Official callback guide contains non-runnable Python examples

Page and affected package

• Official page linked from both repository READMEs: https://open.feishu.cn/document/server-side-sdk/python--sdk/handle-callbacks
• Page last-updated label observed on 2026-08-24: 2025-03-28
• Current package/default branch: lark-oapi 1.7.3 / 0b9e6e48b74bb4b34462fc67b7e738b27e73e697

Problem

Two current code examples on the official Python SDK callback page are not runnable as shown.

1. Persistent-connection example has a comment after a line continuation

The page shows this structure:

event_handler = lark.EventDispatcherHandler.builder("", "") \
    # Register callback handling functions with register_p2 as the prefix.
    .register_p2_card_action_trigger(do_card_action_trigger) \
    .register_p2_url_preview_get(do_url_preview_get) \
    .build()

A backslash cannot be followed by a comment line before the continued expression. Compiling the displayed code raises a SyntaxError at .register_p2_card_action_trigger(...).

2. Webhook example imports from a nonexistent top-level package

The Flask example uses:

from event.callback.model.p2_card_action_trigger import ...
from event.callback.model.p2_url_preview_get import ...

With lark-oapi 1.7.3 installed, those imports raise:

ModuleNotFoundError: No module named 'event'

The corresponding package paths are under lark_oapi.event.callback.model, and the persistent-connection example on the same page already uses that prefix.

Expected behavior

Every official quick-copy callback example should at least parse and import against the supported package version.

Suggested corrections

• Move the explanatory comment before the builder expression, or use parentheses instead of backslash continuation.
• Change both webhook imports to lark_oapi.event.callback.model....

I reloaded the deployed page and checked the current rendered examples rather than relying on cached text. I also searched open and closed issues, all pull request states, and repository history for the exact import and continuation symptoms. Issues #90, #112, and #126 concern callback payload/runtime behavior and do not cover these documentation errors.

Start with the official callback guide at the linked Feishu page and compare its persistent-connection and webhook examples with lark-oapi 1.7.3. Check the corrected snippets by compiling the persistent-connection example and importing the webhook models against the supported package. Done means both quick-copy examples parse and import without errors.