title: Instances in python
body: <p>I created the following example to understand the instances in python</p>
  
  <pre><code>import time;
  class test:
      mytime = time.time();   
      def __init__(self):
          #self.mytime = time.time();
          time.sleep(1);
          pass
  
  
  from test import test
  
  test1 = test()
  test2 = test()
  
  print test1.mytime
  print test2.mytime
  
  test1.mytime = 12
  
  print test1.mytime
  print test2.mytime
  </code></pre>
  
  <p>in this case the output id the following:</p>
  
  <pre><code>1347876794.72
  1347876794.72
  12
  1347876794.72
  </code></pre>
  
  <p>I expected that the test2.mytime is bigger with 1 second than the test1.mytime. Why doesn't created a copy about the mytime in each instance? </p>