Package: python3-wxgtk4.0 Version: 4.0.1+dfsg-5 Followup-For: Bug #903595 Scott Talbert provided a workaround which I confirmed fixes the immediate problem:
apt-get install python3-sip/unstable Karsten -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (990, 'testing'), (500, 'stable-updates'), (500, 'unstable'), (500, 'stable'), (1, 'experimental') Architecture: i386 (i686) Kernel: Linux 4.17.0-1-686-pae (SMP w/2 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages python3-wxgtk4.0 depends on: ii libc6 2.27-3 ii libgcc1 1:8.1.0-9 ii libpython3.6 3.6.6-1 ii libpython3.7 3.7.0-1 ii libstdc++6 8.1.0-9 ii libwxbase3.0-0v5 3.0.4+dfsg-4 ii libwxgtk3.0-gtk3-0v5 3.0.4+dfsg-4 ii python3 3.6.5-3 ii python3-sip 4.19.12+dfsg-1 ii python3-six 1.11.0-2 python3-wxgtk4.0 recommends no packages. Versions of packages python3-wxgtk4.0 suggests: pn wx3.0-doc <none> -- no debconf information