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How to Build a Simple gRPC-Style Data Service in Python

Create a beginner-friendly gRPC-style service with dataclasses to simulate GetUser and CreateUser RPCs.

from dataclasses import dataclass
from typing import Optional


@dataclass
class User:
    id: int
    name: str
    email: str


class UserService:
    """Simple gRPC-style service contract for beginner learners."""

    def get_user(self, user_id: int) -> Optional[User]:
        """Simulated gRPC GetUser RPC."""
   …

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