{
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      "cell_type": "markdown",
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      "source": [
        "\n# Labeling pie charts\n\nThis example illustrates some features of the `~matplotlib.axes.Axes.pie_label`\nmethod, which adds labels to an existing pie chart created with\n`~matplotlib.axes.Axes.pie`.\n"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "The simplest option is to provide a list of strings to label each slice of the pie.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import matplotlib.pyplot as plt\n\ndata = [36, 24, 8, 12]\nlabels = ['spam', 'eggs', 'bacon', 'sausage']\n\nfig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, labels)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "If you want the labels outside the pie, set a *distance* greater than 1.\nThis is the distance from the center of the pie as a fraction of its radius.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, labels, distance=1.1)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "You can also rotate the labels so they are oriented away from the pie center.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, labels, rotate=True)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Instead of explicit labels, pass a format string to label slices with their values...\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, '{absval:.1f}')"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "...or with their percentages...\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, '{frac:.1%}')"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "...or both.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, '{absval:d}\\n{frac:.1%}')"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Font styling can be configured by passing a dictionary to the *textprops* parameter.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\nax.pie_label(pie, labels, textprops={'fontsize': 'large', 'color': 'white'})"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "`~matplotlib.axes.Axes.pie_label` can be called repeatedly to add multiple sets\nof labels.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "fig, ax = plt.subplots()\npie = ax.pie(data)\n\nax.pie_label(pie, labels, distance=1.1)\nax.pie_label(pie, '{frac:.1%}', distance=0.7)\nax.pie_label(pie, '{absval:d}', distance=0.4)\n\nplt.show()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        ".. admonition:: References\n\n   The use of the following functions, methods, classes and modules is shown\n   in this example:\n\n   - `matplotlib.axes.Axes.pie` / `matplotlib.pyplot.pie`\n   - `matplotlib.axes.Axes.pie_label` / `matplotlib.pyplot.pie_label`\n\n.. tags::\n\n   plot-type: pie\n   level: beginner\n\n"
      ]
    }
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