> ## Documentation Index
> Fetch the complete documentation index at: https://agno-v2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Expected Output

> Guide agent responses using the expected_output parameter.

```python expected_output.py theme={null}
"""
Expected Output
=============================

Guide agent responses using the expected_output parameter.
"""

from agno.agent import Agent
from agno.models.openai import OpenAIResponses

# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------
agent = Agent(
    model=OpenAIResponses(id="gpt-5.2"),
    # expected_output gives the agent a clear target for what the response should look like
    expected_output="A numbered list of exactly 5 items, each with a title and one-sentence description.",
    markdown=True,
)

# ---------------------------------------------------------------------------
# Run Agent
# ---------------------------------------------------------------------------
if __name__ == "__main__":
    agent.print_response(
        "What are the most important principles of clean code?",
        stream=True,
    )
```

## Run the Example

<Snippet file="create-venv-step.mdx" />

**1. Install dependencies**

```bash theme={null}
uv pip install -U agno openai
```

**2. Export your OpenAI API key**

```bash Mac/Linux theme={null}
export OPENAI_API_KEY="your_openai_api_key_here"
```

```bash Windows theme={null}
$Env:OPENAI_API_KEY="your_openai_api_key_here"
```

**3. Run the example**

Save the code above as `expected_output.py`, then run:

```bash theme={null}
python expected_output.py
```

Full source: [cookbook/02\_agents/02\_input\_output/expected\_output.py](https://github.com/agno-agi/agno/blob/v3.0.4/cookbook/02_agents/02_input_output/expected_output.py)


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