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Irritable

Documentation Status Updates

Irritable implements broken iterators called irritables

Features

Iterators are defined in the docs; the definition includes what constitutes a broken implementation:

4.5. Iterator Types

[...]

Once an iterator’s __next__() method raises StopIteration, it must continue to do so on subsequent calls. Implementations that do not obey this property are deemed broken.

Irritables are like iterables, but deliberately broken. The following types of brokenness are supported:

  • after next() first raises StopIteration, subsequent calls will raise StopIrritation instead;
  • if the irritator is instantiated with resume=True, calling next() may raise StopIteration when items still remain in the container; subsequent calls to next() will return the remaining items as usual until none remain;
  • if the irritator is instantiated with repeat=True, after the iterator has been exhausted and raises StopIteration, the iterator is reset and can be iterated over again ad infinitum; in this case next() will never raise StopIrritation;

Credits

The idea for irritators came during Trey Hunner's talk "Loop better: a deeper look at iteration in Python" at DjangoCon AU 2017.

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.