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There is one book about the CPython internals: https://realpython.com/products/cpython-internals-book/.

You can also explore the CPython dev guides: https://devguide.python.org/internals/.

On the one hand, it's great to know what's happening (deep) under the hood and this probably makes for very interesting reading.

On the other hand, if you want to be a productive Python programmer, don't feel like you need to know anything about C++ to do so. there may eventually come a time where it becomes relevant for you, but you can get very far before it comes up.

great stuff, thanks so much! ! I've been looking for python internals resources.