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124 lines
3.4 KiB
ReStructuredText
124 lines
3.4 KiB
ReStructuredText
Calling Methods
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===============
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At this point, we have successfully :doc:`installed Pyrogram <../intro/install>` and :doc:`authorized <auth>` our
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account; we are now aiming towards the core of the framework.
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.. contents:: Contents
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:backlinks: none
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:depth: 1
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:local:
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-----
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Basic Usage
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-----------
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Making API method calls with Pyrogram is very simple. Here's a basic example we are going to examine step by step:
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.. code-block:: python
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from pyrogram import Client
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app = Client("my_account")
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async def main():
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async with app:
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await app.send_message("me", "Hi!")
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app.run(main())
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Step-by-step
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^^^^^^^^^^^^
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#. Let's begin by importing the Client class.
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.. code-block:: python
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from pyrogram import Client
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#. Now instantiate a new Client object, "my_account" is a session name of your choice.
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.. code-block:: python
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app = Client("my_account")
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#. Async methods can't be executed at the top level, because they must be inside an async context.
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Here we define an async function and put our code inside. Also notice the ``await`` keyword in front of the method
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call; this is required for all asynchronous methods.
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.. code-block:: python
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async def main():
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async with app:
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await app.send_message("me", "Hi!")
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#. Finally, we tell Python to schedule our ``main()`` async function by using Pyrogram's :meth:`~pyrogram.Client.run`
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method.
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.. code-block:: python
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app.run(main())
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Context Manager
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---------------
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The ``async with`` statement starts a context manager, which is used as a shortcut for starting, executing and stopping
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the Client, asynchronously. It does so by automatically calling :meth:`~pyrogram.Client.start` and
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:meth:`~pyrogram.Client.stop` in a more convenient way which also gracefully stops the client, even in case of
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unhandled exceptions in your code.
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Below there's the same example as above, but without the use of the context manager:
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.. code-block:: python
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from pyrogram import Client
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app = Client("my_account")
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async def main():
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await app.start()
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await app.send_message("me", "Hi!")
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await app.stop()
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app.run(main())
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Using asyncio.run()
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-------------------
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Alternatively to the :meth:`~pyrogram.Client.run` method, you can use Python's ``asyncio.run()`` to execute the main
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function, with one little caveat: the Client instance (and possibly other asyncio resources you are going to use) must
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be instantiated inside the main function.
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.. code-block:: python
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import asyncio
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from pyrogram import Client
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async def main():
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app = Client("my_account")
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async with app:
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await app.send_message("me", "Hi!")
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asyncio.run(main())
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Synchronous Calls
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------------------
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Pyrogram is an asynchronous framework, but it also provides a convenience way for calling methods without the need
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of async/await keywords and the extra boilerplate. In case you want Pyrogram to run synchronously, simply use the
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synchronous context manager:
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.. code-block:: python
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from pyrogram import Client
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app = Client("my_account")
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with app:
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app.send_message("me", "Hi!")
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As you can see, the non-async example becomes less cluttered. Use Pyrogram in this non-asynchronous way only when you
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want to write something without the boilerplate or in case you want to combine Pyrogram with other libraries that are
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not async. |