Python Docs

Python Importing Modules — Full Cheat Sheet

After creating a Python module, you can include it in another program using the import statement.

import mymodule

mymodule.greeting("Jonathan")

Always call functions using:
module_name.function_name

The as keyword lets you rename a module at import time. Helpful when module names are long.

import mymodule as mx

a = mx.person1["age"]
print(a)

Using the from keyword, you can import only what you need.

from mymodule import person1

print(person1["age"])

After importing specific items, you can use them directly without writing the module name.

Python includes many useful built-in modules such as platform, math, random, os, etc.

import platform

x = platform.system()
print(x)

The dir() function lists all functions, classes, and variables inside a module.

import platform

x = dir(platform)
print(x)

You can use dir() on any module — built-in or user-defined.