diff options
Diffstat (limited to 'Doc/lib/libexcs.tex')
| -rw-r--r-- | Doc/lib/libexcs.tex | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/Doc/lib/libexcs.tex b/Doc/lib/libexcs.tex index d119ed9..631c798 100644 --- a/Doc/lib/libexcs.tex +++ b/Doc/lib/libexcs.tex @@ -23,14 +23,10 @@ an ``associated value'' indicating the detailed cause of the error. This may be a string or a tuple containing several items of information (e.g., an error code and a string explaining the code). The associated value is the second argument to the -\keyword{raise}\stindex{raise} statement. For string exceptions, the -associated value itself will be stored in the variable named as the -second argument of the \keyword{except} clause (if any). For class -exceptions, that variable receives the exception instance. If the -exception class is derived from the standard root class -\exception{BaseException}, the associated value is present as the -exception instance's \member{args} attribute. If there is a single argument -(as is preferred), it is bound to the \member{message} attribute. +\keyword{raise}\stindex{raise} statement. If the exception class is +derived from the standard root class \exception{BaseException}, the +associated value is present as the exception instance's \member{args} +attribute. User code can raise built-in exceptions. This can be used to test an exception handler or to report an error condition ``just like'' the @@ -56,14 +52,8 @@ The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined classes (for that use \exception{Exception}). If \function{str()} or \function{unicode()} is called on an instance of this class, the representation of the argument(s) to the instance are returned or -the emptry string when there were no arguments. If only a single argument is -passed in, it is stored in the \member{message} attribute. If more than one -argument is passed in, \member{message} is set to the empty string. These -semantics are meant to reflect the fact that \member{message} is to store a -text message explaining why the exception had been raised. If more data needs -to be attached to the exception, attach it through arbitrary attributes on the -instance. All arguments are also stored in \member{args} as a tuple, but it will -eventually be deprecated and thus its use is discouraged. +the emptry string when there were no arguments. All arguments are +stored in \member{args} as a tuple. \versionadded{2.5} \end{excdesc} |