title: object properties in python
body: <pre><code>   class test:
        a="hi"
  
        def msg(self):
            print the variable for which the object is referring to
  
     t= test()
      print t.b
  </code></pre>
  
  <p>From the above code is there any way to tell that the object is referring to a variable b which does not exist</p>