code: def tag():
      pass
  
imports: import sys
  from itertools import chain
  from metaflow import namespace
  from metaflow.client import Flow, Run
  from metaflow.current import current
  from metaflow.util import resolve_identity
  from metaflow.exception import CommandException, MetaflowNotFound, MetaflowInternalError
  from metaflow.exception import MetaflowNamespaceMismatch
  from metaflow._vendor import click
label_desc: Use image node_id 8 for calling a global function with example usage: tag() without return types