René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PGF back-end fails on simple graph","articleBody":"I'm not sure if this is related to the other Unicode/codec issue, but I'm trying out the pgf backend and I'm seeing what appears to be an issue with Unicode/codecs using matplotlib git master and Python 2.7 (Ubuntu 12.04):\n\n```\njholewinski@rapture [tests]$ python t1.py \nTraceback (most recent call last):\n  File \"t1.py\", line 14, in \u003cmodule\u003e\n    fig.savefig('ti.pgf', bbox_inches='tight')\n  File \"/home/jholewinski/projects/matplotlib/matplotlib-pgf/build/lib.linux-x86_64-2.7/matplotlib/figure.py\", line 1262, in savefig\n    self.canvas.print_figure(*args, **kwargs)\n  File \"/home/jholewinski/projects/matplotlib/matplotlib-pgf/build/lib.linux-x86_64-2.7/matplotlib/backend_bases.py\", line 2048, in print_figure\n    **kwargs)\n  File \"/home/jholewinski/projects/matplotlib/matplotlib-pgf/build/lib.linux-x86_64-2.7/matplotlib/backend_bases.py\", line 1848, in print_pgf\n    return pgf.print_pgf(*args, **kwargs)\n  File \"/home/jholewinski/projects/matplotlib/matplotlib-pgf/build/lib.linux-x86_64-2.7/matplotlib/backends/backend_pgf.py\", line 664, in print_pgf\n    with codecs.open(filename, \"w\", encoding=\"utf-8\") as fh:\n  File \"/usr/lib/python2.7/codecs.py\", line 881, in open\n    file = __builtin__.open(filename, mode, buffering)\nTypeError: coercing to Unicode: need string or buffer, _io.BytesIO found\n```\n\nThe graph script is very basic:\n\n```\nimport matplotlib as mpl\nimport matplotlib.pyplot as plt\n\nfig = plt.figure()\n\nsub = fig.add_subplot(1, 1, 1)\n\nsub.plot([1, 2, 3], [2, 3, 4], label='Foo', markersize=2, marker='x')\n\nsub.grid()\nsub.set_axisbelow(True)\nsub.legend(loc=2)\n\nfig.savefig('t1.pgf', bbox_inches='tight')\n```\n\nI just built the latest git master with \"python setup.py build\" and used it directly from the build/ directory.  Interestingly, the tests included with matplotlib do seem to generate graphs.\n","author":{"url":"https://github.com/jholewinski","@type":"Person","name":"jholewinski"},"datePublished":"2012-08-21T18:41:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/1128/matplotlib/issues/1128"}