python - 异常处理

try:

except Exception:

例子：

class Dog(object):
    def __init__(self, name):
        self.name = name
    def eat(self, food):
        print("%s is eating... %s" %(self.name, food))


d = Dog('liuhuayang')

try:
    print(getattr(d, "age"))
except Exception:
    print("extions")

例子2：

data = {"name":"liaodalin"}

try:
    age = data["age"]
except KeyError:
    print("there is no key for age")   # 打印

# 给键制作


data = {"name":"liaodalin"}

try:
    age = data["age"]
except KeyError as e:
    print("there is no key for age ", e)

else的作用：

try:
   xxx
except Exception:
    print("有错")
else:
    print("一切正常！")
finally:
    pring("不管有没有错，都执行")