Comment 4 for bug 1801109

@Maciej:

Python 2.7.15 (default, Jun 27 2018, 13:05:28)
[GCC 8.1.1 20180531] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx;print(wx.version())
4.0.0b1 gtk2 (phoenix)

Python 3.7.1 (default, Oct 22 2018, 10:41:28)
[GCC 8.2.1 20180831] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx;print(wx.version())
4.0.3 gtk3 (phoenix) wxWidgets 3.0.4

Arch Linux stable, Python package versions:
python 3.7.1-1
python2 2.7.15-2

python-wxpython 4.0.3-4
wxgtk-common 3.0.4-2
wxgtk2 3.0.4-2
wxgtk3 3.0.4-2
wxpython-gtk2 3.0.2.0-7

The last posted patch works for me, it allows successful building for Python 3.