Python Modules

Consider a module to be the same as a code library. A file containing a set of functions you want to include in your application.

To create a module just save the code you want in a file with the file extension.py

Save this code in a file named mymodule.py def greeting(name):

Now we can use the module we just created, by using the import statement:

Import the module named mymodule, and call the greeting function: import mymodule mymodule.greeting("Jonathan")

When using a function from a module, use the syntax: module_name.function_name.

The module can contain functions, as already described, but also variables of all types (arrays, dictionaries, objects etc):

Import the module named mymodule, and access the person1 dictionary:

You can name the module file whatever you like, but it must have the file extension.py

You can create an alias when you import a module, by using the as keyword:

Import and use the platform module:

List all the defined names belonging to the platform module:

The dir() function can be used on all modules, also the ones you create yourself.

You can choose to import only parts from a module, by using the from keyword.

The module named mymodule has one function and one dictionary:

person1

Import only the person1 dictionary from the module:

When importing using the from keyword, do not use the module name when referring to elements in the module.

person1["age"], not mymodule.person1["age"]