function_exercise.md

Functions and Namespaces

Exercise 1

Create two new Python files in your working directory:

triangle.py

a = 3
b = 4

and

rectangle.py

a = 4
b = 3

Exercise 2

Import both modules from the command line or a third script and print the value of a. Consider the following variations:

from triangle import a

import triangle

Exercise 3

Add the follow function to triangle.py:

import math

def calc_hypothenuse(a, b):
    c = math.sqrt(a ** 2 + b ** 2)
    return c

Import and call the function in your main module:

c = calc_hypothenuse(4, 5)
return c

Exercise 4

Write a function calc_area(a, b) in rectangle.py.

Exercise 5

Consider the following variations of the function definition:

def calc_hypothenuse(a=3, b=4):
    ...

def calc_hypothenuse(a, b=4):
    ...

def calc_hypothenuse(a=3, b):
    ...

...
    return a, b, c

def calc_hypothenuse():
    ...

Exercise 6

Discuss the concepts of variable scope and namespaces