Lab 4f — Random and Coiteration

Guess a number

5 minutes

We have given you code in guess_a_number.py that mostly implements a guessing game:

• the computer picks a number between 1 and 100
• you enter a guess until you get it right
• the computer tells you if you have it right, need to go higher, or need to go lower

The code looks like this:

# Be sure to import random


def pick_number() -> int:
    """
    Returns a random number between 1 and 100
    """
    # Write code here
    pass


def guess(number: int):
    while True:
        your_number = int(input("Guess: "))
        # Write code here
        # "You got it!" if correct
        # "Lower" if too high
        # "Higher if too low


def play_game():
    print("Welcome! I picked a number between 1 and 100. Can you guess it?")
    number = pick_number()
    guess(number)


if __name__ == '__main__':
    play_game()

You need to:

• import random

• Write code for pick_number()

• Write the rest of the code for guess()

Discuss with the TA:

• Show a solution.
• Is there anything you don’t understand about random functions?
• Make sure everyone understands every line of code we supplied.

Rock, paper, scissors

5 minutes

We have written a game of rock, paper, scissors in rock_paper_scissors.py. To complete the code, you need to write the get_computer_choice() function, which gets the computer’s random choice when it is their turn.

Discuss with the TA:

• Show a solution.
• Is there anything you don’t understand about random functions?
• Make sure everyone understands every line of code we supplied.

Add numbers

10 minutes

We have given you some code in add_numbers.py that mostly adds two lists of numbers together:

def add_numbers(list1: list[int], list2: list[int]) -> list[int]:
    """
    Takes two lists of numbers.
    Returns a new list that adds each corresponding item together from
    list1 and list 2.
    """
    # Write code here
    pass



def enter_list() -> list[int]:
    numbers = []
    print("Enter a list of numbers!")
    while True:
        number = input("Number: ")
        if number == '':
            break
        numbers.append(int(number))

    return numbers


def main():
    list1 = enter_list()
    list2 = enter_list()
    results = add_numbers(list1, list2)
    print(results)


if __name__ == '__main__':
    main()

You need to write the add_numbers() function. When you run the code, it should print something like this:

Enter a list of numbers!
Number: 1
Number: 2
Number: 3
Number:
Enter a list of numbers!
Number: 4
Number: 5
Number: 6
Number: 7
Number:
[5, 7, 9]

Discuss with the TA:

• How did you implement this function? Show a solution and discuss.
• What happens if one list is longer than the other? Why?
• Is there anything you don’t understand about zip?
• Make sure everyone understands every line of code we supplied.

Repeat

15 minutes

We have given you some code in repeat.py that is supposed to do the following:

• gets a person to input a word or phrase
• creates a list of random numbers from 1 to 10, with one number per character in the word/phrase
• prints a new word/phrase with every character repeated a random number of times

For example, if we run the program, we could see this input and output:

Enter a word: as you wish
aaaaaaaaasssssss   yyoou    wwwwwwwiishhhhh

To complete this code, you need to write two functions:

• get_repeats(word) — Takes a word and returns a list of random numbers. There is one random number for each character in the word. For example, get_repeats('wow') might return [2, 4, 3].

• do_repeats(word, repeats) — Takes a word and a list of numbers and returns a new word that repeats each character in the word based on its corresponding number in the list. For example, do_repeats(‘wow’, [2, 4, 3]) will return ‘wwoooowww’.

Discuss with the TA:

• How did you implement these functions? Show a solution and discuss.
• Is there anything you don’t understand about zip?
• Make sure everyone understands every line of code we supplied.