code.py 文件源码

def cut(self, path=None, lineno=None, firstlineno=None, excludepath=None):
        """ return a Traceback instance wrapping part of this Traceback

            by provding any combination of path, lineno and firstlineno, the
            first frame to start the to-be-returned traceback is determined

            this allows cutting the first part of a Traceback instance e.g.
            for formatting reasons (removing some uninteresting bits that deal
            with handling of the exception/traceback)
        """
        for x in self:
            code = x.frame.code
            codepath = code.path
            if ((path is None or codepath == path) and
                (excludepath is None or not hasattr(codepath, 'relto') or
                 not codepath.relto(excludepath)) and
                (lineno is None or x.lineno == lineno) and
                (firstlineno is None or x.frame.code.firstlineno == firstlineno)):
                return Traceback(x._rawentry, self._excinfo)
        return self