matplotlib-users Mailing List for matplotlib

Ok, there has been a lot of useful discussion (for both MacOSX and Windows),
but in the end, I want to know this: Is it possible for matplotlib to
provide a single, recommended, fully-supported-by-us method for installing
our package (possibly for each platform?).  Could it be pip? Or some other
option?

It is kinda sad that the linux install instructions are easier than the
other platform instructions, and I don't think we even provide a linux
installer.

Ben Root

On 08/21/2011 05:54 AM, CAB wrote:
> Hi, All,
>
> Sorry if this complaint appears twice on this list.
>
> I have been using Matplotlib for a while, and I'm getting to the point
> where I'd like to embed the output in a Tk GUI application. I'm new to
> Tkinter. Here is the problem. Using the script that's in the "examples"
> page on the web documentation, I run "embedding_in_tk.py". That works.
> But if I uncomment the Tkinter-style "Quit" button that is at the bottom
> of this script, any attempt to quit using the Quit button causes the
> following error:
>
> Fatal Python Error: PyEval_RestoreThread: NULL tstate

That's probably why the button was commented out.  I think the problem 
here is that using these gui toolkits is tricky, and the tk examples 
were never worked out adequately.  There are various ways of putting a 
quit button back into the example.  Try the one attached.  If it works 
for you, I will make it replace the present example, and I will delete 
the embedding_in_tk2.py example because it adds nothing of interest.

Eric

>
> I am using clean installs of Python 2.7, numpy 1.6.1, and matplotlib
> 1.0.1 (all 32-bit versions running under a Win 7 64-bit OS). I have not
> modified the matplotlibrc. Given that this is not working "out of the
> box", I'm wondering if there is a bug in FigureCanvasTkAgg or the tkagg
> backend in general.
>
> A look at the archives shows a user named Jakob having a similar
> problem, but the solution (if any) was not posted.
>
> Any help on this front is appreciated.
>
> Chad
>
>
>
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On Sun, Aug 21, 2011 at 2:13 PM, Jouni K. Seppänen <jk...@ik...> wrote:

> Tony Yu <ts...@gm...> writes:
>
> > IOError: [Errno 4] Interrupted system call
>
> Sounds like http://bugs.python.org/issue1068268, which is supposed to
> have been fixed. Which version of Python are you running?
>
Hi Jouni,

That bug does sound similar. I'm running Python 2.6.1 (default in OSX 10.6),
and it looks like this bug wasn't fixed until much later. I was planning to
upgrade to OSX 10.7 soon, so I guess this should fix itself.

Thanks for digging up the bug report!
-Tony

On Sun, Aug 21, 2011 at 12:42 PM, Chris Withers <ch...@si...> wrote:
> Hi All,
>
> The majority of the docs for matplotlib focus on making its behaviour
> like that of Matlab, however, I'm looking to use it to generate graphs
> for display by web apps.
>
> Where can I find good examples of doing this?
> (ie: multi-threaded, multi-process apps which may by simulaneously
> generating many plots for different users using different data)

Check out this FAQ

  http://matplotlib.sourceforge.net/faq/howto_faq.html#matplotlib-in-a-web-application-server

and the guide to the matplotlib OO heirachy

  http://matplotlib.sourceforge.net/users/artists.html

and all of the examples in the API directory

http://matplotlib.sourceforge.net/examples/api/index.html

which emphasize the OO API and avoid the state-machine of the pylab
matlab-like interface

JDH

On Sun, Aug 21, 2011 at 12:42 PM, Chris Withers <ch...@si...>wrote:

> Hi All,
>
> The majority of the docs for matplotlib focus on making its behaviour
> like that of Matlab, however, I'm looking to use it to generate graphs
> for display by web apps.
>
> Where can I find good examples of doing this?
> (ie: multi-threaded, multi-process apps which may by simulaneously
> generating many plots for different users using different data)
>
> cheers,
>
> Chris
>
>
Haven't tried it out myself, but you might want to check out the HTML5
backend that has been worked on by some members of the community:

http://code.google.com/p/mplh5canvas/

I hope this helps!
Ben Root

Hi All,

The majority of the docs for matplotlib focus on making its behaviour 
like that of Matlab, however, I'm looking to use it to generate graphs 
for display by web apps.

