log.py 文件源码

def set_debug(self, state):
        "Turn debugging on or off, remembering the last-set level"

        if state == self.forced_debug:
            self.debug("Debug signal ignored; already %sdebugging",
                       "" if state else "not ")

        if state:
            self.level(DEBUG, save=False)
            self.debug("Debug started")
        else:
            self.debug("Debug discontinued")
            self.level(self.last_level)

        self.forced_debug = state
        self.__update_env()