To use or not to use: packaged flask

Hi out there! I'm dipping my toes in flask, completely newbie. Doing so, I see a lot of fedora flask packages, but no-one anywhere recommends using these - it's all about pypi. I "think" I prefer the packaged version, partly because I'm using another package with native code (which, as I understand it, isn't that easy to make a linux pypi package of). However, I'm stuck at the very beginning: $ ./run_flask ... ImportError: No module named 'flask.cli' So, my question: is it possible to run a flask application using the packaged components similar to run_flask above, in any way? If so, how? Cheers! --alec