Telethon

https://docs.telethon.dev
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Telethon is a Python library designed to simplify interaction with the Telegram messaging...
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### Install Telethon using pip

Source: https://docs.telethon.dev/Lonami/Telethon

This command installs the Telethon library using pip, the Python package installer. Ensure you have Python 3 and pip installed on your system.

```bash
pip3 install telethon
```

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### Create and Start a Telethon Client

Source: https://docs.telethon.dev/Lonami/Telethon

This Python code demonstrates how to create an instance of the Telethon TelegramClient. You need to replace placeholder api_id and api_hash with your actual credentials obtained from my.telegram.org. The client is then started, establishing a connection to Telegram.

```python
from telethon import TelegramClient, events, sync

# These example values won't work. You must get your own api_id and
# api_hash from https://my.telegram.org, under API Development.
api_id = 12345
api_hash = '0123456789abcdef0123456789abcdef'

client = TelegramClient('session_name', api_id, api_hash)
client.start()
```

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### Basic Telethon Client Operations

Source: https://docs.telethon.dev/Lonami/Telethon

This Python snippet showcases fundamental Telethon operations after a client has been created and started. It includes fetching user information, sending messages and files, downloading media, retrieving messages, and setting up an event handler for new messages.

```python
print(client.get_me().stringify())

client.send_message('username', 'Hello! Talking to you from Telethon')
client.send_file('username', '/home/myself/Pictures/holidays.jpg')

client.download_profile_photo('me')
messages = client.get_messages('username')
messages[0].download_media()

@client.on(events.NewMessage(pattern='(?i)hi|hello'))
async def handler(event):
    await event.respond('Hey!')
```

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### Basic Telethon Client Interaction and Event Handling (Python)

Source: https://docs.telethon.dev/en/v2

This snippet demonstrates how to initialize a Telethon client, log in interactively, send a message to yourself, and set up an event handler for new messages containing 'hello'. It requires the 'telethon' library and asyncio.

```python
import asyncio
from telethon import Client, events
from telethon.events import filters

async def main():
    async with Client('name', api_id, api_hash) as client:
        me = await client.interactive_login()
        await client.send_message(me, f'Hello, {me.name}!')

        @client.on(events.NewMessage, filters.Text(r'(?i)hello'))
        async def handler(event):
            await event.reply('Hey!')

        await client.run_until_disconnected()

asyncio.run(main())
```

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### Interact with Telegram using Telethon

Source: https://docs.telethon.dev/en/stable

This Python code snippet demonstrates basic interaction with the Telegram API using the Telethon library. It shows how to initialize a client, send a message, download a profile photo, set up a message handler for new messages, and run the client until disconnected. Dependencies include the 'telethon' library, 'api_id', and 'api_hash'.

```python
from telethon.sync import TelegramClient, events

with TelegramClient('name', api_id, api_hash) as client:
   client.send_message('me', 'Hello, myself!')
   print(client.download_profile_photo('me'))

   @client.on(events.NewMessage(pattern='(?i).*Hello'))
   async def handler(event):
      await event.reply('Hey!')

   client.run_until_disconnected()
```
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