the __init__(method for child class inheritance in python defining attributes and methods for the child class overriding methods from the parent class instances as attributes modeling real-world objects exercise - ice cream stand exercise - admin exercise - privileges exercise - battery upgrade importing classes importing single class storing multiple classes in module importing multiple classes from module importing an entire module importing all classes from module importing module into module finding your own workflow exercise - imported restaurant exercise - imported admin exercise - multiple modules the python standard library exercise - ordereddict rewrite exercise - dice exercise - python module of the week styling classes summary files and exceptions reading from file reading an entire file file paths reading line by line making list of lines from file working with file' contents large filesone million digits is your birthday contained in pi exercise - learning python exercise - learning writing to file writing to an empty file writing multiple lines appending to file exercise - guest exercise - guest book exercise - programming poll exceptions handling the zerodivisionerror exception using try-except blocks using exceptions to prevent crashes contents in detail xvii