[PYTHON URLLIB2] HELP ME HELP ME HELP ME (Italian boy)

[Pigio®]

My problem is this: I would like modify urllib2 exception HTTPError to
permit it returns more attributes that I can use to read web page souce
code.
I have understood that I must add args attribute such tuple of  return
element (but I don't have understood the reason) but, what can I do to add
this attribute if  HTTPError class doesn't declare its attributes at
beginning?
Thanks to all


Ennio