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# Source code for langchain.agents.format_scratchpad.log

    from typing import List, Tuple

    from langchain_core.agents import AgentAction

    def format_log_to_str(
        intermediate_steps: List[Tuple[AgentAction, str]],
        observation_prefix: str = "Observation: ",
        llm_prefix: str = "Thought: ",
    ) -> str:
        """Construct the scratchpad that lets the agent continue its thought process."""
        thoughts = ""
        for action, observation in intermediate_steps:
            thoughts += action.log
            thoughts += f"\n{observation_prefix}{observation}\n{llm_prefix}"
        return thoughts