newplugin.py 文件源码

def _validate_plugin_name(self, plugin_name):
        """
        To validate the given `plugin_name`.

        A `plugin_name` is considered valid if:

         + it's not empty.
         + it does not exist currently.

        Afterwards the attributes `self.plugin_name` and `self.label` will be
        set.
        """

        if not plugin_name:
            raise CommandError("You must provide a plugin_name.")

        try:
            importlib.import_module(plugin_name)

            raise CommandError(
                "The plugin_name %r is conflicted with another module, "
                "please specify a new one." % plugin_name)
        except ImportError:
            pass

        self.label = plugin_name.rsplit('.', 1)[-1]
        self.plugin_name = plugin_name