appss-sdk 0.1.0

APPSS analytics SDK for Python (async, Telegram bots, servers)

appss-sdk

Async Python SDK for APPSS analytics — events, user properties, and super properties — designed for Telegram bots and server-side workloads.

Install

pip install appss-sdk
# or
uv add appss-sdk

Optional extras for Telegram framework integration:

pip install appss-sdk[aiogram]    # aiogram v3
pip install appss-sdk[ptb]        # python-telegram-bot v20+

Quickstart

import asyncio
from appss_sdk import create_appss


async def main() -> None:
    appss = create_appss({"api_key": "YOUR_API_KEY", "debug": True})

    appss.track(
        distinct_id="user_42",
        event="message_received",
        properties={"chat_type": "private", "text_length": 12},
    )

    appss.set_user_properties("user_42", {
        "platform": "telegram",
        "username": "alice",
    })

    await appss.flush()
    await appss.destroy()


asyncio.run(main())

AppssClient is async-only — it must be instantiated inside a running event loop (asyncio.run(...), aiogram polling, FastAPI lifespan, etc.). The constructor starts a background flush loop, so creating it without an active loop will fail.

aiogram v3 integration

from aiogram import Bot, Dispatcher
from aiogram.types import Message
from appss_sdk import create_appss
from appss_sdk.telegram import from_aiogram_message

dp = Dispatcher()
appss = create_appss({"api_key": "YOUR_API_KEY"})


@dp.message()
async def on_message(message: Message) -> None:
    ctx = from_aiogram_message(message)
    if ctx is None:
        return
    appss.set_user_properties(ctx.distinct_id, ctx.properties)
    appss.track(ctx.distinct_id, "message_received", {"length": len(message.text or "")})
    await message.answer("✓")


# Call await appss.destroy() when shutting the bot down.

python-telegram-bot v20+ integration

from telegram import Update
from telegram.ext import Application, MessageHandler, filters, ContextTypes
from appss_sdk import create_appss
from appss_sdk.telegram import from_ptb_update

app = Application.builder().token("BOT_TOKEN").build()
appss = create_appss({"api_key": "YOUR_API_KEY"})


async def on_message(update: Update, _: ContextTypes.DEFAULT_TYPE) -> None:
    ctx = from_ptb_update(update)
    if ctx is not None:
        appss.set_user_properties(ctx.distinct_id, ctx.properties)
        appss.track(ctx.distinct_id, "message_received")


app.add_handler(MessageHandler(filters.TEXT, on_message))
app.run_polling()

Configuration

Field	Type	Default	Description
api_key	str	—	Required. APPSS API key.
endpoint	str	https://appss-event-tracker-back-p.engagelabs.org	API endpoint.
flush_interval_ms	int	10_000	Automatic flush interval in milliseconds.
batch_size	int	50	Auto-flush threshold by event count.
max_queue_size	int	10_000	Maximum number of events buffered in memory.
request_timeout_ms	int	30_000	HTTP request timeout in milliseconds.
retry	RetryConfig	exp. backoff with jitter	Retry policy.
debug	bool	False	Log to stdout/stderr.
on_error	Callable[[AppssError], None | Awaitable[None]]	None	SDK error callback.
logger	ILogger	None	Custom logger implementation.
queue	IEventQueue	None	Custom queue (e.g. persistent).

RetryConfig accepts max_retries, base_backoff_ms, and max_backoff_ms. Every field is optional; defaults are filled in field by field.

Public API

from appss_sdk import (
    AppssClient,
    create_appss,
    AppssConfig,
    ResolvedConfig,
    RetryConfig,
    AppssError,
    ErrorCode,
    # ... concrete errors: ApiKeyRevokedError, NetworkError, etc.
    MemoryQueue,
    IEventQueue,
    ILogger,
    ITransport,
)
from appss_sdk.telegram import (
    from_aiogram_message,
    from_aiogram_callback,
    from_ptb_update,
    from_bot_api_update,
    ExtractedContext,
)

Telegram helpers are intentionally not re-exported at the root, so import appss_sdk does not pull aiogram/PTB into the import graph.

Client methods

• appss.track(distinct_id, event, properties=None) — enqueue an event.
• appss.set_user_property(distinct_id, key, value) — update a single user property.
• appss.set_user_properties(distinct_id, properties) — update multiple user properties in a single POST.
• appss.set_super_properties(properties) — register properties that are automatically attached to every subsequent track event.
• appss.reset_super_properties() — clear all super properties.
• await appss.flush() — force-send the queue.
• await appss.destroy() — flush, stop background tasks, and close the HTTP client.

Lifecycle

AppssClient automatically registers SIGTERM and SIGINT handlers that invoke flush() before the process exits (Linux/macOS). On Windows add_signal_handler is unavailable — registration is a no-op, and you must call await appss.destroy() explicitly before exit.

Custom queue

from appss_sdk import create_appss, MemoryQueue


def on_overflow(dropped: int) -> None:
    print(f"appss: dropped {dropped} events")


appss = create_appss({
    "api_key": "...",
    "queue": MemoryQueue(max_size=5000, on_overflow=on_overflow),
})

You can also implement your own IEventQueue (e.g. backed by Redis); the contract is enqueue / drain / peek / size / is_empty / clear.

Wire protocol

POST /api/v1/events with body {"batch": [{"event", "distinct_id", "$insert_id", "timestamp", "properties"}]}, where timestamp is ISO 8601 in UTC and $insert_id is a UUID v4.

POST /api/v1/user-properties with body {"distinct_id", "properties"}.

Headers added automatically:

• Authorization: Bearer <api_key>
• Content-Type: application/json
• X-Appss-Sdk: @appss-sdk/<version>
• X-Appss-Protocol-Version: 1

Retry and error semantics

Status	Action
2xx	Success — the batch is drained from the queue.
400	Drop + ProtocolError (batch is dropped, not retried).
401	Stop forever — ApiKeyRevokedError, subsequent sends are blocked.
413	Recursive binary split + retry (halves until it fits).
429	Wait Retry-After (or fall back to exponential backoff if the header is invalid).
5xx	Exponential backoff with jitter, up to retry.max_retries attempts.
Network exception	Retry up to retry.max_retries, then MaxRetriesExceededError.

All errors are delivered to the on_error(error) callback if one is configured.

License

Apache-2.0. See LICENSE.