dspy.JSONAdapter

dspy.JSONAdapter(callbacks: Optional[list[BaseCallback]] = None)

Bases: ChatAdapter

源代码位于 dspy/adapters/chat_adapter.py

def __init__(self, callbacks: Optional[list[BaseCallback]] = None):
    super().__init__(callbacks)

函数

__call__(lm: LM, lm_kwargs: dict[str, Any], signature: Type[Signature], demos: list[dict[str, Any]], inputs: dict[str, Any]) -> list[dict[str, Any]]

源代码位于 dspy/adapters/json_adapter.py

def __call__(
    self,
    lm: LM,
    lm_kwargs: dict[str, Any],
    signature: Type[Signature],
    demos: list[dict[str, Any]],
    inputs: dict[str, Any],
) -> list[dict[str, Any]]:
    provider = lm.model.split("/", 1)[0] or "openai"
    params = litellm.get_supported_openai_params(model=lm.model, custom_llm_provider=provider)

    # If response_format is not supported, use basic call
    if not params or "response_format" not in params:
        return super().__call__(lm, lm_kwargs, signature, demos, inputs)

    # Check early for open-ended mapping types before trying structured outputs.
    if _has_open_ended_mapping(signature):
        lm_kwargs["response_format"] = {"type": "json_object"}
        return super().__call__(lm, lm_kwargs, signature, demos, inputs)

    # Try structured output first, fall back to basic JSON if it fails.
    try:
        structured_output_model = _get_structured_outputs_response_format(signature)
        lm_kwargs["response_format"] = structured_output_model
        return super().__call__(lm, lm_kwargs, signature, demos, inputs)
    except Exception:
        logger.warning("Failed to use structured output format, falling back to JSON mode.")
        try:
            lm_kwargs["response_format"] = {"type": "json_object"}
            return super().__call__(lm, lm_kwargs, signature, demos, inputs)
        except AdapterParseError as e:
            # On AdapterParseError, we raise the original error.
            raise e
        except Exception as e:
            # On any other error, we raise a RuntimeError with the original error message.
            raise RuntimeError(
                "Both structured output format and JSON mode failed. Please choose a model that supports "
                f"`response_format` argument. Original error: {e}"
            ) from e

acall(lm: LM, lm_kwargs: dict[str, Any], signature: Type[Signature], demos: list[dict[str, Any]], inputs: dict[str, Any]) -> list[dict[str, Any]] 异步

源代码位于 dspy/adapters/base.py

async def acall(
    self,
    lm: "LM",
    lm_kwargs: dict[str, Any],
    signature: Type[Signature],
    demos: list[dict[str, Any]],
    inputs: dict[str, Any],
) -> list[dict[str, Any]]:
    inputs = self.format(signature, demos, inputs)

    outputs = await lm.acall(messages=inputs, **lm_kwargs)
    return self._call_post_process(outputs, signature)

format(signature: Type[Signature], demos: list[dict[str, Any]], inputs: dict[str, Any]) -> list[dict[str, Any]]

格式化用于 LM 调用的输入消息。

此方法将 DSPy 结构化输入以及少样本示例和对话历史记录转换为 LM 期望的多轮消息。对于自定义适配器，可以覆盖此方法以自定义输入消息的格式。

通常，我们建议消息采用以下结构：

[
    {"role": "system", "content": system_message},
    # Begin few-shot examples
    {"role": "user", "content": few_shot_example_1_input},
    {"role": "assistant", "content": few_shot_example_1_output},
    {"role": "user", "content": few_shot_example_2_input},
    {"role": "assistant", "content": few_shot_example_2_output},
    ...
    # End few-shot examples
    # Begin conversation history
    {"role": "user", "content": conversation_history_1_input},
    {"role": "assistant", "content": conversation_history_1_output},
    {"role": "user", "content": conversation_history_2_input},
    {"role": "assistant", "content": conversation_history_2_output},
    ...
    # End conversation history
    {"role": "user", "content": current_input},
]

And system message should contain the field description, field structure, and task description.

参数

名称	类型	描述	默认值
signature	Type[Signature]	要格式化输入消息的 DSPy 签名。	必需
demos	list[dict[str, Any]]	少样本示例列表。	必需
inputs	dict[str, Any]	DSPy 模块的输入参数。	必需

返回值

类型	描述
list[dict[str, Any]]	LM 期望的多轮消息列表。

源代码位于 dspy/adapters/base.py

def format(
    self,
    signature: Type[Signature],
    demos: list[dict[str, Any]],
    inputs: dict[str, Any],
) -> list[dict[str, Any]]:
    """Format the input messages for the LM call.

