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    {
      "execution_count": null, 
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        "%matplotlib inline"
      ], 
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    {
      "source": [
        "\nPie chart\n=========\n\nA simple pie chart example with matplotlib.\n\n"
      ], 
      "cell_type": "markdown", 
      "metadata": {}
    }, 
    {
      "execution_count": null, 
      "cell_type": "code", 
      "source": [
        "import numpy as np\nimport matplotlib.pyplot as plt\n\nn = 20\nZ = np.ones(n)\nZ[-1] *= 2\n\nplt.axes([0.025, 0.025, 0.95, 0.95])\n\nplt.pie(Z, explode=Z*.05, colors = ['%f' % (i/float(n)) for i in range(n)])\nplt.axis('equal')\nplt.xticks(())\nplt.yticks()\n\nplt.show()"
      ], 
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