Modules and Imports

What You’ll Learn

You’ll learn how to use code from other files and utilize Python’s extensive standard library.

What is a Module?

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.

If you have a file mymodule.py:

# mymodule.py
def greeting(name):
    print("Hello, " + name)

You can use it in another file with the import statement:

import mymodule

mymodule.greeting("Jonathan")

Importing Specific Parts

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

from mymodule import greeting

greeting("Jonathan") # No need for mymodule. prefix

Built-in Modules

Python comes with a huge standard library.

import math
print(math.pi) # 3.141592653589793

import random
print(random.randint(1, 10)) # Random number between 1 and 10