code: def unparse_address(scheme: str, loc: str) -> str:
      """
      Undo parse_address().
  
      >>> unparse_address('tcp', '127.0.0.1')
      'tcp://127.0.0.1'
      """
      return f"{scheme}://{loc}"
  
file_path: distributed/distributed/comm/addressing.py
imports: from __future__ import annotations
  import itertools
  import dask
  from distributed.comm import registry
  from distributed.utils import get_ip_interface
label_desc: Use image node_id 2 for calling a global function with example usage: unparse_address(scheme, loc) and returns: scheme, str, loc