'AgentOutputSchema' object has no attribute '__mro__'

[RoniFinTech]

@x0day and @domino14 both your requests are now possible. See an example here for each:

https://github.com/openai/openai-agents-python/blob/main/examples/basic/non_strict_output_type.py

Originally posted by @rm-openai in #528

The above helped get past the Dict[str,any] issue, but now I'm seeing this error:
'AgentOutputSchema' object has no attribute 'mro'

I've tried downgrading/upgrading versions but no help.

I'm on pydantic 2.11.3
openai-agent 0.0.13

Any thoughts?

[rm-openai]

Can you share some code please?

[RoniFinTech]

Let's see if we can solve it with minimal code.

model:
openai-4o-mini

This is the definition of the supervisor agent:

class SupervisorResponse(BaseModel):
    """Structured output from the Supervisor Agent."""

    # response_to_user: str = Field(description="The final response to show to the user")
    processing_steps: List[str] = Field(..., description="Steps taken to process the query")
    items: List[dict] = Field(...,description="List of re-ranked items for the query.")

Agent definition:

model=settings.llm.OPENAI_MODEL_ID,
handoffs=[classifier_agent, search_agent, reranker_agent, response_agent],
tools=[get_conversation_history],
output_type=AgentOutputSchema(SupervisorResponse, strict_json_schema=False),

specialized agent:

class QueryType(str, Enum):
    """Types of queries that can be identified."""

    PRODUCT_SEARCH = "PRODUCT_SEARCH"
    OUTFIT_RECOMMENDATION = "OUTFIT_RECOMMENDATION"
    FASHION_ADVICE = "FASHION_ADVICE"
    BRAND_INQUIRY = "BRAND_INQUIRY"
    PRICE_COMPARISON = "PRICE_COMPARISON"
    GENERAL_QUESTION = "GENERAL_QUESTION"
    NON_FASHION = "NON_FASHION"


class ClassificationResult(BaseModel):
    """Result of a query classification."""

    query_type: QueryType = Field(..., description="The classified type of the query")
    confidence: float = Field(
        ..., description="Confidence score for the classification. score between 0.0 and 1.0"
    )
    is_fashion_query: bool = Field(..., description="Whether the query is related to fashion")
    reasoning: str = Field(..., description="Reasoning behind the classification")

Agent definition:

model=settings.llm.OPENAI_MODEL_ID,
output_type=AgentOutputSchema(ClassificationResult, strict_json_schema=False),

[rm-openai]

and can you also share the stack trace where you see that error?

[RoniFinTech]

and can you also share the stack trace where you see that error?

It doesn't show much.
trace_id: trace_ddf7f7d8993e47629ad4a335ae71bc87

[rm-openai]

Oh sorry I meant the Python stack trace (the full error message with all lines)

[RoniFinTech]

Oh sorry I meant the Python stack trace (the full error message with all lines)

this is the only thing I'm seeing:

Error in supervisor agent: 'AgentOutputSchema' object has no attribute '__mro__'

[RoniFinTech]

ahh looks like it was a venv problem...
I created a new one and the error went away.

thanks!!