debugging.py 文件源码

def set_trace(self):
        """ invoke PDB set_trace debugging, dropping any IO capturing. """
        import _pytest.config
        frame = sys._getframe().f_back
        if self._pluginmanager is not None:
            capman = self._pluginmanager.getplugin("capturemanager")
            if capman:
                capman.suspendcapture(in_=True)
            tw = _pytest.config.create_terminal_writer(self._config)
            tw.line()
            tw.sep(">", "PDB set_trace (IO-capturing turned off)")
            self._pluginmanager.hook.pytest_enter_pdb(config=self._config)
        self._pdb_cls().set_trace(frame)