I have been using Java for the past 25 years, more or less (yes, I am Old...). Watched the J2EE madness...and the micro service reinassance, In the middle I have been grown used to the rich Java ecosystem (Spring, Maven, Hibernate, and so on). How to migrate to Python? Which components of the ecosystem should we choose?
I continue to use Java for enterprise-grade systems. It combines performance, security and a rich set of support libraries, along with (in many cases) the ability to plug-replace support systems. For example, once in a rush I switched from Apache OpenJPA to Hibernate JPA in an afternoon when I needed a feature not yet supported in the Apache version.
So I don't really have Python on a "migration path" myself (and would probably migrate the other way if I needed migration). For the most part, I simply gave up using Java for stuff that just needed to be hacked out. However, if you want something more ambitious, check out Django. It's a complete ORM-based web framework for Python.
Some people, when well-known sources tell them that fire will burn them, don't put their hands in the fire.
Some people, being skeptical, will put their hands in the fire, get burned, and learn not to put their hands in the fire.
And some people, believing that they know better than well-known sources, will claim it's a lie, put their hands in the fire, and continue to scream it's a lie even as their hands burn down to charred stumps.