backend.py 文件源码

def encode_tile_key(self, project_info, resolution, x_index, y_index, z_index, t_index=0):
        """A method to create a tile key.

        The tile key is the key used for each individual tile file.

        Args:
            project_info(list): A list of strings containing the project/data model information for where data belongs
            resolution(int): The level of the resolution hierarchy.  Typically 0
            x_index(int): The x tile index
            y_index(int): The y tile index
            z_index(int): The z tile index
            t_index(int): The time index

        Returns:
            (str): The object key to use for uploading to the tile bucket
        """
        proj_str = six.u("&".join([str(x) for x in project_info]))
        base_key = six.u("{}&{}&{}&{}&{}&{}".format(proj_str, resolution, x_index, y_index, z_index, t_index))

        hashm = hashlib.md5()
        hashm.update(base_key.encode())

        return six.u("{}&{}".format(hashm.hexdigest(), base_key))