It's definitely a selling point for Python programmers, because it's so easy to use with your Python projects. You just set the package requirement and you're done, it will work in the same environment wherever your app works, upgrades are a piece of cake, no need to worry about platform support, permissions, etc.
f.ex. Whoosh (full-text search) gained a lot of traction in the Python world not because it was the fastest at the time nor the most full-featured (compared to the more mature Java-based ones), but because of convenience. Such solutions, even when they're not the most advanced player in the league, are great for starting up fast and pushing features out the door.
On a side note, it's a pleasure for me to see it's from Poland. Will test it out on a feature project in the next few days.