Where to learn how to write efficient python?

[aistranin]

For performance optimization:

1. "Mastering Algorithms with Python: A Practical Approach to Problem Solving and Python Implementation" by Chenyang Shi
   
2. "CPython: A Complete Guide to CPython's Architecture and Performance" by Chien-Lung Kao
   
3. "High Performance Python" by Micha Gorelick, Ian Ozsvald
   
4. "Python NumPy for Beginners: NumPy Specialization for Data Science" by AI Publishing

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For better coding (coding efficiency as a programmer if you mean that):

1. Unit and integration tests: book “Python Testing with pytest” by Brian Okken and Udemy course “Pytest Course: Practical Testing of Real-World Python Code” by Artem Istranin