Note

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# Example that fails to execute

This example demonstrates a code block that raises an error and how any code blocks that follow are not executed.

When scripts fail, their gallery thumbnail is replaced with the broken image stamp. This allows easy identification in the gallery display.

You will also get the python traceback of the failed code block.

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     # Code source: Óscar Nájera
     # License: BSD 3 clause
     # sphinx_gallery_line_numbers = True

     import numpy as np
     import matplotlib.pyplot as plt

     plt.pcolormesh(np.random.randn(100, 100))

Out:

    <matplotlib.collections.QuadMesh object at 0x7fb039d16850>

This next block will raise a NameError

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     iae

    Traceback (most recent call last):
      File "/build/sphinx-gallery-e2MrSc/sphinx-gallery-0.8.2/examples/no_output/plot_raise.py", line 27, in <module>
        iae
    NameError: name 'iae' is not defined

Sphinx gallery will stop executing the remaining code blocks after the exception has occurred in the example script. Nevertheless the html will still render all the example annotated text and code blocks, but no output will be shown.

Here is another error raising block but will not be executed

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     plt.plot('Strings are not a valid argument for the plot function')

Estimated memory usage: 214 MB

Gallery generated by Sphinx-Gallery