Modules & Imports (import, from, as, custom modules, name) - Python Tutorial #17

Learn Python modules and imports in this beginner-friendly tutorial! 📦

In this lesson, you will learn:
✅ import to load entire modules (math, os, platform)
✅ from...import to pick specific functions
✅ import...as to create shorter aliases
✅ Exploring modules with dir()
✅ Creating custom modules (helpers.py)
✅ Three import styles: import, from, and as
✅ Module-level constants (PI)
✅ The __name__ == "__main__" guard
✅ Multi-file projects with imports
✅ Mini Project: Unit Converter

🕐 Timestamps:
0:00 - Introduction
0:22 - Import Basics Explained
0:46 - Import Basics Demo
3:15 - Custom Modules Explained
3:39 - Custom Modules Demo
6:31 - Unit Converter Explained
6:55 - Unit Converter Demo
9:48 - Recap
10:23 - End

💻 Source Code: https://github.com/GoCelesteAI/python_modules_imports

📚 Code from this lesson:

# Import entire module
import math
print(math.sqrt(144))

# Import specific functions
from random import randint, choice
print(randint(1, 10))

# Import with alias
import datetime as dt
now = dt.datetime.now()

# Custom module (helpers.py)
def greet(name):
return f"Hello, {name}!"

# Using custom module
from helpers import greet
print(greet("Alice"))

# __name__ guard
if __name__ == "__main__":
print("Running directly")

🔗 Previous: Lesson 16 - Exception Handling
🔗 Next: Lesson 18 - Classes & Objects

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