To use or not to use: packaged flask

[Alec Leamas]

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