如果try异常处理中存在finally，finally中的代码总会得到执行
下面例子只是作为演示，不用去纠结业务逻辑
看下面的代码，写出输出结果
def dig_dig1():
while True:
print("I'm in while loop")
try:
print("I'm in try")
raise EOFError
except IOError:
print("IOEoor")
finally:
print("I'm in finally")
break
dig_dig1()
原以为会输出的结果：
I'm in while loop I'm in try I'm in finally EOFError Process finished with exit code 1
运行结果
I'm in while loop I'm in try I'm in finally Process finished with exit code 0
看下面的代码，写出输出结果
def dig_dig2(index):
try:
print("I'm in try")
if index < 0:
raise IndexError
else:
return index
except IndexError:
print("I'm in except")
return "except"
finally:
print("I'm in finally")
return "finally"
print(dig_dig2(12))
原以为会输出的结果：
I'm in try 12
运行结果
I'm in try I'm in finally finally Process finished with exit code 0
一般情况下，如果异常处理中存在finally， finally总会被执行。但是，存在以下情况就需要注意：
