第十节：python异常处理、类
-----------------------python异常处理-------------------------try:
name=['a','b','c']
name
except IndexError:
print 'you list is out of range.........'
意思是让原本的错误改成自己想要的错误提示。
try:
name=['a','b','c']
#name
info_dic={}
info_dic['alex']
#except (IndexError,KeyError):
except IndexError:
print 'you list is out of range.........'
except KeyError:
print 'The key error...............'
自定义异常：
class myexception（exception）:
pass
try:
raise myexception
name=raw_input().strip()
if name != 'darren':
raise myexception
except myexception:
print 'no valid name specil!'
总是打印一个错误：
try:
name=raw_input()
if len(name)=2:
print 'aaa.........'
else:
print 'bbb..........'
finally:
print 'going to shutdown........'
---------------------------------------python类-------------------------------------------
类的语法：
class dog：
def name(self):
print "hello,master,my name is python!"
D=dog() #将类赋给D这个变量
D.name() #引用dog类下面的name方法。
----------------
#初始化函数：def __init__为初始化函数，函数里的第一个变量就是类的名字，等于把类Person传给self，
#!/usr/bin/env python
class Person:
def __init__(self,name,age):
print "i am being called right now"
self.Name=name
self.Age=age
def sayhi(self):
print "hi,my name is %s,my age:%s" %(self.Name,self
.Age)
p= Person('darren',22)
p.sayhi()
##################################################
class Dog:
name='hanxin'
def sayhi(self):
print "hello,master,my name is python!"
print "my name is:",self.name
def saying(self,food):
if food == 'bone':
print 'i like it very much'
else:
print"do not give me"
d = Dog()
d.sayhi()
d.saying(bone)
#这里的类等于把dog传给self，self就是类。类下的多个函数是不能相互通信的，如果要通信要先传给类
#########################################
class Dog:
name='hanxin'
def sayhi(self):
print "hello,master,my name is python!"
print "my name is:",self.name
likefood='bone'
self.likefood=likefood#把函数变量变为类变量
def saying(self,food):
if food == self.likefood: #调用其他函数的变量这里不能直接调用，而是需要调用类变量才可以。
print 'i like it very much'
else:
print"do not give me"
d = Dog()
d.sayhi()
d.saying('bone')
########################################
#类的继承：
class schoolmember:
def __init__(self,name,sex,national='china'):
self.name=name
self.sex=sex
self.national=national
def tell(self):
print "hi,my name is %s,i am from %s"%(self.name,self.national)
class student(schoolmember):
def __init__(self,NAME,SEX,CLASS,SCORE,NATIONAL):
schoolmember.__init__(self,NAME,SEX,NATIONAL)
self.CLASS=CLASS
self.SCORE=SCORE
def paytuition(self,amount):
if amount < 6499:
print "get the fuck off....."
else:
print 'welcome onboard!'
class teacher(schoolmember):
def __init__(self,NAME,SEX,COURSE,SALARY,NATIONAL):
schoolmember.__init__(self,NAME,SEX,NATIONAL)
self.COURSE=COURSE
self.SALARY=SALARY
def teachering(self):
print "i am teaching %s,i am makeing %s per month!"%(self.COURSE,self.SALARY)
s1=student('wangzhendong','man','python','A+','china')
s1.tell()
s2=student('darren','man','linux','a+','us')
s2.tell()
t1=teacher('darren','man','couse','7000','hanguo')
##############################################################
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