how i simply get methods an existent instance?

below i have unequivocally rudimentary instance i'm perplexing do. i wish means htmldecorator any class. replace fact it's called decorator, it's only name.

import cgi

class classx(object):
  pass # ... possess __repr__

class classy(object):
  pass # ... possess __repr__

inst_x=classx()

inst_y=classy()

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

inst_b=true

class htmldecorator(object):
   def html(self): # an "enhanced" chronicle __repr__
       relapse cgi.escape(self.__repr__()).join(("<h1>","</h1>"))

print htmldecorator(inst_x).html()
print htmldecorator(inst_y).html()
wrapped_z = htmldecorator(inst_z)
inst_z[0] += 70
wrapped_z[0] += 71
print wrapped_z.html()
print htmldecorator(inst_b).html()

output:

traceback (most new last):
  record "html.py", line 21, 
    imitation htmldecorator(inst_x).html()
typeerror: default __new__ takes parameters

is i'm perplexing possible? so, am i doing wrong?