code: def set_initialize_mode(complexity=2):
          
          if complexity == 3:
              WinFile.initialize = WinFile.level3_initialize
              WinFile.init_mode = 3
          elif complexity == 2:
              WinFile.initialize = WinFile.level2_initialize
              WinFile.init_mode = 2
          elif complexity == 1:
              WinFile.initialize = WinFile.level1_initialize
              WinFile.init_mode = 1
          else:
              raise ValueError("complexity has to be 3, 2 or 1.")
docs: Set initialization mode. Default is slow mode.
          
          **中文文档**
          
          设置WinFile类的全局变量, 指定WinFile.initialize方法所绑定的初始化方式。