Learn Python 3 The Hard Way . pdf epub azw3 https://learnpythonthehardway.org/python3/ 原始文件是azw3版本，pdf和epub版本是从azw3版本转换生成。 Learn Python 3 the Hard Way now uses Python 3.6. I’ve standardized on this version of Python because it has a new, improved string formatting system that is easier to use than