session.py 文件源码

def update_default_setting(self, key_tree, value):
        """
        Update a default value in the local settings file.

        :param key_tree:
            A tuple containing a tree of dictionary keys.

        :param value:
            The value for the setting.
        """

        # Open the defaults.
        with open(self._default_settings_path, "rb") as fp:
            defaults = yaml.load(fp)

        branch = defaults
        for key in key_tree[:-1]:
            branch.setdefault(key, {})
            branch = branch[key]
        branch[key_tree[-1]] = value

        with open(self._default_settings_path, "w") as fp:
            fp.write(yaml.dump(defaults))

        return True