.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/demo_pie.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_examples_demo_pie.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_demo_pie.py:


====================
Labeled pie chart
====================

.. GENERATED FROM PYTHON SOURCE LINES 6-80



.. image-sg:: /examples/images/sphx_glr_demo_pie_001.png
   :alt: Matplotlib bakery: A donut
   :srcset: /examples/images/sphx_glr_demo_pie_001.png
   :class: sphx-glr-single-img





.. code-block:: Python


    import matplotlib.pyplot as plt
    import numpy as np

    fig, ax = plt.subplots(num=1, figsize=(8, 4), clear=True)

    recipe = ["225 g flour",
              "90 g sugar",
              "1 egg",
              "60 g butter",
              "100 ml milk",
              "1/2 package of yeast"]

    data = [225, 90, 50, 60, 100, 5]

    wedges, texts = ax.pie(data, wedgeprops=dict(width=0.5), startangle=-40,
                           frame=False)


    aspect = 0.5 # aspect will also be used to change the connection style of
                 # annotations.
    ax.set_aspect(aspect)

    ax.set_xlim(-2, 2)
    ax.set_ylim(-1, 1.5)
    # It helps to draw the pie with frame=True, to get the idea of xlim and ylim.

    bbox_props = dict(boxstyle="square,pad=0.3", fc="w", ec="k", lw=0.72)
    kw = dict(arrowprops=dict(arrowstyle="-"),
              bbox=bbox_props, zorder=2, va="center")

    for i, p in enumerate(wedges):
        ang = (p.theta2 - p.theta1)/2. + p.theta1
        y = np.sin(np.deg2rad(ang))
        x = np.cos(np.deg2rad(ang))

        # We need to recalculate the angle to accound axes aspect.
        ang2 = np.arctan2(y*0.5, x)/np.pi*180
        horizontalalignment = {-1: "right", 1: "left"}[int(np.sign(x))]
        connectionstyle = f"angle,angleA=0,angleB={ang2}"
        kw["arrowprops"].update({"connectionstyle": connectionstyle})
        ax.annotate(recipe[i], xy=(x, y), xytext=(1.35*np.sign(x), 1.5*y),
                    horizontalalignment=horizontalalignment,
                    **kw)

    ax.set_title("Matplotlib bakery: A donut")

    # 3d effects
    from matplotlib.colors import LightSource
    from mpl_poormans_3d import Poormans3d, Poormans3dFace
    from mpl_poormans_3d.poormans_3d import ArtistListWithPoormans3d

    ls = LightSource(azdeg=35)

    patch_list = wedges

    # The 3d faces of all patches need to be collected and sorted.
    # ArtistListWithPoormans3d does this.
    height = np.array([0, -40])
    kw = dict(fraction=0.3, direction=1)
    kw_face = dict(fraction=0.3)

    al = ArtistListWithPoormans3d(patch_list,
                                  ls, 0.5* height, displacement0=0,
                                  **kw)

    ax.add_artist(al)

    for patch in patch_list:
        patch.set_path_effects([
            Poormans3dFace(ls, 0, **kw_face),
        ])

    plt.show()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.177 seconds)


.. _sphx_glr_download_examples_demo_pie.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: demo_pie.ipynb <demo_pie.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: demo_pie.py <demo_pie.py>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_