_validate_dataframe() — langchain Function Reference

Architecture documentation for the _validate_dataframe() function in pandas_dataframe.py from the langchain codebase.

Function python OutputParsing StreamingParsers

Entity Profile

OutputParsing→ StreamingParsers→ _validate_dataframe() — langchain Function Reference

Dependency Diagram

graph TD
  857c45f9_f55a_c767_8d26_7140fd3c5fae["_validate_dataframe()"]
  3637e9ea_cbb7_422b_bcb3_aa36c4e8aea5["PandasDataFrameOutputParser"]
  857c45f9_f55a_c767_8d26_7140fd3c5fae -->|defined in| 3637e9ea_cbb7_422b_bcb3_aa36c4e8aea5
  style 857c45f9_f55a_c767_8d26_7140fd3c5fae fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/output_parsers/pandas_dataframe.py lines 22–33

    def _validate_dataframe(cls, val: Any) -> Any:
        import pandas as pd

        if issubclass(type(val), pd.DataFrame):
            return val
        if pd.DataFrame(val).empty:
            msg = "DataFrame cannot be empty."
            raise ValueError(msg)

        msg = "Wrong type for 'dataframe', must be a subclass \
                of Pandas DataFrame (pd.DataFrame)"
        raise TypeError(msg)