'Normalise form after all controls have been added.
This is usually called by ParseFile and ParseResponse.  Don\'t call it
youself unless you\'re building your own Control instances.
This method should only be called once, after all controls have been
added to the form.'

def fixup(self):

    for control in self.controls:
        control.fixup()
    self.backwards_compat = self._backwards_compat
