异常处理

异常处理

1）单个报错处理

dic = {}
try:
    dic["name"]
except KeyError as e:
    print("这个key值不存在",e)

结果：
这个key值不存在 'name'

2）2个报错处理

name = []
dic = {}

try:
    name[0]
    dic["name"]
except (KeyError, IndexError) as e:
    print("error",e)

结果：
error list index out of range

3）抓取所有错误处理————不建议这么用

name = []
dic = {}

try:
    name[0]
    dic["name"]
except Exception as e:
    print("错误了。。。",e)

结果：
错误了。。。 list index out of range

4）抓取错误处理

name = []
dic = {}

try:
    # name[0]
    # dic["name"]
    open("test", "r")
except (KeyError, IndexError) as e:
    print("error", e)
except Exception as e:
    print("未知错误。。。", e)

结果：
未知错误。。。 [Errno 2] No such file or directory: 'test'