Most of it has content from stackoverflow question.

• Modules :
  • These are simple python files with the .py extension, which implement a set of functions/functionality.
  • Modules are imported from other modules using the import command like import file
  • Above will import variables/funtions/classes from file.py.
• Packages :
  • Package is a directory of Python modules containing an additional init.py file.
  • For python package or module are of same type

        >>> import some_module
        >>> type(some_module)
        <type 'module'>
        >>> import some_package
        >>> type(some_package)
        <type 'module'>
    

  • When we import module we get all it’s function, classes and variable defined in it.
  • When we import package only variables/functions/classes in the init.py file of that package are directly visible, not sub-packages or modules.
  • The directory to be identified as package by python, should have init.py file in that directory
  • Packages can have sub-packages, those directories should have init.py file in the sub-directory.