Python little professor problem set not passing 10 problems check

Question

I am doing the little professor problem set. Here is my code:

import random

def main():
    l = get_level()
    score = 0
    for i in range(10):
        n1 = generate_integer(l)
        n2 = generate_integer(l)
        guesses = 3
        while guesses > 0:
            guess = input(str(n1)+" + "+str(n2)+" = ")
            if guess == str(n1 + n2):
                score += 1
                break
            else:
                print("EEE")
                guesses -= 1
        if guesses == 0:
            print(str(n1)+" + "+str(n2)+" = "+str(n1+n2))
    print("Score: "+str(score))


def get_level():
    while True:
        l = input("Level: ")
        if l.isnumeric():
            if 0 < int(l) <= 3:
                return int(l)


def generate_integer(level):
    if level == 1:
        return random.randrange(0, 9)
    elif level == 2:
        return random.randrange(10, 99)
    else:
        return random.randrange(100, 999)


if __name__ == "__main__":
    main()

And my checks look like:

Results for cs50/problems/2022/python/professor generated by check50 v3.3.11
:) professor.py exists
:) Little Professor rejects level of 0
:) Little Professor rejects level of 4
:) Little Professor rejects level of "one"
:) Little Professor accepts valid level
:) At Level 1, Little Professor generates addition problems using 0–9
:) At Level 2, Little Professor generates addition problems using 10–99
:) At Level 3, Little Professor generates addition problems using 100–999
:( Little Professor generates 10 problems before exiting
    timed out while waiting for program to exit
:| Little Professor displays number of problems correct
    can't check until a frown turns upside down
:| Little Professor displays EEE when answer is incorrect
    can't check until a frown turns upside down
:| Little Professor shows solution after 3 incorrect attempts
    can't check until a frown turns upside down
To see more detailed results go to https://submit.cs50.io/check50/eeff9b18516dcb839d9c0fd50c2d64a0d2b86dc8

It looks like my code is not generating ten problems before exiting. However when I test my code it generates ten problems and displays my score. Yet I am still not passing the check.

Any ideas would be appreciated!

Answer 1

Are you still working on this? If so read on....

Turns out my previous advice is incorrect. (Seems like they used to check for unique problems and I had to implement to pass, but maybe not.)

After much searching, I discovered the real problem is in your generate_integer() function. You used random.randrange() which does NOT include the stop value. So random.randrange(0, 9) will generate values from 0 up to but NOT including 9: e.g., (0,1,2,3,4,5,6,7,8).

There are 2 solutions:

1. Use random.randint() -- it is inclusive. randint(0, 9) will generate a number from 0 up to and including 9.
2. Modify the stop value for random.randrange() -- use random.randrange(0,10) for a level 1 problem (and the same for level 2 and 3).

Fix that and your code should pass.

Answer 2

Read the note under the 4th bullet in How to Test. It says: Your program should output 10 distinct problems...

For example, when I ran your program, it prompted with "4+0" and "8+2" twice each in 1 set of 10 problems. So there were really only 8 problems. Modify you code to eliminate duplicates, and I think it will pass.