    This method converts the DSPy structured input along with few-shot examples and conversation history into
    multiturn messages as expected by the LM. For custom adapters, this method can be overridden to customize
    the formatting of the input messages.

    In general we recommend the messages to have the following structure:
    ```
    [
        {"role": "system", "content": system_message},
        # Begin few-shot examples
        {"role": "user", "content": few_shot_example_1_input},
        {"role": "assistant", "content": few_shot_example_1_output},
        {"role": "user", "content": few_shot_example_2_input},
        {"role": "assistant", "content": few_shot_example_2_output},
        ...
        # End few-shot examples
        # Begin conversation history
        {"role": "user", "content": conversation_history_1_input},
        {"role": "assistant", "content": conversation_history_1_output},
        {"role": "user", "content": conversation_history_2_input},
        {"role": "assistant", "content": conversation_history_2_output},
        ...
        # End conversation history
        {"role": "user", "content": current_input},
    ]

    And system message should contain the field description, field structure, and task description.
    ```


    Args:
        signature: The DSPy signature for which to format the input messages.
        demos: A list of few-shot examples.
        inputs: The input arguments to the DSPy module.

    Returns:
        A list of multiturn messages as expected by the LM.
    """
    inputs_copy = dict(inputs)

    # If the signature and inputs have conversation history, we need to format the conversation history and
    # remove the history field from the signature.
    history_field_name = self._get_history_field_name(signature)
    if history_field_name:
        # In order to format the conversation history, we need to remove the history field from the signature.
        signature_without_history = signature.delete(history_field_name)
        conversation_history = self.format_conversation_history(
            signature_without_history,
            history_field_name,
            inputs_copy,
        )

    messages = []
    system_message = (
        f"{self.format_field_description(signature)}\n"
        f"{self.format_field_structure(signature)}\n"
        f"{self.format_task_description(signature)}"
    )
    messages.append({"role": "system", "content": system_message})
    messages.extend(self.format_demos(signature, demos))
    if history_field_name:
        # Conversation history and current input
        content = self.format_user_message_content(signature_without_history, inputs_copy, main_request=True)
        messages.extend(conversation_history)
        messages.append({"role": "user", "content": content})
    else:
        # Only current input
        content = self.format_user_message_content(signature, inputs_copy, main_request=True)
        messages.append({"role": "user", "content": content})

    messages = split_message_content_for_custom_types(messages)
    return messages

format_assistant_message_content(signature: Type[Signature], outputs: dict[str, Any], missing_field_message=None) -> str

源代码位于 dspy/adapters/json_adapter.py

def format_assistant_message_content(
    self,
    signature: Type[Signature],
    outputs: dict[str, Any],
    missing_field_message=None,
) -> str:
    fields_with_values = {
        FieldInfoWithName(name=k, info=v): outputs.get(k, missing_field_message)
        for k, v in signature.output_fields.items()
    }
    return self.format_field_with_value(fields_with_values, role="assistant")

format_conversation_history(signature: Type[Signature], history_field_name: str, inputs: dict[str, Any]) -> list[dict[str, Any]]

格式化对话历史记录。

此方法将对话历史记录和当前输入格式化为多轮消息。

参数

名称	类型	描述	默认值
signature	Type[Signature]	要格式化对话历史记录的 DSPy 签名。	必需
history_field_name	str	签名中历史记录字段的名称。	必需
inputs	dict[str, Any]	DSPy 模块的输入参数。	必需

返回值

类型	描述
list[dict[str, Any]]	多轮消息列表。

源代码位于 dspy/adapters/base.py

def format_conversation_history(
    self,
    signature: Type[Signature],
    history_field_name: str,
    inputs: dict[str, Any],
) -> list[dict[str, Any]]:
    """Format the conversation history.

    This method formats the conversation history and the current input as multiturn messages.

    Args:
        signature: The DSPy signature for which to format the conversation history.
        history_field_name: The name of the history field in the signature.
        inputs: The input arguments to the DSPy module.

