If you need the python header files, depending on your distro, you may need to install python3-dev, python3-devel, python3, or some other variation on the name. For a novice, this might not always be obvious and they might not know things like apt-file are helpful for figuring it out.
True. It's the dependencies of dependencies where the tricky part starts.
Dependencies almost always are present in distro repos. What's tricky?
If you need the python header files, depending on your distro, you may need to install python3-dev, python3-devel, python3, or some other variation on the name. For a novice, this might not always be obvious and they might not know things like
apt-fileare helpful for figuring it out.