python39-boost-histogram from devel:languages:python:backports project
Select Your Operating System
Add repository and install manually
For 15.4 py39 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:backports/15.4_py39/devel:languages:python:backports.repo zypper refresh zypper install python39-boost-histogram