3 binary packages have unsatisfiable dependencies normal
The dependencies of hplip-gui=3.18.10+dfsg0-3 cannot be satisfied on amd64 because: unsatisfied dependency on python3 (< 3.7)
The dependencies of hplip=3.18.10+dfsg0-3 cannot be satisfied on mips, armel, mipsel, amd64, mips64el, i386, arm64, s390x, armhf, and ppc64el because: unsatisfied dependency on python3 (< 3.7)
The dependencies of printer-driver-postscript-hp=3.18.10+dfsg0-3 cannot be satisfied on mips, armel, mipsel, amd64, mips64el, i386, arm64, s390x, armhf, and ppc64el because: unsatisfied dependency on python3 (< 3.7)