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google__adk-docs/examples/python/snippets/tools/overview/user_preference.py
2025-04-09 08:49:23 -07:00

22 lines
957 B
Python

from google.adk.tools import ToolContext, FunctionTool
def update_user_preference(preference: str, value: str, tool_context: ToolContext):
"""Updates a user-specific preference."""
user_prefs_key = "user:preferences"
# Get current preferences or initialize if none exist
preferences = tool_context.state.get(user_prefs_key, {})
preferences[preference] = value
# Write the updated dictionary back to the state
tool_context.state[user_prefs_key] = preferences
print(f"Tool: Updated user preference '{preference}' to '{value}'")
return {"status": "success", "updated_preference": preference}
pref_tool = FunctionTool(func=update_user_preference)
# In an Agent:
# my_agent = Agent(..., tools=[pref_tool])
# When the LLM calls update_user_preference(preference='theme', value='dark', ...):
# The tool_context.state will be updated, and the change will be part of the
# resulting tool response event's actions.state_delta.