571     def set_param(self, param, value, header='Content-Type', requote=True,  argument
598                 ctype = _formatparam(param, value, requote)
601                     [ctype, _formatparam(param, value, requote)])
605                                                         unquote=requote):
608                     append_param = _formatparam(param, value, requote)
610                     append_param = _formatparam(old_param, old_value, requote)
619     def del_param(self, param, header='content-type', requote=True):  argument
630         for p, v in self.get_params(header=header, unquote=requote):
633                     new_ctype = _formatparam(p, v, requote)
636                                                 _formatparam(p, v, requote)])
641     def set_type(self, type, header='Content-Type', requote=True):  argument
666         params = self.get_params(header=header, unquote=requote)
671             self.set_param(p, v, header, requote)