cel_basic.py
"""Condition with CEL expression: route based on input content.
============================================================
Uses input.contains() to check whether the request is urgent,
branching to different agents via if/else steps.
Requirements:
pip install cel-python
"""
from agno.agent import Agent
from agno.models.openai import OpenAIChat
from agno.workflow import CEL_AVAILABLE, Condition, Step, Workflow
# ---------------------------------------------------------------------------
# Setup
# ---------------------------------------------------------------------------
if not CEL_AVAILABLE:
print("CEL is not available. Install with: pip install cel-python")
exit(1)
# ---------------------------------------------------------------------------
# Create Agents
# ---------------------------------------------------------------------------
urgent_handler = Agent(
name="Urgent Handler",
model=OpenAIChat(id="gpt-4o-mini"),
instructions="You handle urgent requests with high priority. Be concise and action-oriented.",
markdown=True,
)
normal_handler = Agent(
name="Normal Handler",
model=OpenAIChat(id="gpt-4o-mini"),
instructions="You handle normal requests thoroughly and thoughtfully.",
markdown=True,
)
# ---------------------------------------------------------------------------
# Create Workflow
# ---------------------------------------------------------------------------
workflow = Workflow(
name="CEL Input Routing",
steps=[
Condition(
name="Urgent Check",
evaluator='input.contains("urgent")',
steps=[
Step(name="Handle Urgent", agent=urgent_handler),
],
else_steps=[
Step(name="Handle Normal", agent=normal_handler),
],
),
],
)
# ---------------------------------------------------------------------------
# Run Workflow
# ---------------------------------------------------------------------------
if __name__ == "__main__":
print("--- Urgent request ---")
workflow.print_response(
input="This is an urgent request - please help immediately!"
)
print()
print("--- Normal request ---")
workflow.print_response(input="I have a general question about your services.")
Run the Example
1
Set up your virtual environment
uv venv --python 3.12
source .venv/bin/activate
uv venv --python 3.12
.venv\Scripts\activate
2
Install dependencies
uv pip install -U agno cel-python fastapi openai
3
Export your OpenAI API key
export OPENAI_API_KEY="your_openai_api_key_here"
$Env:OPENAI_API_KEY="your_openai_api_key_here"
4
Run the example
Save the code above as
cel_basic.py, then run:python cel_basic.py