#自定义异常类
class MyException(Exception):
    pass

def exextp_01():
    try:
        #come code here
        list = ['java','python','php']
        raise MyException  #通过异常名字抓取自定义异常 
    except:
        print 'no thie is variabe'
        print 'MyException encoutered!'

exextp_01()

def except_test():
    for i in range(1,100):
        try:
            print  "Number %s"%i
            time.sleep(0.2)
        except KeyboardInterrupt:
            print 'Please do not interupt me ,I am doing the important tash here!'
            continue

===================
try    finally 
学习

def exception_03():
    try:
       raise MyExepion,"and some addition add is not exception"
    except MyExepion,data:
        print "MyException encoutered!"
        print data

exception_03()

def exception_02():
    try:
        raise MyExepion
    except MyExepion:
        print "MyException encoutered"
    finally:
        print "Arrive finally"

def exeption_01():
    try:
        print "normal code here" \
              ", this is here"
    except MyExepion:
        print "MyEception encoutered"
    else:
        #No exceptions will execute the else
        print "No exception"  #You can test your module

#exeption_01()