一文读懂Python中的异常处理

异常处理在任何一门编程语言里都是值得关注的一个话题，良好的异常处理可以让你的程序更加健壮，清晰的错误信息更能帮助你快速修复问题。在Python中，和不部分高级语言一样，使用了try/except/finally语句块来处理异常，如果你有其他编程语言的经验，实践起来并不难。

异常处理语句 try...excpet...finally

实例代码

defdiv(a, b):

try:

print(a / b)

exceptZeroDivisionError:

print("Error: b should not be 0 !!")

exceptExceptionase:

print("Unexpected Error: {}".format(e))

else:

print('Run into else only when everything goes well')

finally:

print('Always run into finally block.')

# tests

div(2,0)

div(2,'bad type')

div(1,2)

# Mutiple exception in one line

try:

print(a / b)

except(ZeroDivisionError, TypeError)ase:

print(e)

# Except block is optional when there is finally

try:

open(database)

finally:

close(database)

# catch all errors and log it