Activity — Functions

Purpose:

1. Practice problem solving
2. Practice writing and using functions
3. Understand named arguments
4. Understand optional arguments
5. Understand the difference between print and return
6. Understand the concept of local and global variables
7. Practice using expressions
8. Understand data type and casting
9. Practice formatting output and working with multiple/nested quotations

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For this activity, you may work alone or with one partner. Do the following problems and write function(s) to solve the problems. Be sure to include docstrings describing what the function does.

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Problem #1

Write a file (named awesomeshirtshop.py) with two functions: custom_shirt and get_total_order.

• custom_shirt accepts a shirt size (S, M, or L), the text of a message that should be printed on the shirt (let a default text be I'll get A+), and the location where the text should be printed (front or back, let a default location be front). The function custom_shirt should print a sentence summarizing the size of the shirt, the message printed on it, and the location.
• get_total_order returns the total number of shirts ordered.

Note:
For simplicity, let's not worry about the length of the text.
For challenge, you may decide the maximum length of message and decide how to enforce the constraint.

Example invocations:

When you run awesomeshirtshop.py, nothing should happen. It defines functions, it does not run the function.

If in another file (let's call it driver1.py) you write the following:
(assume that the names of function parameters are size, msg, and location)

      
   import awesomeshirtshop

   awesomeshirtshop.custom_shirt("M", "I'm awesome", "back")
   awesomeshirtshop.custom_shirt("M", "I'm awesome")
   awesomeshirtshop.custom_shirt("M")
   awesomeshirtshop.custom_shirt(size="M", msg="I'm awesome", location="back")
   awesomeshirtshop.custom_shirt(size="M", msg="I'm awesome")
   awesomeshirtshop.custom_shirt(size="M")
   awesomeshirtshop.custom_shirt(msg="I'm awesome", size="M", location="back")
   awesomeshirtshop.custom_shirt(msg="I'm awesome", size="M")
   awesomeshirtshop.custom_shirt(size="M", location="back")

   print(awesomeshirtshop.get_total_order())

you should get the following output:

   Custom shirt size "M" with text "I'm awesome" printed on "back"
   Custom shirt size "M" with text "I'm awesome" printed on "front"
   Custom shirt size "M" with text "I'll get A+" printed on "front"
   Custom shirt size "M" with text "I'm awesome" printed on "back"
   Custom shirt size "M" with text "I'm awesome" printed on "front"
   Custom shirt size "M" with text "I'll get A+" printed on "front"
   Custom shirt size "M" with text "I'm awesome" printed on "back"
   Custom shirt size "M" with text "I'm awesome" printed on "front"
   Custom shirt size "M" with text "I'll get A+" printed on "back"
   total order: 9 shirts

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Problem #2

Write a file (named awesomepizzashop.py) with two functions: make_pizza and get_total_order.

• make_pizza accepts a pizza size (12 inches, 16 inches, 20 inches), and three toppings (let the default toppings be cheese). The function make_pizza should print a sentence summarizing the size of the pizza and the toppings.
• get_total_order returns the total number of pizza ordered.

Note:
For simplicity, let's assume the toppings are spreaded evenly over the entire pizza.
For challenge, you may decide to allow half or full (or even light, regular, or extra amount of toppings) and decide how to enforce the constraint.

Example invocations:

When you run awesomepizzashop.py, nothing should happen. It defines functions, it does not run the function.

If in another file (let's call it driver2.py) you write the following:
(assume that the names of function parameters are size, top1, top2, and top3)

      
   import awesomepizzashop

   awesomepizzashop.make_pizza(12, "pepperoni", "mushroom", "pineapple")
   awesomepizzashop.make_pizza(16, "pepperoni", "mushroom")
   awesomepizzashop.make_pizza(20, "pepperoni")
   awesomepizzashop.make_pizza(20, top2="pepperoni")
   awesomepizzashop.make_pizza(size=12, top1="pepperoni", top2="mushroom", top3="pineapple")
   awesomepizzashop.make_pizza(size=16, top3="pepperoni", top1="mushroom", top2="pineapple")
   awesomepizzashop.make_pizza(20, top3="pepperoni", top1="mushroom")
   awesomepizzashop.make_pizza(16)

   print(awesomepizzashop.get_total_order())

you should get the following output:

   You order 12 inches pizza with pepperoni, mushroom, and pineapple
   You order 16 inches pizza with pepperoni, mushroom, and cheese
   You order 20 inches pizza with pepperoni, cheese, and cheese
   You order 20 inches pizza with cheese, pepperoni, and cheese
   You order 12 inches pizza with pepperoni, mushroom, and pineapple
   You order 16 inches pizza with mushroom, pineapple, and pepperoni
   You order 20 inches pizza with mushroom, cheese, and pepperoni
   You order 16 inches pizza with cheese, cheese, and cheese
   total order: 8 pizza