Install wxPython on Linux Mint 20.2

To install wxPython on Linux Mint 20.2, for Python 3, enter the command in Terminal:

pip3 install -U \
    -f https://extras.wxpython.org/wxPython4/extras/linux/gtk3/ubuntu-20.04 \
    wxPython

Tested on Linux Mint 20.2 xfce, run on VirtualBox 6.1.

ref:

~ https://wxpython.org/pages/downloads/index.html