validate_environment() — langchain Function Reference

Architecture documentation for the validate_environment() function in chat_models.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ validate_environment() — langchain Function Reference

Dependency Diagram

graph TD
  a80b867b_128f_18d9_3eba_a7f3738e478e["validate_environment()"]
  36b59643_acfc_fb1d_752e_ae7ec32a79a4["ChatPerplexity"]
  a80b867b_128f_18d9_3eba_a7f3738e478e -->|defined in| 36b59643_acfc_fb1d_752e_ae7ec32a79a4
  style a80b867b_128f_18d9_3eba_a7f3738e478e fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/partners/perplexity/langchain_perplexity/chat_models.py lines 294–306

    def validate_environment(self) -> Self:
        """Validate that api key and python package exists in environment."""
        pplx_api_key = (
            self.pplx_api_key.get_secret_value() if self.pplx_api_key else None
        )

        if not self.client:
            self.client = Perplexity(api_key=pplx_api_key)

        if not self.async_client:
            self.async_client = AsyncPerplexity(api_key=pplx_api_key)

        return self