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modelcontextprotocol--pytho…/docs_src/handling_errors/tutorial002.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

17 lines
451 B
Python

from mcp_types import INVALID_PARAMS
from mcp import MCPError
from mcp.server import MCPServer
mcp = MCPServer("Bookshop")
CATALOG = {"Dune": "Frank Herbert", "Neuromancer": "William Gibson"}
@mcp.tool()
def get_author(title: str) -> str:
"""Look up the author of a book in the catalog."""
if title not in CATALOG:
raise MCPError(code=INVALID_PARAMS, message=f"No book titled {title!r} in the catalog.")
return CATALOG[title]