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Updated Arbitrary callback_data (markdown)

Bibo-Joshi 2023-07-04 16:58:07 +02:00
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Arbitrary-callback_data.md

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The Telegrams Bot API only accepts strings with length up to 64 bytes as `callback_data` for `InlineKeyboardButtons`, which sometimes is quite a limitation.
With PTB, you are able to pass *any* object as `callback_data`. This is achieved by storing the object in a cache and passing a unique identifier for that object to Telegram. When a `CallbackQuery` is received, the id in the `callback_data` is replaced with the stored object. To use this feature, set the parameter `arbitrary_callback_data` for your `Updater` or `ext.Bot` instance to `True`. The cache that holds the stored data has limited size (more details on memory usage below). If the cache is full and objects from a new `lnlineKeyboardMarkup` need to be stored, it will discard the data for the least recently used keyboard.
With PTB, you are able to pass *any* object as `callback_data`. This is achieved by storing the object in a cache and passing a unique identifier for that object to Telegram. When a `CallbackQuery` is received, the id in the `callback_data` is replaced with the stored object. To use this feature, set [`Application.arbitrary_callback_data`](https://docs.python-telegram-bot.org/telegram.ext.applicationbuilder.html#telegram.ext.ApplicationBuilder.arbitrary_callback_data) to `True`. The cache that holds the stored data has limited size (more details on memory usage below). If the cache is full and objects from a new `lnlineKeyboardMarkup` need to be stored, it will discard the data for the least recently used keyboard.
This means two things for you: