_normalize_env() — langchain Function Reference

Architecture documentation for the _normalize_env() function in shell_tool.py from the langchain codebase.

Function python LangChainCore MessageInterface called by 1

Entity Profile

LangChainCore→ MessageInterface→ _normalize_env() — langchain Function Reference

Dependency Diagram

graph TD
  048bbd8b_6ac4_806a_f4c0_f28cd49dcbd0["_normalize_env()"]
  4e57a0ff_f1a5_e2e9_6949_569d7cd6d70a["ShellToolMiddleware"]
  048bbd8b_6ac4_806a_f4c0_f28cd49dcbd0 -->|defined in| 4e57a0ff_f1a5_e2e9_6949_569d7cd6d70a
  bb8cdf05_0b11_e3e7_3c28_2a6ae5bfecb9["__init__()"]
  bb8cdf05_0b11_e3e7_3c28_2a6ae5bfecb9 -->|calls| 048bbd8b_6ac4_806a_f4c0_f28cd49dcbd0
  style 048bbd8b_6ac4_806a_f4c0_f28cd49dcbd0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/langchain/agents/middleware/shell_tool.py lines 616–625

    def _normalize_env(env: Mapping[str, Any] | None) -> dict[str, str] | None:
        if env is None:
            return None
        normalized: dict[str, str] = {}
        for key, value in env.items():
            if not isinstance(key, str):
                msg = "Environment variable names must be strings."  # type: ignore[unreachable]
                raise TypeError(msg)
            normalized[key] = str(value)
        return normalized