Python Summary - Modules

main.py

…

Expected output

Lesson notes

Summary - Modules

Combine import, from and the standard library to write a random number game.

Summary - Modules

In this group you learned five core concepts:

import — loads a module, accessed with a dot
from import — takes a specific item
as — gives a module a short name
__name__ == '__main__' — direct execution condition
Standard library — math, random, datetime, statistics

Now you will do two short tasks that combine them: one with import and from import together, one with a __name__ block and a function.

Exercise import and from import together

Write import math. Then write from math import pi. Then write print(math.sqrt(16), pi).

Show example solution

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

Exercise Function with name block

Define def topla(a, b): with return a + b in the body. Then inside an if __name__ == '__main__': block write print(topla(2, 3)).

Show example solution

def topla(a, b):
    return a + b

if __name__ == '__main__':
    print(topla(2, 3))

Test yourself

Which statement is wrong?
- import math as m keeps the math name
- from math import sqrt takes only sqrt
- import math loads the math module
- from math import * is dangerous
Show answer

import math as m keeps the math name — import math as m replaces the math name with m; math is no longer available.
Match module concepts

import

Loads a module
from import

Takes an item
as

Gives an alias
__name__

Direct execution condition

Next lesson: Project design