[Python基础]008.异常

try:
    f = open(‘data.txt‘)
    f.read()
    print zz
    print 5/0
except IOError, e:              # 捕获IO异常，变量e接收具体的错误信息
    print e
except NameError, e:            # 捕获名字异常
    print e
except Exception, e:            # 捕获剩下的其他异常
    print e

else:                           # 没有异常时执行
    print ‘no error‘            

finally:                        # 无论有无异常都会执行的内容
    print ‘do anyway‘

def error_fun():
    raise Exception(‘it is an error function‘)  # 抛出一个通用异常Exception

# 捕获上面的异常 
try:
    error_fun()
execept Exception, e:
    print e

# 自定义异常
class MyException(Exception):
    def __init__(self, arg, arg2):
        Exception.__init__(self, arg)
        self.arg2 = arg2

# 捕获
try:
    raise MyException(‘abc‘, 10)
except MyException, e:
    print e, e.arg2