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

# Knowledge

> Answer questions from a PDF knowledge base in PgVector using a Perplexity sonar-pro agent.

```python knowledge.py theme={null}
"""Run `uv pip install ddgs sqlalchemy pgvector pypdf openai google.generativeai` to install dependencies."""

from agno.agent import Agent
from agno.knowledge.embedder.openai import OpenAIEmbedder
from agno.knowledge.knowledge import Knowledge
from agno.models.perplexity import Perplexity
from agno.vectordb.pgvector import PgVector

# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------

db_url = "postgresql+psycopg://ai:ai@localhost:5532/ai"

knowledge = Knowledge(
    vector_db=PgVector(
        table_name="recipes",
        db_url=db_url,
        embedder=OpenAIEmbedder(),
    ),
)
# Add content to the knowledge
knowledge.insert(url="https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf")

agent = Agent(model=Perplexity(id="sonar-pro"), knowledge=knowledge)
agent.print_response("How to make Thai curry?", markdown=True)

# ---------------------------------------------------------------------------
# Run Agent
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    pass
```

## Run the Example

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

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U agno openai pgvector psycopg-binary pypdf sqlalchemy
    ```
  </Step>

  <Step title="Export your Perplexity API key">
    <CodeGroup>
      ```bash Mac/Linux theme={null}
      export PERPLEXITY_API_KEY="your_perplexity_api_key_here"
      ```

      ```bash Windows theme={null}
      $Env:PERPLEXITY_API_KEY="your_perplexity_api_key_here"
      ```
    </CodeGroup>
  </Step>

  <Snippet file="run-pgvector-step.mdx" />

  <Step title="Run the example">
    Save the code above as `knowledge.py`, then run:

    ```bash theme={null}
    python knowledge.py
    ```
  </Step>
</Steps>

Full source: [cookbook/90\_models/perplexity/knowledge.py](https://github.com/agno-agi/agno/blob/main/cookbook/90_models/perplexity/knowledge.py)