parser.py 文件源码

def __call__(self, parser, namespace, values, option_string=None):
        """Re-implementation of the base class method.

        See `argparse.Action` documentation for parameter description.
        """
        dest = getattr(namespace, self.dest)
        if dest is None:
            dest = []
            setattr(namespace, self.dest, dest)
        for componentLevel in values:
            component, sep, levelStr = componentLevel.partition("=")
            if not levelStr:
                levelStr, component = component, None
            logLevelUpr = levelStr.upper()
            if logLevelUpr not in self.permittedLevels:
                parser.error("loglevel=%s not one of %s" % (levelStr, tuple(self.permittedLevels)))
            dest.append((component, logLevelUpr))