Add notes pointing out that these classes are kept for backward compatibility
and suggeest that new code that does not require compatibility with older
Python versions subclass dictionary, list, or str.
diff --git a/Doc/lib/libuserdict.tex b/Doc/lib/libuserdict.tex
index 0285380..7e6d666 100644
--- a/Doc/lib/libuserdict.tex
+++ b/Doc/lib/libuserdict.tex
@@ -4,6 +4,11 @@
\declaremodule{standard}{UserDict}
\modulesynopsis{Class wrapper for dictionary objects.}
+\note{This module is available for backward compatibility only. If
+you are writing code that does not need to work with versions of
+Python earlier than Python 2.2, please consider subclassing directly
+from the built-in \class{dictionary} type.}
+
This module defines a class that acts as a wrapper around
dictionary objects. It is a useful base class for
your own dictionary-like classes, which can inherit from
@@ -38,6 +43,11 @@
\modulesynopsis{Class wrapper for list objects.}
+\note{This module is available for backward compatibility only. If
+you are writing code that does not need to work with versions of
+Python earlier than Python 2.2, please consider subclassing directly
+from the built-in \class{list} type.}
+
This module defines a class that acts as a wrapper around
list objects. It is a useful base class for
your own list-like classes, which can inherit from
@@ -92,6 +102,13 @@
\moduleauthor{Peter Funk}{pf@artcom-gmbh.de}
\sectionauthor{Peter Funk}{pf@artcom-gmbh.de}
+\note{This \class{UserString} class from this module is available for
+backward compatibility only. If you are writing code that does not
+need to work with versions of Python earlier than Python 2.2, please
+consider subclassing directly from the built-in \class{str} type
+instead of using \class{UserString} (there is no built-in equivalent
+to \class{MutableString}).}
+
This module defines a class that acts as a wrapper around string
objects. It is a useful base class for your own string-like classes,
which can inherit from them and override existing methods or add new