Probability Calculator Help on the Experiment part

Python
1

Hi everyone,

So, I have been a bit stuck on the probability calculator as I cannot find a way to put back the balls. I have created an additional function called refill that is supposed to give back the same amount of balls.

I have been trying for the last few days to solve the issue and I almost solved it at one point.

I might be over complicating things so if you could give me some feedback that would be great.

Here is the code:

import copy
import random

from certifi import contents
# Consider using the modules imported above.

class Hat:

  # When an object of type "Hat" is created, a set of variables with key arguments must be created, therefore **kwargs is appropriate to use
  def __init__(self, **kwargs):
    self.contents = list()
    
    # We now want to obtain a list containing the number of balls of    different colours for which we use keys and values present in the dictionnary used
    for key, values in kwargs.items():
      step_up = 0
      while step_up < values:
        self.contents.append(key)
        step_up += 1

    self.copy_content = copy.deepcopy(self.contents)

# The balls passed in this function as arguments are to be withdrawn from the contents list
  def draw(self, balls):
    ball_drawn = list()
    #index_ball_drawn = list()
    step_up = 0
    if balls > len(self.contents):
      ball_drawn = self.contents
    while step_up < balls:
      ball_drawn.append(self.contents.pop(random.randrange(len(self.contents))))
      #index_ball_drawn.append(random.randrange(len(self.contents)))
      step_up += 1
      #dic = {}
      #for through in range(0,len(ball_drawn)):
        #dic[ball_drawn[through]] = index_ball_drawn[through]
      #dic = dict(zip(ball_drawn, index_ball_drawn))
    return ball_drawn#, dic  

  def refill(self):
    self.contents = self.copy_content
    
# Now, we want to create a function that give us the probability to draw certain amount and type of balls from the hat
def experiment(hat, expected_balls, num_balls_drawn, num_experiments):
  won_games = 0
  list_expected_balls = list()
  
  for key, values in expected_balls.items():
    step_up = 0
    while step_up < values:
      list_expected_balls.append(key)
      step_up += 1
  
  for go_through in range(num_experiments):
    drawn_balls_experiment = hat.draw(num_balls_drawn)
    for go_through in drawn_balls_experiment:
      for through in list_expected_balls:
        if go_through == through:
          list_expected_balls.remove(go_through)
        elif len(list_expected_balls) == 0:
          won_games += 1
    hat.refill()
  return won_games/num_experiments

At one point, I tried to create a dictionary with the balls drawn with their respective index to try to put them back exactly where they need to be put back.

I have tried using also a “try” and “except” and much more…

Any help is valuable at this point. I think I have just over complicated this.

image

As you can see the refill function does not work otherwise I would not have gotten this error.

Thanks in advance :slight_smile:

2

One thing I noticed is when you create copy_contents you use deepcopy but when you do refill, you don’t.

3

I would not think it is necessary as I deepcopied its original value at the init() and then assigned that value in the refill function.

Why would there be a need to do a deepcopy once again?

I am just trying to understand here

4

Thanks for the tip.

Today, I finally managed to finish the challenge.

I know it ain’t optimal but at least it is done :slight_smile:

5

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