sword = pwd
self.email = email
USER_LIST = [对象(用户/密码/邮箱),对象(用户/密码/邮箱),对象(用户/密码/邮箱)]
while True:
user = input('请输入用户名:')
pwd = input('请输入密码:')
email = input('请输入邮箱:')
p = Person(user,pwd,email)
USER_LIST.append(p)
for item in USER_LIST:
temp = "我的名字:%s,密码:%s,邮箱%s" %(item.username,item.password,item.email,)
print(temp)
# ########## 面向对象写法
class Person:
def __init__(self,user,pwd,email):
self.username = user
self.password = pwd
self.email = email
def info(self):
return "我的名字:%s,密码:%s,邮箱%s" %(item.username,item.password,item.email,)
USER_LIST = [对象(用户/密码/邮箱),对象(用户/密码/邮箱),对象(用户/密码/邮箱)]
while True:
user = input('请输入用户名:')
pwd = input('请输入密码:')
email = input('请输入邮箱:')
p = Person(user,pwd,email)
USER_LIST.append(p)
for item in USER_LIST:
msg = item.info()
print(msg)
2.4 小练习:游戏开发
class Police:
def __init__(self,name)
self.name = name
self.hp = 10000
def tax(self):
msg = "%s收了个税。" %(self.name,)
print(msg)
def fight(self):
msg = "%s去战了个斗。" %(self.name,)
lsq = Police('张三')
zzh = Police('渣渣会')
tyg = Police('堂有光')
class Bandit:
def __init__(self,nickname)
self.nickname = nickname
self.hp = 1000
def murder(self,name):
msg = "%s去谋杀了%s" %(self.nickname, name,)
lcj = Bandit('二蛋')
lp = Bandit('二狗')
zsd = Bandit('狗蛋')
# 1. 二狗去谋杀渣渣会,二狗生命值-100; 渣渣会生命值减5000
lp.murder(zzh.name)
lp.hp = lp.hp - 100
zzh.hp = zzh.hp - 5000
# ...
class Police:
def __init__(self,name)
self.name = name
self.hp = 10000
def dao(self,other):
msg = "%s个了%s一刀。" %(self.name,other.nickname)
self.hp = self.hp - 10
other.hp = other.hp - 50
print(msg)
def qiang(self):
msg = "%s去战了个斗。" %(self.name,)
def quan(self,other):
msg = "%s个了%s一全。" %(self.name,other.nickname)
self.hp = self.hp - 2
other.hp = other.hp - 10
print(msg)
class Bandit:
def __init__(self,nickname)
self.nickname = nickname
self.hp = 1000
def qiang(self,other):
msg = "%s个了%s一全。" %(self.nickname,other.name)
self.hp -= 20
other.hp -= 500
lcj = Bandit('二蛋')
lsq = Police('张三')
lsq.dao(lcj)
lsq.quan(lcj)
lcj.qiang(lsq)
3 面向对象的三大特性
3.1 封装
封装思想:将同一类的函数封装到了同一个py文件中,以后方便使用。
面向对象也有封装的作用:将同一类的函数封装到一个类中。(广义)
广义的封装 :类中的成员
狭义的封装 :私有成员
只能在类的内部使用,既不能在类的外部调用,也不能在子类中使用
如果写代码时,函数比较多比较乱。
- 1.可以将函数归类并放到同一个类中。
- 2.函数如果有一个反复使用的公共值,则可以放到对象中。
class File:
def read(self):
pass
def write(self):
pass
class Person:
def __init__(sef,name,age):
self.name = name
self.age = age
p = Person('alex',19)
3.2 继承
# 父类(基类/超类)
class Base:
def f1(self):
pass
# 子类(派生类)
class Foo(Base):
def f2(self):
pass
# 创建了一个子类的对象
obj = Foo()
# 执行对象.方法时,优先在自己的类中找,如果没有就是父类中找。
obj.f2()
obj.f1()
# 创建了一个父类的对象
obj = Base()
obj.f1()
问题:什么时候才能用到继承?
- 多个类中如果有公共的方法,可以放到基类中避免重复编写。
class Base:
def f1(self):
pass
class Foo(Base):
def f2(self):
pass
class Bar(Base):
def f3(self):
pass
obj1 = Foo()
obj2 = Bar()
继承关系中的查找方法的顺序:
# 示例一
class Base:
def f1(self):
print('base.f1')
class Foo(Base):
def f2(self):
print('foo.f2')
obj = Foo()
obj.f1()
obj.f2()
# 示例二
class Base:
def f1(self):
print('base.f1')
class Foo(Base):
def f2(self):
self.f1()
print('foo.f2')
obj = Foo()
obj.f2()
# 示例三
class Base:
def f1(self):
print('base.f1')
class Foo(Base):
def f2(self):
self.f1()
print('foo.f2')
def f1(self):
prin