Re: [matplotlib-devel] Projections - custom_projection_example.py
On 10/04/2010 02:10 AM, Mitchell Jon Stanton-Cook wrote: Hi Andrew, Thanks for the reply. I do not want to force users of my software to have to download and install basemap. It's just overkill for a small Python program that I'm developing. Perhaps I'm best to try and use a PathPatch for the _gen_axes_patch _gen_axes_spines. Does anyone have any ideas? Yes -- you would need to make a custom shape, and PathPatch or Polygon (if straight line segments are sufficient) are probably the way to go. Mike Regards Mitch On 04/10/10 06:10, Andrew Straw wrote: On 10/2/2010 8:33 PM, Mitchell Jon Stanton-Cook wrote: Hello, I have been trying to modify the custom projection example (http://matplotlib.sourceforge.net/examples/api/custom_projection_example.html) to plot a Sanson Flamsteed Projection (Sinusoidal projection). Dear Mitchell, Can you use the 'sinu' projection in basemap? E.g. basemap/examples/contour_demo.py figure 1. -Andrew -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- Michael Droettboom Science Software Branch Space Telescope Science Institute Baltimore, Maryland, USA -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] Event handling broken in svn?
On 10/01/2010 02:01 PM, Fernando Perez wrote: Hey Ryan, On Fri, Oct 1, 2010 at 6:27 AM, Ryan Mayrma...@gmail.com wrote: On Fri, Oct 1, 2010 at 1:05 AM, Fernando Perezfperez@gmail.com wrote: This manifested itself in some more complex MPL code that had multiple events not working when run inside ipython, but working OK outside of ipython. Fortunately, the small self-contained example demonstrates the problem even with ipython not being in the picture at all (the runs above were from the command line), so I think there is an issue in MPL proper. Sorry that I can't dig deeper into the code right now to look for a fix... Somewhere in the 1.0 development cycle, Michael modified the callback code to take weak references to methods. The purpose was to eliminate some leaks that were occurring because callback connections to objects were keeping them around and the proper disconnects were not made (much simpler fix than tracking down every mpl_connect and trying to see where do disconnect). What you're seeing in your script is that since you're not assigning the Handler object to anything, it's being garbage collected. It works for me if I change the second to last line to: h = Handler(f) Many thanks for the info, that helps a lot. I was wondering though, would we still have a leak if strong references are held in the canvas attribute? The canvas will be deleted when the figure goes away, so that should properly allow the callback references to be deleted, without deleting them early otherwise, no? The problem is when callbacks create cyclical references (which your example does not). If the Handler class in your example needed to update the figure or canvas in some way in the callback (which is a common usage pattern), that cyclical reference prevents either from being destroyed without running the cyclical garbage collector. And in that case, you can't write a __del__ method on the handler to explicitly disconnect the callbacks. In any case, if my logic is flawed (quite likely, since I imagine M. D. had a good look at this), it might be worth adding a .. warning:: section about this pattern to the event docs: http://matplotlib.sourceforge.net/users/event_handling.html because the problem is subtle and hard to diagnose (I just noticed it had also been reported recently http://sourceforge.net/mailarchive/forum.php?thread_name=4C9B7793.5020908%40gmail.comforum_name=matplotlib-devel). True -- it's non-obvious and confusing. On the other hand, the user is no longer required to explicitly disconnect callbacks, which was the source of many other subtle and hard to diagnose problems within the matplotlib code itself. I'm still not completely happy with it, so I'd love to find a third way if there's anything anyone can suggest. Mike -- Michael Droettboom Science Software Branch Space Telescope Science Institute Baltimore, Maryland, USA -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] Projections - custom_projection_example.py
Hi Andrew, Thanks for the reply. I do not want to force users of my software to have to download and install basemap. It's just overkill for a small Python program that I'm developing. Perhaps I'm best to try and use a PathPatch for the _gen_axes_patch _gen_axes_spines. Does anyone have any ideas? Regards Mitch On 04/10/10 06:10, Andrew Straw wrote: On 10/2/2010 8:33 PM, Mitchell Jon Stanton-Cook wrote: Hello, I have been trying to modify the custom projection example (http://matplotlib.sourceforge.net/examples/api/custom_projection_example.html) to plot a Sanson Flamsteed Projection (Sinusoidal projection). Dear Mitchell, Can you use the 'sinu' projection in basemap? E.g. basemap/examples/contour_demo.py figure 1. -Andrew -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
[matplotlib-devel] Streamlines
Are developers of matplotlib planning to implement something like this: http://www.pyngl.ucar.edu/Examples/Images/ngl04p.2.png ? Thanks. -- View this message in context: http://old.nabble.com/Streamlines-tp29867429p29867429.html Sent from the matplotlib - devel mailing list archive at Nabble.com. -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] RuntimeError: Could not open facefile
Hi there, I am a newcomer to this sort of thing, and inherited some Python code that used matplotlib. I compiled the code as a windows executable, and sent it out to my students.. Now, one of them is coming back to me with the error you speak of.. (i.e. facefile problem with Vera.ttf) Any hint on getting around this? Maybe I need to give more info, however I am not sure what you might need.. Any help, gratefully accepted. Benjamin Root-2 wrote: Yes! Thank you! As extra debugging info, the issue was happening regardless of me choosing GTK, GTKAgg, and others for backends. Ben Root On Thu, Jun 3, 2010 at 2:45 PM, John Hunter jdh2...@gmail.com wrote: Just a shot in the dark, but does it help to flush the font cache in your .matplotlib dir? rm -rf ~/.matplotlib/font*.cache JDH -- View this message in context: http://old.nabble.com/RuntimeError%3A-Could-not-open-facefile-tp28772066p29879230.html Sent from the matplotlib - devel mailing list archive at Nabble.com. -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] Event handling broken in svn?
On Mon, Oct 4, 2010 at 6:13 AM, Michael Droettboom md...@stsci.edu wrote: The problem is when callbacks create cyclical references (which your example does not). If the Handler class in your example needed to update the figure or canvas in some way in the callback (which is a common usage pattern), that cyclical reference prevents either from being destroyed without running the cyclical garbage collector. And in that case, you can't write a __del__ method on the handler to explicitly disconnect the callbacks. In any case, if my logic is flawed (quite likely, since I imagine M. D. had a good look at this), it might be worth adding a .. warning:: section about this pattern to the event docs: http://matplotlib.sourceforge.net/users/event_handling.html because the problem is subtle and hard to diagnose (I just noticed it had also been reported recently http://sourceforge.net/mailarchive/forum.php?thread_name=4C9B7793.5020908%40gmail.comforum_name=matplotlib-devel). True -- it's non-obvious and confusing. On the other hand, the user is no longer required to explicitly disconnect callbacks, which was the source of many other subtle and hard to diagnose problems within the matplotlib code itself. I'm still not completely happy with it, so I'd love to find a third way if there's anything anyone can suggest. Thanks for your explanation, it makes complete sense. I think it's OK, Eric just added a warning to the docs, which will go a long ways towards making this less of a user trap. Given the details you provided, I can't think of a generic way to handle these cycles 100% automatically. Using weakrefs seems like the most sensible solution, and users will just need to understand a little bit more before using this functionality. Event handling isn't raw beginner material in any case, so I don't think it's a huge problem. And if someone ever devises a clever solution to the problem, then great! But for now I think you can safely ignore this further. Regards, f -- Virtualization is moving to the mainstream and overtaking non-virtualized environment for deploying applications. Does it make network security easier or more difficult to achieve? Read this whitepaper to separate the two and get a better understanding. http://p.sf.net/sfu/hp-phase2-d2d ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
