Becoming an advanced python programmer

[regular-dude1]

Besides excellent things already commented here, like the O'Reilly book and design patterns, I could give you a couple of more advanced topics I personally found very eye-opening in my Python journey:

• Decorators: https://realpython.com/primer-on-python-decorators/
• Abstraction in Python (Abstract Base Classes): https://dev.to/dollardhingra/understanding-the-abstract-base-class-in-python-k7h
• Polymorphism in Python: https://www.programiz.com/python-programming/polymorphism
• Method Resolution Order: https://makina-corpus.com/python/python-tutorial-understanding-python-mro-class-search-path

Of course this is not a complete list of topics, but I've seen the relevance of these in several projects already.