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modelcontextprotocol--pytho…/docs_src/subscriptions/tutorial003.py
T

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Python

from mcp import Client
from mcp.client.subscriptions import ResourceUpdated, ToolsListChanged
from mcp.types import TextResourceContents
BOARD = "board://sprint"
async def read_board(client: Client, uri: str = BOARD) -> str:
[contents] = (await client.read_resource(uri)).contents
assert isinstance(contents, TextResourceContents)
return contents.text
async def follow_board(client: Client) -> None:
async with client.listen(tools_list_changed=True, resource_subscriptions=[BOARD]) as sub:
async for event in sub:
match event:
case ResourceUpdated(uri=uri):
print(await read_board(client, uri))
case ToolsListChanged():
tools = await client.list_tools()
print("tools:", [tool.name for tool in tools.tools])
case _:
pass # kinds the filter did not ask for never arrive
async def main() -> None:
async with Client("http://localhost:8000/mcp") as client:
await follow_board(client)