Modules in python

Let's discuss what a module is and its uses

Modules refer to a file containing python statement and definition.

We use modules to break down large programs into small manageable and organised files. Furthermore modules provide reusability of code.

We can define our most used function in a module and import it. Instead of copying their definition into different programs.

How to create a module and import them

 

To create a module write a python code in a file and save it with .py file extension. Let try some examples

 

def max_of_two( x, y ):

    of x > y:

        return x

    return y

def max_of_three( x, y, z ):

    return max_of_two( x, max_of_two( y, z ) )

print(max_of_three(3, 6, -5))

Importing module

To use this module, we need to import it let's create a new file main.py

 And import it .

Import example

Once we import the example module we can call the max_of _three() function

                         Code

Import example

Output = example.max_of_three(3,21)

To call a function defined in the module we use the dot operator .

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