Python How to inherit methods from an existing instance?

Code

import cgi



class ClassX(object):

  pass # ... with own __repr__



class ClassY(object):

  pass # ... with own __repr__



inst_x=ClassX()



inst_y=ClassY()



inst_z=[ i*i for i in range(25) ]



inst_b=True



class HTMLPrime(object):

   def html(self): # an "enhanced" version of __repr__

       return cgi.escape(self.__repr__()).join(("<H1>","</H1>"))



print HTMLPrime(inst_x).html()

print HTMLPrime(inst_y).html()

wrapped_z = HTMLPrime(inst_z)

inst_z[0] += 70

wrapped_z[0] += 71

print wrapped_z.html()

print HTMLPrime(inst_b).html()

Code

Traceback (most recent call last):

  File "test.py", line 21, in <module>

    print HTMLPrime(inst_x).html()

TypeError: object() takes no parameters