'exceptions ON|OFF: If ON then detailed tracebacks are shown on exceptions (default OFF)
Normally when an exception occurs the error string only is
displayed.  However it is sometimes useful to get a full
traceback.  An example would be when you are developing
virtual tables and using the shell to exercise them.  In
addition to displaying each stack frame, the local variables
within each frame are also displayed.'

def command_exceptions(self, cmd):

    self.exceptions = self._boolean_command('exceptions', cmd)
