title: Send by ref/by ptr in python?
body: <p>i need help-i try to send value to method like in c++ by ref/by ptr
  how can i do it?</p>
  
  <p>to exmple:</p>
  
  <pre><code> def test(x):
      x=3    
  
   x=2
   test(x)
   print(x)
  </code></pre>
  
  <p>In this case x a local variable in test method and will not change the "original" X
  so how can i change the "original" X?
  thanks</p>