A python module is nothing but a package to encapsulate reusable code. Modules usually, but not always, reside in a folder with a
__init__.py file inside of it. Modules can contain functions but also classes. Modules are imported using the
Python has a way to put definitions in a file and use them in a script
or in an interactive instance of the interpreter. Such a file is
called a module; definitions from a module can be imported into other
modules or into the main module.
Learn more about Python modules at these links:
https://docs.python.org/2/tutorial/modules.html (Python 2)
https://docs.python.org/3/tutorial/modules.html (Python 3)
Classes, in the other hand, can be defined in your main application code or inside modules imported by your application. Classes are the code of Object Oriented Programming and can contain properties and methods.
Learn more about Python classes at these links:
https://docs.python.org/2/tutorial/classes.html (Python 2)
https://docs.python.org/3/tutorial/classes.html (Python 3)