Python Modules

Import code from the standard library and your own files.

✍️ 3 exercises + code challenge in this lesson

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A module is a file containing Python code. Python ships with a large standard library of modules.

import math: then use math.sqrt().
from datetime import date: import one name.
import statistics as st: give it a shorter alias.
Your own file helpers.py can be imported with import helpers.
Install third-party packages with pip install package-name.

Key Takeaways: Python Modules

Mastering Python Modules helps you write clean and reliable Python code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

Python Modules Code Example

Python

import math
import statistics as st
from datetime import date
from collections import Counter

print(math.sqrt(144), math.pi)
print("Mean:", st.mean([70, 85, 90]), "Median:", st.median([70, 85, 90]))
print("Today:", date.today())
print(Counter("mississippi").most_common(2))

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Python Modules Practice Exercises

Check what you learned in “Python Modules”.

/ 3 solved

Fill in the blank

Import the math module.

 math

✓ Correct! Not quite. Try again.

Multiple choice

How do you import only sqrt from math?

from math import sqrt import sqrt from math math.import(sqrt) include math.sqrt

✓ Correct! Not quite. Try again.

Code challenge

Import math and print the square root of 81.

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Python Iterators & Generators

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Python Dates

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Python Modules

💡 Key Takeaways: Python Modules

Python Modules Code Example

Python Modules Practice Exercises

Key Takeaways: Python Modules