Built-in Modules

https://docs.python.org/3/py-modindex.html

• from keyword: imports parts of a module
  • good rule of thumb: import only what you need!

# Example: random module
import random
import random as rand # aliasing
from random import * # imports everything
 
rand.choice(['apple','banana','kiwi'])
rand.shuffle(['apple','banana','kiwi'])
 
from random import choice, shuffle # remove the word random!
choice(['apple','banana','kiwi'])
shuffle(['apple','banana','kiwi'])
 
from random import choice as c, shuffle as sh # you can do this too

The difference between import random and from random import *

• import random: imports the entire random module
• from random import *: imports all the functions, classes, and variables from the random module directly into your current namespace
  • no need to prefix the functions with random.