Steps to Reproduce

Run echobot.py on python 3.14

Expected behaviour

It works without any errors

Actual behaviour

The program crashes because there is no event loop.

Operating System

Linux, but this is invariant

Version of Python, python-telegram-bot & dependencies

python-telegram-bot 22.3 (v22.3-0-gc0627124)
Bot API 9.1
Python 3.14.0b4 (main, Jul  8 2025, 21:00:06) [Clang 20.1.4 ]

Relevant log output

/home/harshil/Documents/pyprojects/python-telegram-bot/.venv/lib/python3.14/site-packages/anyio/from_thread.py:119: SyntaxWarning: 'return' in a 'finally' block
  return result
Traceback (most recent call last):
  File "/home/harshil/Documents/pyprojects/python-telegram-bot/examples/echobot.py", line 71, in <module>
    main()
    ~~~~^^
  File "/home/harshil/Documents/pyprojects/python-telegram-bot/examples/echobot.py", line 67, in main
    application.run_polling(allowed_updates=Update.ALL_TYPES)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/harshil/Documents/pyprojects/python-telegram-bot/src/telegram/ext/_application.py", line 839, in run_polling
    return self.__run(
           ~~~~~~~~~~^
        updater_coroutine=self.updater.start_polling(
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<9 lines>...
        close_loop=close_loop,
        ^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/home/harshil/Documents/pyprojects/python-telegram-bot/src/telegram/ext/_application.py", line 1031, in __run
    loop = asyncio.get_event_loop()
  File "/home/harshil/.local/share/uv/python/cpython-3.14.0b4-linux-x86_64-gnu/lib/python3.14/asyncio/events.py", line 718, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'MainThread'.
<sys>:0: RuntimeWarning: coroutine 'Updater.start_polling' was never awaited

Additional Context

I don't know how I missed this before, the tests don't catch this probably because pytest-asyncio creates a new event loop in the background.