matplotlib\axes.py", line 2596, in 
> set_xticks
>   return self.xaxis.set_ticks(ticks, minor=minor)
> File "C:\Python27\Lib\site-packages\matplotlib\axis.py", line 1489, in 
> set_ticks
>   self.set_view_interval(min(ticks), max(ticks))
> File "C:\Python27\Lib\site-packages\matplotlib\axis.py", line 1771, in 
> set_view_interval
>   max(vmin, vmax, Vmax))
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 932, in _set_intervalx
>   self.invalidate()
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 131, in invalidate
>   return self._invalidate_internal(value, invalidating_node=self)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 155, in _invalidate_internal
>   invalidating_node=self)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 155, in _invalidate_internal
>   invalidating_node=self)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 155, in _invalidate_internal
>   invalidating_node=self)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 2141, in _invalidate_internal
>   invalidating_node=invalidating_node)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 155, in _invalidate_internal
>   invalidating_node=self)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 2141, in _invalidate_internal
>   invalidating_node=invalidating_node)
> File "C:\Python27\Lib\site-packages\matplotlib\transforms.py", line 
> 153, in _invalidate_internal
>   for parent in self._parents.itervalues():
> File "C:\Python27\Lib\weakref.py", line 147, in itervalues
>   for wr in self.data.itervalues():
> RuntimeError: dictionary changed size during iteration
>
> I googled and found that this is a well known bug due to the use of 
> self.data.itervalues() in the for loop (i think the correct syntax 
> should be for wr in iter(self.data.items()). So I would like to point 
> out the bug (if it is) to the matplotlib guys, how can I do it?
> In the meantime, how can I work around it without changing the source 
> code?
> Thanks in advance!
>
>
> ------------------------------------------------------------------------------
> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
> MVPs and experts. ON SALE this month only -- learn more at:
> http://p.sf.net/sfu/learnnow-d2d
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users