    Returns:
        A list of multiturn messages.
    """
    conversation_history = inputs[history_field_name].messages if history_field_name in inputs else None

    if conversation_history is None:
        return []

    messages = []
    for message in conversation_history:
        messages.append(
            {
                "role": "user",
                "content": self.format_user_message_content(signature, message),
            }
        )
        messages.append(
            {
                "role": "assistant",
                "content": self.format_assistant_message_content(signature, message),
            }
        )

    # Remove the history field from the inputs
    del inputs[history_field_name]

    return messages

format_demos(signature: Type[Signature], demos: list[dict[str, Any]]) -> list[dict[str, Any]]

格式化少样本示例。

此方法将少样本示例格式化为多轮消息。

参数

名称	类型	描述	默认值
signature	Type[Signature]	要格式化少样本示例的 DSPy 签名。	必需
demos	list[dict[str, Any]]	少样本示例列表，每个元素是一个字典，其键为签名的输入字段和输出字段。	必需

返回值

类型	描述
list[dict[str, Any]]	多轮消息列表。

源代码位于 dspy/adapters/base.py

def format_demos(self, signature: Type[Signature], demos: list[dict[str, Any]]) -> list[dict[str, Any]]:
    """Format the few-shot examples.

    This method formats the few-shot examples as multiturn messages.

    Args:
        signature: The DSPy signature for which to format the few-shot examples.
        demos: A list of few-shot examples, each element is a dictionary with keys of the input and output fields of
            the signature.

    Returns:
        A list of multiturn messages.
    """
    complete_demos = []
    incomplete_demos = []

    for demo in demos:
        # Check if all fields are present and not None
        is_complete = all(k in demo and demo[k] is not None for k in signature.fields)

        # Check if demo has at least one input and one output field
        has_input = any(k in demo for k in signature.input_fields)
        has_output = any(k in demo for k in signature.output_fields)

        if is_complete:
            complete_demos.append(demo)
        elif has_input and has_output:
            # We only keep incomplete demos that have at least one input and one output field
            incomplete_demos.append(demo)

    messages = []

    incomplete_demo_prefix = "This is an example of the task, though some input or output fields are not supplied."
    for demo in incomplete_demos:
        messages.append(
            {
                "role": "user",
                "content": self.format_user_message_content(signature, demo, prefix=incomplete_demo_prefix),
            }
        )
        messages.append(
            {
                "role": "assistant",
                "content": self.format_assistant_message_content(
                    signature, demo, missing_field_message="Not supplied for this particular example. "
                ),
            }
        )

    for demo in complete_demos:
        messages.append({"role": "user", "content": self.format_user_message_content(signature, demo)})
        messages.append(
            {
                "role": "assistant",
                "content": self.format_assistant_message_content(
                    signature, demo, missing_field_message="Not supplied for this conversation history message. "
                ),
            }
        )

    return messages

format_field_description(signature: Type[Signature]) -> str

源代码位于 dspy/adapters/chat_adapter.py

def format_field_description(self, signature: Type[Signature]) -> str:
    return (
        f"Your input fields are:\n{get_field_description_string(signature.input_fields)}\n"
        f"Your output fields are:\n{get_field_description_string(signature.output_fields)}"
    )

format_field_structure(signature: Type[Signature]) -> str

源代码位于 dspy/adapters/json_adapter.py

def format_field_structure(self, signature: Type[Signature]) -> str:
    parts = []
    parts.append("All interactions will be structured in the following way, with the appropriate values filled in.")

    def format_signature_fields_for_instructions(fields: Dict[str, FieldInfo], role: str):
        return self.format_field_with_value(
            fields_with_values={
                FieldInfoWithName(name=field_name, info=field_info): translate_field_type(field_name, field_info)
                for field_name, field_info in fields.items()
            },
            role=role,
        )

    parts.append("Inputs will have the following structure:")
    parts.append(format_signature_fields_for_instructions(signature.input_fields, role="user"))
    parts.append("Outputs will be a JSON object with the following fields.")
    parts.append(format_signature_fields_for_instructions(signature.output_fields, role="assistant"))
    return "\n\n".join(parts).strip()

format_field_with_value(fields_with_values: Dict[FieldInfoWithName, Any], role: str = 'user') -> str

根据字段的 DSPy 类型（输入或输出）、注释（例如 str、int 等）以及值本身的类型来格式化指定字段的值。将格式化后的值合并成一个字符串，如果存在多个字段，则该字符串是多行字符串。

参数

名称	类型	描述	默认值
fields_with_values	Dict[FieldInfoWithName, Any]	一个字典，将字段信息映射到其对应的值。	必需

返回值：字段的合并格式化值，表示为字符串。

源代码位于 dspy/adapters/json_adapter.py

def format_field_with_value(self, fields_with_values: Dict[FieldInfoWithName, Any], role: str = "user") -> str:
    """
    Formats the values of the specified fields according to the field's DSPy type (input or output),
    annotation (e.g. str, int, etc.), and the type of the value itself. Joins the formatted values
    into a single string, which is a multiline string if there are multiple fields.

