Errors, files and libraries · Lesson 18 of 25

Modules and the standard library

Import existing tools and organize files.

8 minutes2 games

A module is often a Python file. import math gives access to math.sqrt; from math import sqrt imports one name. The standard library ships with Python; external packages are installed in the project environment.

Python

import math
from collections import Counter

print(math.isqrt(81))
counts = Counter("banana")
print(counts["a"])
print(sorted(counts.items()))

Tool	Use
`math`	Mathematics
`collections.Counter`	Count occurrences
`pathlib`	Filesystem paths
`json`	JSON encoding and decoding

Complete the code

Import math and print a square root.

 math
print(math.(25))

Exercise

Use Counter and print the count of tea.

Expected output: 2

Python

from collections import Counter
orders = ["tea", "coffee", "tea"]

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Python

Errors, files and libraries · Lesson 18 of 25

Modules and the standard library

Import existing tools and organize files.

8 minutes2 games

Python

import math
from collections import Counter

print(math.isqrt(81))
counts = Counter("banana")
print(counts["a"])
print(sorted(counts.items()))

Tool	Use
`math`	Mathematics
`collections.Counter`	Count occurrences
`pathlib`	Filesystem paths
`json`	JSON encoding and decoding

Complete the code

Import math and print a square root.

 math
print(math.(25))

Exercise

Use Counter and print the count of tea.

Expected output: 2

Python

from collections import Counter
orders = ["tea", "coffee", "tea"]

Learn more from

Played 0 of 2 games