ArcGIS python 退出 pass:不做任何事情，只起到占位的作用

for element in "Python":  
     if element == "y":  
         pass  
     else:  
         print(element)

3、exit():结束整个程序
>```python
for element in "Python":  
     if element == "t":  
         exit()  
     else:
     print(element)