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89 lines
2.7 KiB
ReStructuredText
89 lines
2.7 KiB
ReStructuredText
======================
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String-based Debugging
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======================
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Debugging is *really* important. Telegram's API is really big and there
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are a lot of things that you should know. Such as, what attributes or fields
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does a result have? Well, the easiest thing to do is printing it:
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.. code-block:: python
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entity = await client.get_entity('username')
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print(entity)
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That will show a huge **string** similar to the following:
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.. code-block:: python
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Channel(id=1066197625, title='Telegram Usernames', photo=ChatPhotoEmpty(), date=datetime.datetime(2016, 12, 16, 15, 15, 43, tzinfo=datetime.timezone.utc), version=0, creator=False, left=True, broadcast=True, verified=True, megagroup=False, restricted=False, signatures=False, min=False, scam=False, has_link=False, has_geo=False, slowmode_enabled=False, access_hash=-6309373984955162244, username='username', restriction_reason=[], admin_rights=None, banned_rights=None, default_banned_rights=None, participants_count=None)
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That's a lot of text. But as you can see, all the properties are there.
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So if you want the title you **don't use regex** or anything like
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splitting ``str(entity)`` to get what you want. You just access the
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attribute you need:
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.. code-block:: python
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title = entity.title
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Can we get better than the shown string, though? Yes!
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.. code-block:: python
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print(entity.stringify())
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Will show a much better representation:
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.. code-block:: python
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Channel(
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id=1066197625,
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title='Telegram Usernames',
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photo=ChatPhotoEmpty(
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),
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date=datetime.datetime(2016, 12, 16, 15, 15, 43, tzinfo=datetime.timezone.utc),
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version=0,
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creator=False,
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left=True,
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broadcast=True,
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verified=True,
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megagroup=False,
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restricted=False,
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signatures=False,
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min=False,
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scam=False,
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has_link=False,
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has_geo=False,
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slowmode_enabled=False,
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access_hash=-6309373984955162244,
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username='username',
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restriction_reason=[
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],
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admin_rights=None,
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banned_rights=None,
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default_banned_rights=None,
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participants_count=None
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)
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Now it's easy to see how we could get, for example,
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the ``year`` value. It's inside ``date``:
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.. code-block:: python
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channel_year = entity.date.year
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You don't need to print everything to see what all the possible values
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can be. You can just search in http://tl.telethon.dev/.
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Remember that you can use Python's `isinstance
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<https://docs.python.org/3/library/functions.html#isinstance>`_
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to check the type of something. For example:
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.. code-block:: python
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from telethon import types
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if isinstance(entity.photo, types.ChatPhotoEmpty):
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print('Channel has no photo')
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