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

.. only:: html

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

        Click :ref:`here <sphx_glr_download_auto_examples_language_plot_spn_object_hierarchy.py>`
        to download the full example code

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

.. _sphx_glr_auto_examples_language_plot_spn_object_hierarchy.py:


.. _composing_spn_object_hierarchy:

=====================================
Composing SPNs from Sums and Products
=====================================

The alternative to the DSL is to construct SPNs directly from ``Sum`` and
``Product`` objects, demonstrated here:

.. GENERATED FROM PYTHON SOURCE LINES 11-32



.. image-sg:: /auto_examples/language/images/sphx_glr_plot_spn_object_hierarchy_001.png
   :alt: plot spn object hierarchy
   :srcset: /auto_examples/language/images/sphx_glr_plot_spn_object_hierarchy_001.png
   :class: sphx-glr-single-img





.. code-block:: default


    from spn.structure.leaves.parametric.Parametric import Categorical
    from spn.structure.Base import Sum, Product
    from spn.structure.Base import assign_ids, rebuild_scopes_bottom_up

    from spn.io.Graphics import draw_spn
    import matplotlib.pyplot as plt


    p0 = Product(children=[Categorical(p=[0.3, 0.7], scope=1), Categorical(p=[0.4, 0.6], scope=2)])
    p1 = Product(children=[Categorical(p=[0.5, 0.5], scope=1), Categorical(p=[0.6, 0.4], scope=2)])
    s1 = Sum(weights=[0.3, 0.7], children=[p0, p1])
    p2 = Product(children=[Categorical(p=[0.2, 0.8], scope=0), s1])
    p3 = Product(children=[Categorical(p=[0.2, 0.8], scope=0), Categorical(p=[0.3, 0.7], scope=1)])
    p4 = Product(children=[p3, Categorical(p=[0.4, 0.6], scope=2)])
    spn = Sum(weights=[0.4, 0.6], children=[p2, p4])

    assign_ids(spn)
    rebuild_scopes_bottom_up(spn)

    ax = draw_spn(spn)


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

   **Total running time of the script:** ( 0 minutes  0.254 seconds)


.. _sphx_glr_download_auto_examples_language_plot_spn_object_hierarchy.py:


.. only :: html

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



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

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



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

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


.. only:: html

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

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