What are your opinions on .NET Core vs Python?

[Joseph L. Casale]

> .NET is a library that can be used from many languages, including Python. 

No.

.NET Core (what the OP asked about which is not .NET) is a cross-platform
framework. Obviously Python and .NET differ in runtime semantics with
respect to the original source code, however they are now roughly equivalent
in that both specifications are cross platform.

I personally like .NET Core a great deal and as the framework matures and
it starts to present all of the .NET APIs, it will become a viable choice on non
Windows platforms.

jlc