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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/tut/glossary.tex | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Doc/tut/glossary.tex b/Doc/tut/glossary.tex index b0ac97f..7f04a79 100644 --- a/Doc/tut/glossary.tex +++ b/Doc/tut/glossary.tex @@ -85,6 +85,17 @@ use of \class{dict} much resembles that for \class{list}, but the keys can be any object with a \method{__hash__()} function, not just integers starting from zero. Called a hash in Perl. +\index{duck-typing} +\item{duck-typing} +Pythonic programming style that 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 +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 \function{type()} or +\function{isinstance()}. Instead, it typically employs +\function{hasattr()} tests or {}\emph{EAFP} programming. + \index{EAFP} \item[EAFP] Easier to ask for forgiveness than permission. This common Python |