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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"When I run a file that uses matplolib animation, I keep getting this error. Using OS X, Python 2.7, installed Python from python.org then used homebrew. Matplotlib install from pip. ","articleBody":"To help us understand and resolve your issue please check that you have provided\nthe information below.\n- [ ] Matplotlib version, Python version and Platform (Windows, OSX, Linux ...)\n- [ ] How did you install Matplotlib and Python (pip, anaconda, from source ...)\n- [ ] If possible please supply a [Short, Self Contained, Correct, Example](http://sscce.org/)\n    that demonstrates the issue i.e a small piece of code which reproduces the issue\n    and can be run with out any other (or as few as possible) external dependencies.\n- [ ] If this is an image generation bug attach a screenshot demonstrating the issue.\n- [ ] If this is a regression (Used to work in an earlier version of Matplotlib), please \n    note where it used to work.\n\n``` pytb\nError:\nTraceback (most recent call last):\n  File \"HOstates.py\", line 20, in \u003cmodule\u003e\n    import matplotlib.animation as animation\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py\", line 365, in \u003cmodule\u003e\n    class FFMpegWriter(MovieWriter, FFMpegBase):\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py\", line 49, in wrapper\n    if writerClass.isAvailable():\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/animation.py\", line 239, in isAvailable\n    stdout=subprocess.PIPE, stderr=subprocess.PIPE)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py\", line 710, in __init__\n    errread, errwrite)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py\", line 1334, in _execute_child\n    child_exception = pickle.loads(data)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py\", line 1388, in loads\n    return Unpickler(file).load()\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py\", line 864, in load\n    dispatch[key](self)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py\", line 972, in load_string\n    raise ValueError, \"insecure string pickle\"\nValueError: insecure string pickle\n```\n","author":{"url":"https://github.com/TariniHardikar","@type":"Person","name":"TariniHardikar"},"datePublished":"2016-04-29T07:02:19.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/6348/matplotlib/issues/6348"}