The official docs should never be overlooked, as there’s an enormous amount to learn from The Tutorial (https://docs.python.org/3/tutorial/index.html#tutorial-i

The official docs should never be overlooked, as there’s an enormous amount to learn from The Tutorial (https://docs.python.org/3/tutorial/index.html#tutorial-index https://docs.python.org/3/tutorial/index.html#tutorial-index), the Standard Library (https://docs.python.org/3/library/index.html#library-index https://docs.python.org/3/library/index.html#library-index) and the Reference Manual (https://docs.python.org/3/reference/index.html https://docs.python.org/3/reference/index.html). All three are quite well written, kept more reliably up to date than any other resource, and provide links to a wealth of other material. A particularly useful point is the link to the source code found at the top of most of the Standard Library pages… Python’s source code is really literate, and often the best way of understanding what’s happening “under the hood” is to actually look, rather than rely on someone else’s summary or intuition of what maybe only _was_ under the hood.