validate_variable_names() — langchain Function Reference

Architecture documentation for the validate_variable_names() function in base.py from the langchain codebase.

Function python PromptManagement ExampleSelection

Entity Profile

PromptManagement→ ExampleSelection→ validate_variable_names() — langchain Function Reference

Dependency Diagram

graph TD
  d0343daa_9ffe_cb93_0bbc_1c193fa3e3d1["validate_variable_names()"]
  dddce6a3_2420_c71d_01fe_f214c3eb2503["BasePromptTemplate"]
  d0343daa_9ffe_cb93_0bbc_1c193fa3e3d1 -->|defined in| dddce6a3_2420_c71d_01fe_f214c3eb2503
  style d0343daa_9ffe_cb93_0bbc_1c193fa3e3d1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/base.py lines 79–104

    def validate_variable_names(self) -> Self:
        """Validate variable names do not include restricted names."""
        if "stop" in self.input_variables:
            msg = (
                "Cannot have an input variable named 'stop', as it is used internally,"
                " please rename."
            )
            raise ValueError(
                create_message(message=msg, error_code=ErrorCode.INVALID_PROMPT_INPUT)
            )
        if "stop" in self.partial_variables:
            msg = (
                "Cannot have an partial variable named 'stop', as it is used "
                "internally, please rename."
            )
            raise ValueError(
                create_message(message=msg, error_code=ErrorCode.INVALID_PROMPT_INPUT)
            )

        overall = set(self.input_variables).intersection(self.partial_variables)
        if overall:
            msg = f"Found overlapping input and partial variables: {overall}"
            raise ValueError(
                create_message(message=msg, error_code=ErrorCode.INVALID_PROMPT_INPUT)
            )
        return self