python3-idle from home:ae40515:branches:SUSE:SLE-15-SP3:Update project
Select Your Operating System
Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ae40515:branches:SUSE:SLE-15-SP3:Update/15.6/home:ae40515:branches:SUSE:SLE-15-SP3:Update.repo zypper refresh zypper install python3-idle