(self, type, name, attrs, index=None)
type: string describing type of control (see the keys of the
         HTMLForm.type2class dictionary for the allowable values)
        name: control name
        attrs: HTML attributes of control's HTML element
type: string describing type of control (see the keys of the
         HTMLForm.type2class dictionary for the allowable values)
        name: control name
        attrs: HTML attributes of control's HTML element
type : string describing type of control ( see the keys of the HTMLForm . type2class dictionary for the allowable values ) name : control name attrs : HTML attributes of control s HTML element
def __init__(self, type, name, attrs, index=None):
        """
        type: string describing type of control (see the keys of the
         HTMLForm.type2class dictionary for the allowable values)
        name: control name
        attrs: HTML attributes of control's HTML element

        """
        raise NotImplementedError()
def __init__ ( self , type , name , attrs , index = None ) : raise NotImplementedError ( )