well-designed code improves its flexibility by allowing polymorphic
substitution. Duck-typing avoids tests using :func:`type` or
:func:`isinstance`. (Note, however, that duck-typing can be complemented
- with :term:`abstract base class`\ es.) Instead, it typically employs
- :func:`hasattr` tests or :term:`EAFP` programming.
+ with :term:`abstract base classes <abstract base class>`.) Instead, it
+ typically employs :func:`hasattr` tests or :term:`EAFP` programming.
EAFP
Easier to ask for forgiveness than permission. This common Python coding