\begin{funcdesc}{extract_tb}{traceback\optional{, limit}}

Return a list of up to \var{limit} ``pre-processed'' stack trace

entries extracted from \var{traceback}. It is useful for alternate

formatting of stack traces. If \var{limit} is omitted or \code{None},

all entries are extracted. A ``pre-processed'' stack trace entry is a

quadruple (\var{filename}, \var{line number}, \var{function name},

\var{line text}) representing the information that is usually printed

for a stack trace. The \var{line text} is a string with leading and

trailing whitespace stripped; if the source is not available it is

\code{None}.

\end{funcdesc}

\begin{funcdesc}{print_exception}{type, value,

traceback\optional{, limit\optional{, file}}}

\begin{funcdesc}{extract_tb}{tb\optional{, limit}}

Return a list containing the raw (unformatted) traceback information

extracted from the traceback object \var{tb}. The optional

\var{limit} argument has the same meaning as for

\function{print_exception()}. The items in the returned list are

4-tuples containing the following values: filename, line number,

function name, and source text line. The source text line is stripped

of leading and trailing whitespace; it is \code{None} when the source

text file is unavailable.