Change State on Run

This example demonstrates how to set and manage session state for different users and sessions. It shows how session state can be passed during runs and persists across multiple interactions within the same session.

Create a Python file

1from kern.db.in_memory import InMemoryDb
2    from kern.models.openai import OpenAIResponses
3    from kern.team import Team
4
5    team = Team(
6        db=InMemoryDb(),
7        model=OpenAIResponses(id="gpt-5.2"),
8        members=[],
9        instructions="Users name is {user_name} and age is {age}",
10    )
11
12    # Sets the session state for the session with the id "user_1_session_1"
13    team.print_response(
14        "What is my name?",
15        session_id="user_1_session_1",
16        user_id="user_1",
17        session_state={"user_name": "John", "age": 30},
18    )
19
20    # Will load the session state from the session with the id "user_1_session_1"
21    team.print_response("How old am I?", session_id="user_1_session_1", user_id="user_1")
22
23    # Sets the session state for the session with the id "user_2_session_1"
24    team.print_response(
25        "What is my name?",
26        session_id="user_2_session_1",
27        user_id="user_2",
28        session_state={"user_name": "Jane", "age": 25},
29    )
30
31    # Will load the session state from the session with the id "user_2_session_1"
32team.print_response("How old am I?", session_id="user_2_session_1", user_id="user_2")

Set up your virtual environment

1uv venv --python 3.12
2source .venv/bin/activate

1uv venv --python 3.12
2.venv\Scripts\activate

Install dependencies

1uv pip install -U kern-ai openai

Export your OpenAI API key

Set OpenAI Key

Set your OPENAI_API_KEY as an environment variable. You can get one from OpenAI.

1export OPENAI_API_KEY=sk-***

1setx OPENAI_API_KEY sk-***

Run Team

1python change_state_on_run.py