@property
    def message(self):
        msg = '%(status)s'
        if self.status in defined_status:
            msg = '%(status)s %(defined_status)s'
        if 'web2py_error' in self.headers:
            msg += ' [%(web2py_error)s]'
        return msg % dict(
            status=self.status,
            defined_status=defined_status.get(self.status),
            web2py_error=self.headers.get('web2py_error'))
compose a message describing this exception
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/http.py/HTTP.message