What you need, in my opinion, is python docs and not a book. Python official docs has a tutorial[0] and and a library reference[1] section. The tutorial gives you a clear introduction to language syntax and general coding style and ends with a brief overview to standard library. After that you can keep the library reference "under your pillow" and refer to it as you need.

I found this the best way to start with python. YMMV.

[0] https://docs.python.org/3/tutorial/index.html [1] https://docs.python.org/3/library/index.html