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Ever since upgrading matplotlib I get the following error whenever trying to create a legend: /usr/lib/pymodules/python2.7/matplotlib/legend.py:610: UserWarning: Legend does not support [<matplotlib.lines.Line2D object at 0x3a30810>] Use proxy artist instead. http://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist warnings.warn("Legend does not support %s\nUse proxy artist instead.\n\nhttp://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist\n" % (str(orig_handle),)) /usr/lib/pymodules/python2.7/matplotlib/legend.py:610: UserWarning: Legend does not support [<matplotlib.lines.Line2D object at 0x3a30990>] Use proxy artist instead. http://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist warnings.warn("Legend does not support %s\nUse proxy artist instead.\n\nhttp://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist\n" % (str(orig_handle),)) This even occurs with a trivial script like this: import matplotlib.pyplot as plt a = [1,2,3] b = [4,5,6] c = [7,8,9] plot1 = plt.plot(a,b) plot2 = plt.plot(a,c) plt.legend([plot1,plot2],["plot 1", "plot 2"]) plt.show() I've found the link that the error points me towards pretty useless in diagnosing the source of the error.

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