Matplotlib users, I just put the package "numpngw" up on pypi: https://pypi.python.org/pypi/numpngw The development version is on github: https://github.com/WarrenWeckesser/numpngw
The reason this might be of interest to maplotlib users is the class "numpngw.AnimatedPNGWriter". This class can be used as the "writer" argument of the "save" method of the Animation class. So if you've ever wanted to use matplotlib to create an animated PNG (and who hasn't?), now you can! If you go to the github page, scroll down to Example 8 to see an example of how to save an animation as an animated PNG. You'll need a browser that supports animated PNG to actually see the animation. Firefox does, Safari doesn't, and I haven't checked any others. If you use it and find problems or have suggestions for improvements, email me or create an issue on github. Warren
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