Python2静态方法具有引用该类的默认参数

Question

class Freshdesk_IO(object):

  FRESHDESK = u"FRESHDESK"

  @staticmethod
    def create_ticket(ticket, attached_files=list([]), first_try=True, platform=Freshdesk_IO.FRESHDESK):
      pass

使用此代码，我得到

def create_ticket(ticket, attached_files=list([]), first_try=True, platform=Freshdesk_IO.FRESHDESK):
NameError: name 'Freshdesk_IO' is not defined

我不能在静态方法中将FRESHDESK常量用作默认参数吗？

感谢您的帮助