unittest.py 文件源码

def _addexcinfo(self, rawexcinfo):
        # unwrap potential exception info (see twisted trial support below)
        rawexcinfo = getattr(rawexcinfo, '_rawexcinfo', rawexcinfo)
        try:
            excinfo = _pytest._code.ExceptionInfo(rawexcinfo)
        except TypeError:
            try:
                try:
                    l = traceback.format_exception(*rawexcinfo)
                    l.insert(0, "NOTE: Incompatible Exception Representation, "
                        "displaying natively:\n\n")
                    pytest.fail("".join(l), pytrace=False)
                except (pytest.fail.Exception, KeyboardInterrupt):
                    raise
                except:
                    pytest.fail("ERROR: Unknown Incompatible Exception "
                        "representation:\n%r" %(rawexcinfo,), pytrace=False)
            except KeyboardInterrupt:
                raise
            except pytest.fail.Exception:
                excinfo = _pytest._code.ExceptionInfo()
        self.__dict__.setdefault('_excinfo', []).append(excinfo)