Python nodes run restricted scripts during a turn. Use them to transform variables, compute branches, or format messages when declarative nodes are not enough.
Session access
Scripts read and write session variables through the provided context object. Avoid network calls — use Tool nodes for HTTP.
Execution trace
Successful script runs appear in the simulator trace even when they produce no user-visible message, so you can confirm the step executed.
# Example: format a balance message
balance = session.get("account_balance", 0)
session["message"] = f"Your balance is {balance:.2f}"