In general, the \var{key} and \var{reverse} conversion processes are
much faster than specifying an equivalent \var{cmp} function. This is
because \var{cmp} is called multiple times for each list element while
- \var{key} and \{reverse} touch each element only once.
+ \var{key} and \var{reverse} touch each element only once.
\versionchanged[Support for \code{None} as an equivalent to omitting
\var{cmpfunc} was added]{2.3}
- \versionadded[Support for \var{key} and \var{reverse} was added]{2.4}
+ \versionchanged[Support for \var{key} and \var{reverse} was added]{2.4}
\item[(9)] Starting with Python 2.3, the \method{sort()} method is
guaranteed to be stable. A sort is stable if it guarantees not to