Where can I find good examples of doing this?
(ie: multi-threaded, multi-process apps which may by simulaneously 
generating many plots for different users using different data)

cheers,

Chris

-- 
Simplistix - Content Management, Batch Processing & Python Consulting
             - http://www.simplistix.co.uk

Tony Yu <ts...@gm...> writes:

> IOError: [Errno 4] Interrupted system call

Sounds like http://bugs.python.org/issue1068268, which is supposed to
have been fixed. Which version of Python are you running?

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Jeff Klukas <kl...@wi...> writes:

>   File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/dviread.py",
> line 727, in _register
>     assert encoding is None
> AssertionError

This sounds like this issue:
https://github.com/matplotlib/matplotlib/issues/191

There is a workaround in git commit 708c451 (patch below), which you
could apply to your local copy of dviread.

Hi, All,

Sorry if this complaint appears twice on this list.

I have been using Matplotlib for a while, and I'm getting to the point where I'd like to embed the output in a Tk GUI application.  I'm new to Tkinter.  Here is the problem.  Using the script that's in the "examples" page on the web documentation, I run "embedding_in_tk.py".  That works.  But if I uncomment the Tkinter-style "Quit" button that is at the bottom of this script, any attempt to quit using the Quit button causes the following error:

Fatal Python Error: PyEval_RestoreThread: NULL tstate

I am using clean installs of Python 2.7, numpy 1.6.1, and matplotlib 1.0.1 (all 32-bit versions 
running under a Win 7 64-bit OS).  I have not modified the matplotlibrc.  Given that this is not working "out of the box", I'm wondering if there is a bug in FigureCanvasTkAgg or the tkagg backend in general.

A look at the archives shows a user named Jakob having a similar problem, but the solution (if any) was not posted.

Any help on this front is appreciated.

Chad

Dear Jakob and Ben, 

I am seeing the same error.  This is with a clean install of Python 2.7,
numpy 1.6.1, and matplotlib 1.0.1 (all 32-bit versions running under a Win 7
64-bit OS).  In fact, all I am doing to test this is to execute the
'embedding_in_tk.py' example that is on the examples web page, with the
button calls at the end of the script uncommented.  Any attempt to use that
'Quit' button causes the NULL tstate error.

Any info on this would be appreciated.  I'm not saying I'm an expert, but
given that this isn't working "out of the box," it appears to be a bug.

Chad


Benjamin Root-2 wrote:
> 
> On Wed, Aug 3, 2011 at 3:50 AM, Jakob123
> <jak...@is...>wrote:
> 
>>
>> Hej there!
>> I am using PyPlot to draw onto a Tkinter GUI (in Python 2.6). Works fine,
>> but when I close the window (root.destroy()) PyPlot apparently crashes
>> with
>> the error message "Fatal Python error: PyEval_RestoreThread: NULL tstate"
>> (error 0x40000015). 
>>
>>
> Jakob,
> 
> A little while back, we put out an important v1.0.1 release that addressed
> many issues with the various backends.  While I don't remember all of the
> bugs it fixed, it may have fixed that one.  I would suggest installing
> that
> version and seeing if it work for you.
> 
> Ben Root
> 
> 
> 

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On 07/08/2011 22:29, David Warde-Farley wrote:
>> Secondly, once I've populated this, any good examples of how to turn it
>> into a bar chart? (the simple bar chart would be number of sales on the
>> y-axis, weeks before the event on the x-axis, however, what I'd then
>> like to do is split each bar into chunks for each venue's sales, if that
>> makes sense?)
>
> This might give you an example of what you need:
>
> http://matplotlib.sourceforge.net/examples/pylab_examples/bar_stacked.html
>
> but you'd be better off asking on matplotlib-users.

Thanks, that was a good start.

One question: How can I automatically get a list of colours for each 
bar? I don't know how many bars I'm going to have so I can't manually 
pick them...

This feels like a common enough problem that I'm guessing there's a 
solution somewhere in matplotlib?

cheers,

Chris

-- 
Simplistix - Content Management, Batch Processing & Python Consulting
             - http://www.simplistix.co.uk