Python Modules

Importing modules

Use import to bring in built-in or third-party modules.

import math
print(math.pi)
print(math.sqrt(16))

from ... import

Import specific items from a module.

from math import pi, sqrt
print(pi)
print(sqrt(25))

Aliases

Use as to give a module a shorter name.

import math as m
print(m.pi)

Try it yourself

Run the example below. Edit it and see what changes.

import math
print(round(math.pi, 2))
print(math.factorial(5))
 

Common mistakes

• ⚠Naming your file the same as a module (e.g., math.py) — it shadows the built-in.
• ⚠Importing everything with from x import * can cause name conflicts.