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| -rw-r--r-- | Doc/glossary.rst | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Doc/glossary.rst b/Doc/glossary.rst index 9d63bc4..63d4c2b 100644 --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -30,7 +30,10 @@ Glossary Abstract base classes complement :term:`duck-typing` by providing a way to define interfaces when other techniques like :func:`hasattr` would be clumsy or subtly wrong (for example with - :ref:`magic methods <special-lookup>`). Python comes with many built-in ABCs for + :ref:`magic methods <special-lookup>`). ABCs introduce virtual + subclasses, which are classes that don't inherit from a class but are + still recognized by :func:`isinstance` and :func:`issubclass`; see the + :mod:`abc` module documentation. Python comes with many built-in ABCs for data structures (in the :mod:`collections` module), numbers (in the :mod:`numbers` module), streams (in the :mod:`io` module), import finders and loaders (in the :mod:`importlib.abc` module). You can create your own |