Override a method at instance level
<p>Is there a way in Python to override a class method at instance level?
For example:</p>

<pre><code>class Dog:
    def bark(self):
        print "WOOF"

boby = Dog()
boby.bark() # WOOF
# METHOD OVERRIDE
boby.bark() # WoOoOoF!!
</code></pre>

<p>Thanks</p>
