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

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