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243 lines
7.8 KiB
ReStructuredText
243 lines
7.8 KiB
ReStructuredText
.. _faq:
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===
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FAQ
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===
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Let's start the quick references section with some useful tips to keep in
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mind, with the hope that you will understand why certain things work the
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way that they do.
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.. contents::
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Code without errors doesn't work
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================================
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Then it probably has errors, but you haven't enabled logging yet.
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To enable logging, at the following code to the top of your main file:
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.. code-block:: python
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import logging
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logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s',
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level=logging.WARNING)
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You can change the logging level to be something different, from less to more information:
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.. code-block:: python
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level=logging.CRITICAL # won't show errors (same as disabled)
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level=logging.ERROR # will only show errors that you didn't handle
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level=logging.WARNING # will also show messages with medium severity, such as internal Telegram issues
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level=logging.INFO # will also show informational messages, such as connection or disconnections
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level=logging.DEBUG # will show a lot of output to help debugging issues in the library
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See the official Python documentation for more information on logging_.
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How can I except FloodWaitError?
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================================
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You can use all errors from the API by importing:
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.. code-block:: python
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from telethon import errors
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And except them as such:
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.. code-block:: python
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try:
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client.send_message(chat, 'Hi')
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except errors.FloodWaitError as e:
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# e.seconds is how many seconds you have
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# to wait before making the request again.
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print('Flood for', e.seconds)
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My account was deleted/limited when using the library
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=====================================================
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The library will only do things that you tell it to do. If you use
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the library with bad intentions, Telegram will hopefully ban you.
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However, you may also be part of a limited country, such as Iran or Russia.
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In that case, we have bad news for you. Telegram is much more likely to ban
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these numbers, as they are often used to spam other accounts, likely through
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the use of libraries like this one. The best advice we can give you is to not
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abuse the API, like calling many requests really quickly, and to sign up with
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these phones through an official application.
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We have also had reports from Kazakhstan and China, where connecting
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would fail. To solve these connection problems, you should use a proxy.
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Telegram may also ban virtual (VoIP) phone numbers,
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as again, they're likely to be used for spam.
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If you want to check if your account has been limited,
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simply send a private message to `@SpamBot`_ through Telegram itself.
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You should notice this by getting errors like ``PeerFloodError``,
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which means you're limited, for instance,
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when sending a message to some accounts but not others.
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For more discussion, please see `issue 297`_.
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How can I use a proxy?
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======================
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This was one of the first things described in :ref:`signing-in`.
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How do I access a field?
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========================
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This is basic Python knowledge. You should use the dot operator:
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.. code-block:: python
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me = client.get_me()
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print(me.username)
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# ^ we used the dot operator to access the username attribute
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result = client(functions.photos.GetUserPhotosRequest(
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user_id='me',
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offset=0,
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max_id=0,
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limit=100
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))
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# Working with list is also pretty basic
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print(result.photos[0].sizes[-1].type)
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# ^ ^ ^ ^ ^
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# | | | | \ type
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# | | | \ last size
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# | | \ list of sizes
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# access | \ first photo from the list
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# the... \ list of photos
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#
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# To print all, you could do (or mix-and-match):
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for photo in result.photos:
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for size in photo.sizes:
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print(size.type)
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AttributeError: 'coroutine' object has no attribute 'id'
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========================================================
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You either forgot to:
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.. code-block:: python
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import telethon.sync
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# ^^^^^ import sync
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Or:
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.. code-block:: python
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async def handler(event):
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me = await client.get_me()
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# ^^^^^ note the await
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print(me.username)
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sqlite3.OperationalError: database is locked
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============================================
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An older process is still running and is using the same ``'session'`` file.
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This error occurs when **two or more clients use the same session**,
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that is, when you write the same session name to be used in the client:
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* You have an older process using the same session file.
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* You have two different scripts running (interactive sessions count too).
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* You have two clients in the same script running at the same time.
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The solution is, if you need two clients, use two sessions. If the
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problem persists and you're on Linux, you can use ``fuser my.session``
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to find out the process locking the file. As a last resort, you can
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reboot your system.
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If you really dislike SQLite, use a different session storage. There
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is an entire section covering that at :ref:`sessions`.
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event.chat or event.sender is None
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==================================
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Telegram doesn't always send this information in order to save bandwidth.
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If you need the information, you should fetch it yourself, since the library
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won't do unnecessary work unless you need to:
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.. code-block:: python
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async def handler(event):
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chat = await event.get_chat()
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sender = await event.get_sender()
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What does "bases ChatGetter" mean?
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==================================
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In Python, classes can base others. This is called `inheritance
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<https://ddg.gg/python%20inheritance>`_. What it means is that
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"if a class bases another, you can use the other's methods too".
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For example, `Message <telethon.tl.custom.message.Message>` *bases*
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`ChatGetter <telethon.tl.custom.chatgetter.ChatGetter>`. In turn,
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`ChatGetter <telethon.tl.custom.chatgetter.ChatGetter>` defines
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things like `obj.chat_id <telethon.tl.custom.chatgetter.ChatGetter>`.
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So if you have a message, you can access that too:
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.. code-block:: python
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# ChatGetter has a chat_id property, and Message bases ChatGetter.
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# Thus you can use ChatGetter properties and methods from Message
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print(message.chat_id)
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Telegram has a lot to offer, and inheritance helps the library reduce
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boilerplate, so it's important to know this concept. For newcomers,
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this may be a problem, so we explain what it means here in the FAQ.
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Can I use Flask with the library?
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=================================
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Yes, if you know what you are doing. However, you will probably have a
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lot of headaches to get threads and asyncio to work together. Instead,
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consider using `Quart <https://pgjones.gitlab.io/quart/>`_, an asyncio-based
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alternative to `Flask <flask.pocoo.org/>`_.
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Check out `quart_login.py`_ for an example web-application based on Quart.
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Can I use Anaconda/Spyder/IPython with the library?
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===================================================
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Yes, but these interpreters run the asyncio event loop implicitly,
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which interferes with the ``telethon.sync`` magic module.
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If you use them, you should **not** import ``sync``:
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.. code-block:: python
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# Change any of these...:
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from telethon import TelegramClient, sync, ...
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from telethon.sync import TelegramClient, ...
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# ...with this:
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from telethon import TelegramClient, ...
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You are also more likely to get "sqlite3.OperationalError: database is locked"
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with them. If they cause too much trouble, just write your code in a ``.py``
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file and run that, or use the normal ``python`` interpreter.
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.. _logging: https://docs.python.org/3/library/logging.html
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.. _@SpamBot: https://t.me/SpamBot
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.. _issue 297: https://github.com/LonamiWebs/Telethon/issues/297
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.. _quart_login.py: https://github.com/LonamiWebs/Telethon/tree/master/telethon_examples#quart_loginpy
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