• Replace any Python statement like from X import Y with the form import X and then replace the uses of Y with X.Y

• For aliased imports from X import Y as Z, convert to import X and replace all uses of Z with X.Y

• For nested module imports from X.Y import Z, convert to import X.Y and replace all uses of Z with X.Y.Z

• The only ones that can stay as from X import Y are:

  from __future__ import annotations
  from typing import Any, Dict, List, Optional, Tuple, Union, ...  (any typing name)
  from IPython.display import display
  from pathlib import Path
  

• Do not use

  # Re-export get_chat_model for backward compatibility.
  get_chat_model = langchain_API_utils.get_chat_model
  

  but replace all the callers

Verification

• Confirm no remaining from X import Y statements outside the allowed exceptions
• Confirm every use of the imported name is updated to X.Y (or X.Y.Z for nested modules)
• Confirm no backward-compatibility re-export aliases remain