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#3214: improve description of duck-typing in glossary.

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Georg Brandl 2010-07-10 10:39:57 +00:00
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Doc/glossary.rst
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@ -154,9 +154,9 @@ Glossary
object.
duck-typing
A pythonic programming style which determines an object's type by inspection
of its method or attribute signature rather than by explicit relationship
to some type object ("If it looks like a duck and quacks like a duck, it
A programming style which does not look at an object's type to determine
if it has the right interface; instead, the method or attribute is simply
called or used ("If it looks like a duck and quacks like a duck, it
must be a duck.") By emphasizing interfaces rather than specific types,
well-designed code improves its flexibility by allowing polymorphic
substitution. Duck-typing avoids tests using :func:`type` or