Probability Calculator: Cannot pass test 3

1

I’ve been working on this challenge and it seems that I have completed it but I cannot pass Test #3. When I run the code it gives me a probability very close to the example output.

Is it possible that it is not passing because I am using from collections import Counter import Counter?

Thank you for the help!

import copy
import random
from collections import Counter

class Hat:
    def __init__(self, **kwargs):
        self.__dict__.update(kwargs)
        self.contents = list()
        self.drawn_balls = list()

        for key, value in kwargs.items():
            for _ in range(0, value):
                self.contents.append(key)

    def draw(self, number):
        list_to_remove = copy.copy(self.contents)
        for _ in range(0, number):
            removed_element = random.choice(list_to_remove)
            list_to_remove.remove(removed_element)
            self.drawn_balls.append(removed_element)
        return self.drawn_balls

def experiment(hat, expected_balls, num_balls_drawn, num_experiments):
    M = 0
    for i in range(0, num_experiments):
        # Draw balls and place into list
        ball_drawn = hat.draw(num_balls_drawn)
        # Convert expected_balls into same format as ball_drawn
        target_balls = list()
        for key, value in expected_balls.items():
            for _ in range(0, value):
                target_balls.append(key)
        # Determine if the expected_balls are in the draw_balls list
        if not Counter(target_balls) - Counter(ball_drawn):
            M += 1
        ball_drawn.clear()
    # Calculate probability
    probability = round(M/num_experiments, 3)
    return probability
2

Naah. Take another look at the draw method requirements. Specifically what should happen when wanted is higher number of balls than it is in the hat.

3

Ahhhh thank you! Got to read it more carefully next time

4

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