Most of new users in this forum do not notice that the markdown formatting will prevent their code to show properly. Other users willing to help them need to ask the new user to use the preformatted text marks. This brings a lot of noise, confusion and bad experience to the forum. See for example the confusion here:
I noticed that there is an official module for this problem. It tries to detect a code in a message about to be posted and shows a warning if it is not marked as preformatted text:
Can we have this installed here, please?
Unfortunately I have no idea how well it detects Python.
PS: Another useful function would be some reply templates but I will investigate this later.