Python每日一练--------异常处理

1.主程序入口

if _name_=='_main_':

2.(except 和finally不能同时出现)

 try--except-else

try--finally

raise (也可自定义)

try:
   Business Logic here...
except "Invalid level!":
   Exception handling here...
else:
   Rest of the code here...

try:
   raise Networkerror("Bad hostname")
except Networkerror,e:
   print e.args

自定义

def functionName( level ):
   if level < 1:
      raise "Invalid level!", level