ERROR: wxGUI requires wxPython

Q: I'm trying to start the graphical user interface but it tells me

ERROR: wxGUI requires wxPython. No module named 'wx'

A: The solution depends on the operating system in use. In general, the package "python3-wxPython" (naming may vary) is needed.

Things to verify:

• do you use Anaconda? Please check if you have colliding Python versions. If not, read on below.

Linux specific notes:

• Archlinux:
  • python-wxpython

• Centos:
  • sudo dnf install python-wxpython4 (or via software manager)

• Debian:
  • the "grass-gui" package depends (automatically) on "python-wxgtk3.0"

• Fedora:
  • sudo dnf install python3-wxpython4 (or via software manager)

• openSuSe:
  • python3-wxPython needed, see discussion in https://forums.opensuse.org/showthread.php/542338-grass-7-8-from-the-science-package (and elsewhere - TODO: any better solution?)

• Slackware:
  • please add

• Ubuntu:
  • sudo apt-get install python3-wxgtk4.0 (or via software manager)

Mac:

• In case you are using MacPorts, install GRASS with sudo port install grass +gui. It is also possible to add only wxPython with e.g.sudo port install py311-wxpython-4.0, but you have to make sure you use the same Python version (in the example Python 3.11) as the GRASS installation.

Windows:

• .. error should not happen since wxPython is included in the GRASS GIS Windows installer.

Conda related notes (note that many user actually do not use conda):

• Here a suggested solution with a virtual environment: https://stackoverflow.com/a/58902163/452464