Python language as any language software needs to be a programming and analysis systems and no different from any language in programming except the difference of instructions and can review any Python book for the purpose of learning on the format and instructions.
For the basics of Python 3, I recommend SoloLearn. It is free, interactive, and available for both computers and mobile devices. Moreover, it lets you test out of material you already know, and issues a certificate of completion which you can conveniently upload to your LinkedIn profile directly from the SoloLearn website/application.
https://www.sololearn.com/
For third-party packages or the more advanced portions of the standard library, the learning resources you will need will depend fairly heavily on what you are attempting to do. However, if you have any questions related to that down the line, I am happy to address them.