For more information, please see \helpref{Validator overview}{validatoroverview}.
\pythonnote{If you wish to create a validator class in wxPython you should
-derive the class from \tt{wxPyValidator} in order to get Python-aware
+derive the class from {\tt wxPyValidator} in order to get Python-aware
capabilities for the various virtual methods.}
\wxheading{Derived from}