Re: [matplotlib-devel] tk backend broken (somehow?)

[Thomas C. <tca...@gm...>]

Have a look at the recipe in conda-rescipes for matplotlib, they might be
doing some funny patching.

On Mon, Nov 17, 2014, 22:48 Benjamin Root <ben...@ou...> wrote:

> Ok, I am just really confused now. I have confirmed that using the
> matplotlib supplied by miniconda (v1.4.2) works just fine. Ripping that out
> and building version 1.4.2 from source results in the traceback. Same thing
> for v1.3.1. I have even tried checking out PR#3811 which addresses the
> weird constructor issues we found today, and I still get the segfault.
>
> Maybe I should try getting out of the conda environment entirely and try
> EPD instead to see if that makes a difference?
>
> Ben Root
>
> On Mon, Nov 17, 2014 at 5:17 AM, Phil Elson <pel...@gm...> wrote:
>
>> Mike made some changes to this recently.
>> https://github.com/matplotlib/matplotlib/pull/3778
>>
>> May be the cause.
>>
>> On 16 November 2014 18:12, Benjamin Root <ben...@ou...> wrote:
>>
>>> And with my continuing saga of backend-specific things...
>>>
>>> I was using conda, but because it does not ship with pygtk support, I
>>> had to manually install pygtk into the conda environment and then install
>>> matplotlib from source. All that seemed to work fine when I worked on Wx
>>> and Gtk examples for my book.
>>>
>>> I went back to a (previously working) Tk example to polish it, and I get
>>> all sorts of errors now. I have tried multiple releases of matplotlib from
>>> source (doing a git clean -fxd between them), all with similar errors. In
>>> fact, with master, the error causes a segfault:
>>>
>>> ben@tigger:~/Documents/InteractiveMPL$ python chp5/slider_tk.py
>>> Exception in Tkinter callback
>>> Traceback (most recent call last):
>>>   File "/home/ben/miniconda/lib/python2.7/lib-tk/Tkinter.py", line 1486,
>>> in __call__
>>>     return self.func(*args)
>>>   File
>>> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
>>> line 278, in resize
>>>     self.show()
>>>   File
>>> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
>>> line 350, in draw
>>>     tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
>>>   File
>>> "/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/tkagg.py",
>>> line 30, in blit
>>>     id(data), colormode, id(bbox_array))
>>> TclError
>>> alloc: invalid block: 0x2cfe3b0: 0 0
>>> Aborted (core dumped)
>>>
>>> The line in question is (at least in v1.3.1, it is slightly different in
>>> more recent versions):
>>> tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode,
>>> id(bbox_array))
>>>
>>> This happens regardless of what example I use (my own or otherwise).
>>> There is no blit-specific code in the examples. All of this worked with the
>>> conda-supplied matplotlib, but never the
>>> from-source-into-a-conda-environment install.
>>>
>>> Thoughts?
>>> Ben Root
>>>
>>>
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>>
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