Python基础学习代码之面向对象编程

class AddrBookEntry(object):
 'address book entry class'
 def __init__(self,nm,ph):
 self.name = nm
 self.phone = ph
 print 'created instance for:',self.name
 def updatephone(self,newph):
 self.phone = newph
 print 'update phone for:',self.name
 def updatename(self,newname):
 self.name = newname
 print 'update phone for:',self.phone
john = AddrBookEntry('xiewenbin','13711710490')
print john.name
print john.phone
john.updatephone('18617311540')
john.updatename('xwb')
print john.phone
print john.name
class EmpAddrBookEntry(AddrBookEntry):
 'employee address book entry class'
 def __init__(self,nm,ph,id,em):
 AddrBookEntry.__init__(self,nm,ph)
 self.empid = id
 self.email = em
 def updateemail(self,newem):
 self.email = newem
 print 'update email address for:',self.name
jone = EmpAddrBookEntry('jone doe','408-555-1212',42,'543361609@qq.com')
print jone.name
print jone.phone
print jone.email
jone.updatephone('18617311541')
print jone.phone
jone.updateemail('186@qq.com')
print jone.email
class HotelRoomCalc(object):
 'hotel room rate calculator'
 def __init__(self,rt,sales=0.084,rm=0.1):
 '''hotelroot calc default arguments:
 sales tax == 8.5% and room tax == 10%'''
 self.salestax = sales
 self.roomtax = rm
 self.rootrate = rt
 def cacltotal(self,days=1):
 'calculator total;default to daily rate'
 daily = round((self.rootrate * (1 + self.roomtax + self.salestax)),2)
 return float(days) * daily
sfo = HotelRoomCalc(299)
print sfo.cacltotal(3)
class TestStaticMethod(object):
 @staticmethod
 def foo():
 print 'calling static method foo()'
class TestClassMethod(object):
 @classmethod
 def foo(cls):
 print 'calling class method foo()'
 print 'foo() is part of class:',cls.__name__
class C(object):
 foo = 100
print C.foo + 1
class Myclass(object):
 'myclass class definition'
 myversion = 19.0
 def showmyversion(self):
 print Myclass.myversion
mc = Myclass()
mc.showmyversion()
print dir(Myclass)
print Myclass.__dict__
"""
class InstCt(object):
 count = 0
 def __init__(self):
 InstCt.count += 1
 def __del__(self):
 InstCt.count -= 1
 def howmany(self):
 return InstCt.count
a = InstCt()
b = InstCt()"""
x = 3 + 0.14j
print x.__class__
print [type(getattr(x,i)) for i in ('conjugate','imag','real')]
class Foo(object):
 x = {2003:'poe2'}
foo = Foo()
print foo.x
foo.x[2004] = 'xie'
print foo.x
print Foo.x
del foo.x
print foo.x
print Foo.x