René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"fail to import matplotlib.pyplot","articleBody":"I have found the following problem:\n\nI tried a new Installation of Python 3.3.2 64-bit with WinPython-64bit-3.3.2.2 on a Windows 7 64 bit machine.\n\nEver when I try to import matplotlib.pyplot (with some of my user accounts i use on this Windows-7 machine) I get tthe following error message:\n\nTraceback (most recent call last):\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 1348, in \u003cmodule\u003e\n    fontManager = pickle_load(_fmcache)\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 947, in pickle_load\n    with open(filename, 'rb') as fh:\nFileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\Jobst3\\.matplotlib\\fontList.py3k.cache'\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\pyplot.py\", line 24, in \u003cmodule\u003e\n    import matplotlib.colorbar\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\colorbar.py\", line 29, in \u003cmodule\u003e\n    import matplotlib.collections as collections\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\collections.py\", line 23, in \u003cmodule\u003e\n    import matplotlib.backend_bases as backend_bases\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\backend_bases.py\", line 50, in \u003cmodule\u003e\n    import matplotlib.textpath as textpath\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\textpath.py\", line 11, in \u003cmodule\u003e\n    import matplotlib.font_manager as font_manager\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 1356, in \u003cmodule\u003e\n    _rebuild()\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 1341, in _rebuild\n    fontManager = FontManager()\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 1004, in __init__\n    self.ttflist = createFontList(self.ttffiles)\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 584, in createFontList\n    prop = ttfFontProperty(font)\n  File \"D:\\WinPython_3.3.2.2\\python-3.3.2.amd64\\lib\\site-packages\\matplotlib\\font_manager.py\", line 398, in ttfFontProperty\n    sfnt4 = sfnt4.decode('ascii').lower()\nUnicodeDecodeError: 'ascii' codec can't decode byte 0x82 in position 0: ordinal not in range(128)\n\nThe same issue happens with other python version (3.2.3 64 bit, as I installed matplotlib 1.3. with easy install).\n\nI found out that this happens only with newly created user accounts, but not with older accounts. As I found out, python is looking for a file located in the user folder: C:\\Users\\Jobst3\\.matplotlib\\fontList.py3k.cache' which is not there in the newly created user account.\n\nBut the file is available in older user accounts. The file was created by an older version of matplotlib (matplotlib-1.2.0rc2.win-amd64-py3.2), and everything goes fine, if i use these accounts.\n\nI am not able to test the issue on a complete new and clean Windows-7 machine at the moment\n\nMatthias\n","author":{"url":"https://github.com/matthiasdresden","@type":"Person","name":"matthiasdresden"},"datePublished":"2013-08-21T10:22:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/2320/matplotlib/issues/2320"}