Reference library

Streaming & messaging

Kafka-style pub/sub, event consumers, async pipelines, and message-driven workflows.

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Streaming & messaging hard

Mock Protobuf Binary Encoding in Python

Demonstrates a minimal protobuf-like binary encoding and decoding of an event dataclass using varints and length-delimited fields in pure Python.

protobuf binary-encoding varint
Python 
import struct
from dataclasses import dataclass


@dataclass
class Event:
    id: int
    user_id: int
    action: str

    def encode(self) -> bytes:
        # Mock protobuf-like binary encoding using varint and length-delimited fields
        buf = bytearray()
        # field 1: varint id (tag = (1 << 3) | 0 = 8)
  …
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