Question

Write a Python program that does the following. 

• Create a string that is a long series of words separated by spaces. The string is your own creative choice. It can be names, favorite foods, animals, anything. Just make it up yourself. 
• Turn the string into a list of words using split. 
• Delete three words from the list, but delete each one using a different kind of Python operation. 
• Sort the list. 
• Add new words to the list (three or more) using three different kinds of Python operation. 
• Turn the list of words back into a single string using join. 
• Print the string. 

Part 2

Create your own examples using python lists

• Nested lists 
• The “*” operator 
• List slices 
• The “+=” operator 
• A list filter 
• A list operation that is legal but does the "wrong" thing, not what the programmer expects 

Provide the Python code and output for your program and all your examples. 

 

 

Answer 1

Part 1

# Part 1
pizzas = "Cheese Veggie Pepperoni Meat Margherita BBQ Hawaiian Buffalo"
words = pizzas.split()
words.remove("Veggie")
words.pop()
del words[3]
words.sort()
words.append("Works")
words.insert(1, "Supreme")
words.extend(("Pizza",))
string = ' '.join(words)
print(string)

Output:

BBQ Supreme Cheese Hawaiian Meat Pepperoni Works Pizza

Part 2:

# Nested lists
pizza_orders = [["Cheese", "Veggie"], ["Pepperoni", "Meat", "Havaiian"], ["Buffalo"]]
for order in pizza_orders:
    print("Pizzas orederd:", order)
print()

# The "*" operator 
print("Happy hours!")
double_order = ["Margherita"]*2
print("You get:")
print(double_order)
print()

# List slices
first_two = pizza_orders[:2]
print("First two order")
for order in first_two:
    print("Pizzas ordered:", order)
print()

# The "+=" operator
pizza_orders += [double_order]
for order in pizza_orders:
    print("Pizzas ordered:", order)
print()

# The filter
print("We have not Veggie, sorry")
new_orders = filter(lambda x: "Veggie" not in x, pizza_orders)
for order in new_orders:
    print("Pizzas ordered:", order)
print()

# A list operation that is legal but does the "wrong" thing, not what the programmer expects
L = [[1, 1, 1], [2, 2, 2]]
print("Try to add third nested list [3, 3,3]")
L += [3, 3, 3]
print(L)

Output:

Pizzas orederd: ['Cheese', 'Veggie']
Pizzas orederd: ['Pepperoni', 'Meat', 'Havaiian']
Pizzas orederd: ['Buffalo']

Happy hours!
You get:
['Margherita', 'Margherita']

First two order
Pizzas ordered: ['Cheese', 'Veggie']
Pizzas ordered: ['Pepperoni', 'Meat', 'Havaiian']

Pizzas ordered: ['Cheese', 'Veggie']
Pizzas ordered: ['Pepperoni', 'Meat', 'Havaiian']
Pizzas ordered: ['Buffalo']
Pizzas ordered: ['Margherita', 'Margherita']

We have not Veggie, sorry
Pizzas ordered: ['Pepperoni', 'Meat', 'Havaiian']
Pizzas ordered: ['Buffalo']
Pizzas ordered: ['Margherita', 'Margherita']

Try to add third nested list [3, 3,3]
[[1, 1, 1], [2, 2, 2], 3, 3, 3]