title: Pygame error: not able to open .wav file
body: <p>I have a problem with my Pygame program. I need help. 
  The wav file is in the same directory as the python file.
  I run It in terminal- Python3:</p>
  
  <pre><code>import pygame.mixer
  sounds = pygame.mixer
  sounds.init()
  
  def wait_finish(channel):
      while channel.get_busy():
          pass
  
  asked = 0
  true = 0
  false = 0
  
  choice = str(input("Push 1 for true, 2 for false, 0 to end"))
  while choice != '0':
        if choice == '1':
               asked = asked + 1
               true = true + 1
               s = sounds.Sound("correct.wav")
               wait_finish(s.play())
        if choice == '2':
               asked = asked + 1
               false = false + 1
               s = sounds.Sound("wrong.wav")
               wait_finish(s.play())
        choice = str(input("Push 1 for true, 2 for false, 0 to end"))
  
  print ("you asked" +str(asked) + "questions")
  print ("there were" +str(false) + "wrong answers")
  print ("and" + str(true) + "correct answers")
  </code></pre>
  
  <p>It throws- pygame.error: </p>
  
  <blockquote>
    <p>Unable to open file 'correct.wav'</p>
  </blockquote>