init() — langchain Function Reference

Architecture documentation for the __init__() function in entity.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 1

Entity Profile

LangChainCore→ MessageInterface→ __init__() — langchain Function Reference

Dependency Diagram

graph TD
  28535b08_6603_aa75_f05d_abb90636cd88["__init__()"]
  40387f29_12a3_f291_fc18_4ce17ac91db3["SQLiteEntityStore"]
  28535b08_6603_aa75_f05d_abb90636cd88 -->|defined in| 40387f29_12a3_f291_fc18_4ce17ac91db3
  4913d94d_bd60_eefc_8e42_e5664da21e4e["_create_table_if_not_exists()"]
  28535b08_6603_aa75_f05d_abb90636cd88 -->|calls| 4913d94d_bd60_eefc_8e42_e5664da21e4e
  style 28535b08_6603_aa75_f05d_abb90636cd88 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/memory/entity.py lines 354–390

    def __init__(
        self,
        session_id: str = "default",
        db_file: str = "entities.db",
        table_name: str = "memory_store",
        *args: Any,
        **kwargs: Any,
    ):
        """Initializes the SQLiteEntityStore.

        Args:
            session_id: Unique identifier for the session.
            db_file: Path to the SQLite database file.
            table_name: Name of the table to store entities.
            *args: Additional positional arguments.
            **kwargs: Additional keyword arguments.
        """
        super().__init__(*args, **kwargs)
        try:
            import sqlite3
        except ImportError as e:
            msg = (
                "Could not import sqlite3 python package. "
                "Please install it with `pip install sqlite3`."
            )
            raise ImportError(msg) from e

        # Basic validation to prevent obviously malicious table/session names
        if not table_name.isidentifier() or not session_id.isidentifier():
            # Since we validate here, we can safely suppress the S608 bandit warning
            msg = "Table name and session ID must be valid Python identifiers."
            raise ValueError(msg)

        self.conn = sqlite3.connect(db_file)
        self.session_id = session_id
        self.table_name = table_name
        self._create_table_if_not_exists()