Basic Agent Events

1"""
2Basic Agent Events
3=============================
4
5Basic Agent Events.
6"""
7
8import asyncio
9
10from kern.agent import RunEvent
11from kern.agent.agent import Agent
12from kern.models.openai import OpenAIResponses
13from kern.tools.yfinance import YFinanceTools
14
15# ---------------------------------------------------------------------------
16# Create Agent
17# ---------------------------------------------------------------------------
18finance_agent = Agent(
19    id="finance-agent",
20    name="Finance Agent",
21    model=OpenAIResponses(id="gpt-5.2"),
22    tools=[YFinanceTools()],
23)
24
25
26async def run_agent_with_events(prompt: str):
27    content_started = False
28    async for run_output_event in finance_agent.arun(
29        prompt,
30        stream=True,
31        stream_events=True,
32    ):
33        if run_output_event.event in [RunEvent.run_started, RunEvent.run_completed]:
34            print(f"\nEVENT: {run_output_event.event}")
35
36        if run_output_event.event in [RunEvent.tool_call_started]:
37            print(f"\nEVENT: {run_output_event.event}")
38            print(f"TOOL CALL: {run_output_event.tool.tool_name}")  # type: ignore
39            print(f"TOOL CALL ARGS: {run_output_event.tool.tool_args}")  # type: ignore
40
41        if run_output_event.event in [RunEvent.tool_call_completed]:
42            print(f"\nEVENT: {run_output_event.event}")
43            print(f"TOOL CALL: {run_output_event.tool.tool_name}")  # type: ignore
44            print(f"TOOL CALL RESULT: {run_output_event.tool.result}")  # type: ignore
45
46        if run_output_event.event in [RunEvent.run_content]:
47            if not content_started:
48                print("\nCONTENT:")
49                content_started = True
50            else:
51                print(run_output_event.content, end="")
52
53
54# ---------------------------------------------------------------------------
55# Run Agent
56# ---------------------------------------------------------------------------
57if __name__ == "__main__":
58    asyncio.run(
59        run_agent_with_events(
60            "What is the price of Apple stock?",
61        )
62    )

1# Clone and setup repo
2git clone https://github.com/kern-ai/kern.git
3cd kern/cookbook/02_agents/14_advanced
4
5# Create and activate virtual environment
6./scripts/demo_setup.sh
7source .venvs/demo/bin/activate
8
9python basic_agent_events.py