diff options
Diffstat (limited to 'Doc/lib/libwarnings.tex')
| -rw-r--r-- | Doc/lib/libwarnings.tex | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Doc/lib/libwarnings.tex b/Doc/lib/libwarnings.tex index b7c7d63..573d99c 100644 --- a/Doc/lib/libwarnings.tex +++ b/Doc/lib/libwarnings.tex @@ -145,7 +145,10 @@ message to \code{sys.stderr}). \begin{funcdesc}{warn}{message\optional{, category\optional{, stacklevel}}} Issue a warning, or maybe ignore it or raise an exception. The \var{category} argument, if given, must be a warning category class -(see above); it defaults to \exception{UserWarning}. This function +(see above); it defaults to \exception{UserWarning}. Alternatively +\var{message} can be a \exception{Warning} instance, in which case +\var{category} will be ignore and \code{message.__class__} will be used. +In this case the message text will be \code{str(message)}. This function raises an exception if the particular warning issued is changed into an error by the warnings filter see above. The \var{stacklevel} argument can be used by wrapper functions written in Python, like @@ -169,6 +172,9 @@ filename and line number, and optionally the module name and the registry (which should be the \code{__warningregistry__} dictionary of the module). The module name defaults to the filename with \code{.py} stripped; if no registry is passed, the warning is never suppressed. +\var{message} must be a string and \var{category} a subclass of +\exception{Warning} or \var{message} may be a \exception{Warning} instance, +in which case \var{category} will be ignored. \end{funcdesc} \begin{funcdesc}{showwarning}{message, category, filename, |