cpython/Doc/lib/libuserdict.tex

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\section{Standard Modules \sectcode{UserDict} and \sectcode{UserList}}
\nodename{UserDict and UserList}
\stmodindex{UserDict}
\stmodindex{UserList}
\label{module-UserDict}
\label{module-UserList}
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Each of these modules defines a class that acts as a wrapper around
either dictionary or list objects. They're useful base classes for
your own dictionary-like or list-like classes, which can inherit from
them and override existing methods or add new ones. In this way one
can add new behaviours to dictionaries or lists.
\setindexsubitem{(in module UserDict)}
The \module{UserDict} module defines the \class{UserDict} class:
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\begin{classdesc}{UserDict}{}
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Return a class instance that simulates a dictionary. The instance's
contents are kept in a regular dictionary, which is accessible via the
\member{data} attribute of \class{UserDict} instances.
\end{classdesc}
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\setindexsubitem{(in module UserList)}
The \module{UserList} module defines the \class{UserList} class:
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\begin{classdesc}{UserList}{\optional{list}}
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Return a class instance that simulates a list. The instance's
contents are kept in a regular list, which is accessible via the
\member{data} attribute of \class{UserList} instances. The instance's
contents are initially set to a copy of \var{list}, defaulting to the
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empty list \code{[]}. \var{list} can be either a regular Python list,
or an instance of \class{UserList} (or a subclass).
\end{classdesc}