python中pdb的中断控制

def stop_here(self, frame):
        # (CT) stopframe may now also be None, see dispatch_call.
        # (CT) the former test for None is therefore removed from here.
        if self.skip and \
               self.is_skipped_module(frame.f_globals.get('__name__')):
            return False
 
 
        # next
        if frame is self.stopframe:
            # stoplineno >= 0 means: stop at line >= the stoplineno
            # stoplineno -1 means: don't stop at all
            if self.stoplineno == -1:
                return False
            return frame.f_lineno >= self.stoplineno
 
 
        # step：当前只要追溯到botframe，就等待执行。
        while frame is not None and frame is not self.stopframe:
            if frame is self.botframe:
                return True
            frame = frame.f_back
        return False