Modules are pieces of code that other people have written to fulfill common tasks, such as generating random numbers, performing mathematical operations, etc.
The basic way to use a module is to add import module_name at the top of your code, and then using module_name.var to access functions and values with the name var in the module.
For example the following example uses the random module to generate random numbers.
There is another kind of import that can be used if you only need certain functions from a module. These take the form module_name import var, and then var can be used as if it were defined normally in your code.
For example to import only the pi constant from the math module:
Trying to import a module that isn’t available causes an ImportError.
You can import a module or object under a different name using the as keyword. This is mainly used when a module or object has a long or confusing name.
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