Comment # 5 on bug 1159706 from Philipp Seiler

Have you tried installing "python2-qt4" from the main repository
"openSUSE-Leap-15.1-Oss"

It provides the missing dependency to install/downgrade puddletag.

```
$ rpm -q --whatprovides python-qt4

python2-qt4-4.12.1-lp151.3.5.x86_64
```


You can search for different versions of a package with zypper easily
```
zypper search -s puddletag
```

Then search for the correct one (something like openSUSE 15.1 OSS)
And install it with zypper from the repository.
```
zypper install --from "openSUSE-Leap-15.1-Oss" puddletag
```

This automatically changes the vendor, so you don't need to download rpms
manually and stuff.

But I suggest you to switch the tag editor as it won't be included in the next
leap release and tumbleweed anymore. 

I think this can be resolved.