Python中類的定義與使用

目標：

1.類的定義

2.父類，子類定義，以及子類呼叫父類

3.類的組合使用

4.內建功能

1.類的定義

**如下：

#

!/usr/bin/env python
#coding:utf8
class
hotel(object):
"""docstring for hotel
"""def
__init__(self, room, cf=1.0, br=15):
self.room =room
self.cf =cf
self.br =br
def cacl_all(self, days=1):
return (self.room * self.cf + self.br) *days
if__name__ == '
__main__':
stdroom = hotel(200)
big_room = hotel(230, 0.9)
print
stdroom.cacl_all()
print stdroom.cacl_all(2)
print
big_room.cacl_all()
print big_room.cacl_all(3)

2.父類、子類以及呼叫父類

**如下：

#

!/usr/bin/env python
#-*- coding: utf-8 -*-#父類
class
addbook(object):
def__init__
(self, name, phone):
self.name =name
self.phone =phone
defget_phone(self):
return
self.phone
#子類，繼承
class
emplemail(addbook):
def__init__
(self, nm, ph, email):
#addbook.__init__(self, nm, ph) # 呼叫父類方法一
super(emplemail, self).__init__
(nm, ph) # 呼叫父類方法二
self.email =email
defget_email(self):
return
self.email#呼叫
if__name__ == "
__main__":
detian = addbook('
handetian
', '
18210413001')
meng = addbook('
shaomeng
', '
18210413002')
print
detian.get_phone()
print
addbook.get_phone(meng)
alice = emplemail('
alice
', '
18210418888
', '
[email protected]')
print alice.get_email(), alice.get_phone()

3.類的組合使用

**如下：

#

!/usr/bin/env python
#-*- coding: utf-8 -*-
'''1.class類的組合使用
2.手機、郵箱、qq等是可以變化的（定義在一起），姓名不可變（單獨定義）。
3.在另乙個類中引用
'''class
info(object):
def__init__
(self, phone, email, qq):
self.phone =phone
self.email =email
self.qq =qq
defget_phone(self):
return
self.phone
defupdate_phone(self, newphone):
self.phone =newphone
print
"手機號更改已更改
"def
get_email(self):
return
self.email
class
addrbook(object):
'''docstring for addbook
'''def
__init__
(self, name, phone, email, qq):
self.name =name
self.info =info(phone, email, qq)
if__name__ == "
__main__":
detian = addrbook('
handetian
', '
18210413001
', '
[email protected]
', '
123456')
print
detian.info.get_phone()
detian.info.update_phone(18210413002)
print
detian.info.get_phone()
print detian.info.get_email()

4.內建功能(函式（）加與不加的區別）

**如下：

#

!/usr/bin/env python
#coding:utf8
class
books(object):
def__init__
(self, title, author):
self.title =title
self.author =author
def__str__
(self):
return
self.title
def__repr__
(self):
return
self.title
def__call__
(self):
print
"%s is written by %s
" %(self.title, self.author)
if__name__ == '
__main__':
pybook = books('
core python
', '
wesley')
print
pybook
pybook()

#

!/usr/bin/env python
#coding:utf8
class
number(object):
"""custum object
add/radd -> +; 
sub/rsub -> -;
mul/rmul -> *;
div/rdiv -> /;
"""def
__init__
(self, number):
self.number =number
def__add__
(self, other):
return self.number +other        
def__radd__
(self, other):
return self.number  +other
def__sub__
(self, other):
return self.number -other
def__rsub__
(self, other):
return other -self.number
def__gt__
(self, other):
if self.number >other:
return
true
return
false
if__name__ == '
__main__':
num = number(10)
print num + 20
print 30 +num
print num - 5
print 11 -num
print num > 20

Python類的定義與使用

class person def init self,name,age,ce self.name name self.self.age age self.ce ce def grassland self 注釋 草叢戰鬥，消耗200戰鬥力 self.ce self.ce 300 def practic...

python 類的定義與使用

1.類定義語法 class car 類名的首字母一般要大寫 def infor self print this is a car car car 例項化物件 car.infor 物件名.成員，訪問成員方法 print isinstance car,car 內建方法isinstance 來測試乙個物件...

Python中類的定義及使用

類是一些有共同特徵和行為事務事物的抽象概念的總和。從中可以看出，方法只能使用例項直接呼叫 無需傳self引數 而使用類呼叫必須傳入例項物件 屬性可以使用例項呼叫，也可以使用類直接呼叫，因此可以看出，其實self就是例項本身，在例項呼叫方法時傳入。被例項化的物件會被編譯器默默的傳入方法的括號中，作為第...