    Args:
        fields_with_values: A dictionary mapping information about a field to its corresponding value.
    Returns:
        The joined formatted values of the fields, represented as a string.
    """
    if role == "user":
        output = []
        for field, field_value in fields_with_values.items():
            formatted_field_value = format_field_value(field_info=field.info, value=field_value)
            output.append(f"[[ ## {field.name} ## ]]\n{formatted_field_value}")
        return "\n\n".join(output).strip()
    else:
        d = fields_with_values.items()
        d = {k.name: v for k, v in d}
        return json.dumps(serialize_for_json(d), indent=2)

format_finetune_data(signature: Type[Signature], demos: list[dict[str, Any]], inputs: dict[str, Any], outputs: dict[str, Any]) -> dict[str, list[Any]]

源代码位于 dspy/adapters/json_adapter.py

def format_finetune_data(
    self, signature: Type[Signature], demos: list[dict[str, Any]], inputs: dict[str, Any], outputs: dict[str, Any]
) -> dict[str, list[Any]]:
    # TODO: implement format_finetune_data method in JSONAdapter
    raise NotImplementedError

format_task_description(signature: Type[Signature]) -> str

源代码位于 dspy/adapters/chat_adapter.py

def format_task_description(self, signature: Type[Signature]) -> str:
    instructions = textwrap.dedent(signature.instructions)
    objective = ("\n" + " " * 8).join([""] + instructions.splitlines())
    return f"In adhering to this structure, your objective is: {objective}"

format_user_message_content(signature: Type[Signature], inputs: dict[str, Any], prefix: str = '', suffix: str = '', main_request: bool = False) -> str

源代码位于 dspy/adapters/chat_adapter.py

def format_user_message_content(
    self,
    signature: Type[Signature],
    inputs: dict[str, Any],
    prefix: str = "",
    suffix: str = "",
    main_request: bool = False,
) -> str:
    messages = [prefix]
    for k, v in signature.input_fields.items():
        if k in inputs:
            value = inputs.get(k)
            formatted_field_value = format_field_value(field_info=v, value=value)
            messages.append(f"[[ ## {k} ## ]]\n{formatted_field_value}")

    if main_request:
        output_requirements = self.user_message_output_requirements(signature)
        if output_requirements is not None:
            messages.append(output_requirements)

    messages.append(suffix)
    return "\n\n".join(messages).strip()

parse(signature: Type[Signature], completion: str) -> dict[str, Any]

源代码位于 dspy/adapters/json_adapter.py

def parse(self, signature: Type[Signature], completion: str) -> dict[str, Any]:
    pattern = r"\{(?:[^{}]|(?R))*\}"
    match = regex.search(pattern, completion, regex.DOTALL)
    if match:
        completion = match.group(0)
    fields = json_repair.loads(completion)

    if not isinstance(fields, dict):
        raise AdapterParseError(
            adapter_name="JSONAdapter",
            signature=signature,
            lm_response=completion,
            message="LM response cannot be serialized to a JSON object.",
        )

    fields = {k: v for k, v in fields.items() if k in signature.output_fields}

    # Attempt to cast each value to type signature.output_fields[k].annotation.
    for k, v in fields.items():
        if k in signature.output_fields:
            fields[k] = parse_value(v, signature.output_fields[k].annotation)

    if fields.keys() != signature.output_fields.keys():
        raise AdapterParseError(
            adapter_name="JSONAdapter",
            signature=signature,
            lm_response=completion,
            parsed_result=fields,
        )

    return fields

user_message_output_requirements(signature: Type[Signature]) -> str

源代码位于 dspy/adapters/json_adapter.py

def user_message_output_requirements(self, signature: Type[Signature]) -> str:
    def type_info(v):
        return (
            f" (must be formatted as a valid Python {get_annotation_name(v.annotation)})"
            if v.annotation is not str
            else ""
        )

    message = "Respond with a JSON object in the following order of fields: "
    message += ", then ".join(f"`{f}`{type_info(v)}" for f, v in signature.output_fields.items())
    message += "."
    return message