为什么这会测试线程的所有权

Question

当我在threading.py模块的类条件部分中阅读源代码时，我的想法是：如果锁归current_thread.self.self .__ lock.acquire（0）拥有，除非它本身失败，否则返回false。锁定

def _is_owned(self):                                                                                                                                                               
  # Return True if lock is owned by current_thread.                                                                                                                              
  # This method is called only if __lock doesn't have _is_owned().                                                                                                               
  if self.__lock.acquire(0):                                                                                                                                                     
      self.__lock.release()                                                                                                                                                      
      return False                                                                                                                                                               
  else:                                                                                                                                                                          
      return True