Internet Relay Chat
There are several Python-related channels on the libera IRC network. All channels are available by connecting to Internet Relay Chat server Libera.Chat.
The #python channel is for all discussion about the Python language, ecosystem, and community. You can get immediate help with programming questions. You will need to first register your nickname with Libera, using the nickname setup instructions (https://libera.chat/guides/registration).
Spanish speakers can use the #pyar channel, from the Python Argentina user group.
French speakers can join the #python-fr channel.
Finnish speakers can join the #python.fi channel on a different network, IRCnet.
(Note: prior to May 2021, these channels existed on Freenode. Some of them were forcibly removed by Freenode operators, after a change in management and network policy. The channels on Freenode are no longer under the PSF umbrella.)
Other Channels
#python-dev is for CPython developers, where they can coordinate their work or discuss problems. Bots post updates to the channel based on activity in the CPython source tree and bug tracker.
#python-infra is for Python infrastructure discussion.
#pydotorg is for discussion of this website, python.org.
#distutils and #pypa are for Python packaging discussion.
Other Sites
IRC clients for many platforms can be found in the Internet Relay Chat (IRC) Help Archive.
As an unofficial alternative to IRC, you can use the Zulip livechat about Python. It works in your browser and you can create a free login to view and post messages. In particular, the #general/help "stream" (or channel) is a place to ask for and give help with general Python usage.