lab.md

Lab 4.02 - Getting Loopy

Part 1

Write a function pluralize_words that takes in a list of words and updates the values of the list to make each one plural. It returns nothing.

Making plurals in English has a number of special cases, but for this lab we'll use a simple rule: if the word ends in a y remove the y and add ies; otherwise add an 's'.

We'll exercise the function on a list of words.

1. Create the function contract for pluralize_words.

2. Provide a few examples that confirm pluralize_words works as expected:

   • Include examples with 'berry'
   • What if the list is empty?

Example 1

    # contract goes here
    def pluralize_words(word_list):
        # your code goes here

    word_list = ['apple', 'berry', 'melon']
    print("Singular words: " + str(word_list))
    pluralize_words(word_list)
    print("No longer singular words: " + str(word_list))
    # more examples go here

Here is what it should look like when you run your code

Singular words: ['apple', 'berry', 'melon']
No longer singular words: ['apples', 'berries', 'melons']

Hint

Remember that you can index into the string and get the length of a string. Use that to get the last letter of each word.

Part 2

Create a function my_reverse, which will return a reversed string.

1. Create the function contract for my_reverse.

2. Provide a few examples to confirm that my_reverse works:

   • An empty string
   • A string of even length
   • A string of odd length greater than 1
   • A string of length 1

Example 2

    # contract goes here
    def my_reverse(string_to_reverse):
        # your code goes here

    reversed = my_reverse("apples")
    print(reversed)
    # examples go here

Here is what example 2 should look like when you run your code

    >>> python3 my_reverse_lab.py
    selppa

Hint 2

To get the last element:(len(my_list) -1) - 0 To get the second to last element: (len(my_list)-1 ) - 1 To get the third to last element: (len(my_list)-1) - 2

Bonus

Create a function reverse_strings_in_list. This function will input a list of strings you want to reverse. The function will reverse the strings in the list by calling the my_reverse function in a loop.