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Then running the module as a script will cause the examples in the
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python M.py

This won't display anything unless an example fails, in which case the
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Run it with the -v switch instead:

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and a detailed report of all examples tried is printed to stdout, along
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You can force verbose mode by passing "verbose=True" to testmod, or prohibit
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examined by testmod.

There are a variety of other ways to run doctests, including integration
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        IGNORE_EXCEPTION_DETAIL
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        REPORT_CDIFF
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             ...    failure = f

           DocTestFailure objects provide access to the test:

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