1.文件的异常处理：try except FileNotFoundError
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try:
open("abc.txt",'r')
except FileNotFoundError:
print("异常了！")
2.name的异常 try except NameError
try :
print(aa)
except NameError:
print("异常了！")
3.可以使用BaseException类处理所以的异常
try:
open("abc.txt",'r')
print(aa)
except BaseException:
print("异常了！")
4.打印异常日志
try:
# open("abc.txt",'r')
print(aa)
except BaseException as msg:
print("异常了！")
print(msg)
5.python中常见的异常：
（1）try ...else..
try:
aa="异常测试"
print(aa)
except Exception as msg:
print(msg)
else:
print("没有异常！")
(2)try ...finally..
try:
# open("abc.txt",'r')
print(aa)
except BaseException as msg:
print("异常了！")
print(msg)
finally:
print("我都会执行！")
6.抛出异常