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So this is yet another post about how terrible is the python ecosystem with the versions.

The author of the post seems unfamiliar with the meaning of a major release.

maxcountryman (author of flask-login) doesn't know how to pin down versions.

I'm not a big fan of Flask to be honest but this doesn't seem a problem from them. I'd rather blame maxcountryman , the author of the post or pip for this case

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Flask is a minimal web framework that relies on its ecosystem of packages and tutorials to keep it current and relevant. So yes, this is a problem for Flask if key packages that are recommended in just about all tutorials do not keep up to date.

Technically wrong. Parallels only develops Flask and they want to keep Flask as minimal as possible, they don't even want to move away from the legacy optparse for Click, so this kind of "minimal work".

Key packages are developed by the community so lack of understanding or no cooperation with Parallels it's not really a Flask issue.

Unfortunately the only solutions for this are:

* Join Parallels and try to change things.

* Use different package, there's plenty web frameworks.

* Understand better semver, and python should try to promote this, or move away from semver to calendar releases like Ubuntu/Jetbrains

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