### try...多个exception结构
try:
语句块
excep Exception1:
处理异常
excep Exception2:
处理异常
...
except BaseException:
处理更多可能遗漏的异常语句
### try...多个exception结构
try:
语句块
excep Exception1:
处理异常
excep Exception2:
处理异常
...
except BaseException:
处理更多可能遗漏的异常语句