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  1. import random
  2.  
  3. # for readability 
  4. HEADS = 0
  5. TAILS = 1
  6.  
  7. # just defined to get input
  8. yes = 1
  9. no = 0 
  10.  
  11. # determine how many iterations
  12. n = input("How many samples do you wish to compute?: ")
  13. # should we generate a p value for the coin every iteration?
  14. generate_p_every_iteration = input('Should we generate p every iteration? (yes/no): ')
  15.  
  16. # if we should...
  17. if not generate_p_every_iteration:
  18.     p = random.random()
  19.     print "probability of getting heads is:", p
  20.  
  21. correctGuesses = 0
  22. wrongGuesses = 0
  23.  
  24. for i in range(0, n):
  25.  
  26.     if generate_p_every_iteration:
  27.         p = random.random()
  28.  
  29.     # the choice for either heads
  30.     choice = random.randint(HEADS, TAILS)
  31.  
  32.     # actual coin flip
  33.     coinFlip = random.random()
  34.  
  35.     # if we get a heads
  36.     if coinFlip < p:
  37.         # if we guessed heads
  38.         if choice == HEADS:
  39.             # then we guessed correctly
  40.             correctGuesses += 1
  41.         else:
  42.             # otherwise, we guessed wrong
  43.             wrongGuesses += + 1
  44.  
  45.     # otherwise if we got a tails
  46.     else:
  47.         # if we guessed tails
  48.         if choice == TAILS:
  49.             # then we guessed correctly
  50.             correctGuesses += 1
  51.         else:
  52.             # otherwise we got the guess wrong
  53.             wrongGuesses += 1
  54.  
  55.  
  56. percentageCorrect = float(correctGuesses) / n
  57. print "correct guesses:", correctGuesses, "(" + str(percentageCorrect) + ")"
  58. print "wrong guesses:", wrongGuesses, "(" + str(1 - percentageCorrect) + ")"
Success #stdin #stdout 3.4s 10440KB
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stdin
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1000000
no
stdout
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How many samples do you wish to compute?: Should we generate p every iteration? (yes/no): probability of getting heads is: 0.171318334604
correct guesses: 500390 (0.50039)
wrong guesses: 499610 (0.49961)
https://ideone.com/5dUMEu
language:
Python (cpython 2.7.16)
created:
9 years ago
visibility:
public

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