title: python importing module, find out what is exactly wrong
body: <p>I try to import a module. </p>
  
  <pre><code># coding: utf-8
  import rb
  
  def main():
    print "working"
  
  if __name__ == "__main__":
    main()
  </code></pre>
  
  <p>if "import" directive is present, program prints nothing<br>
   and I get:</p>
  
  <p><img src="https://i.stack.imgur.com/9pwqy.png" alt="enter image description here"></p>
  
  <p>Echo $? shows that program worked correctly. <br>
  How can one check whether module was correctly loaded?</p>
  
  <p>P.S. It seems that this module is present in the directory, <br> 
  because if I delete all another files except interpreted script, I get:</p>
  
  <p>Thanks in advance!</p>