一：面向过程 与 面向对象
面向过程：
核心是‘过程’二字
过程的终极奥义：将程序流程化
过程是‘流水线’，用来分步骤解决问题的
面向对象：
核心是‘对象’二字
对象的终极奥义：将程序‘整合’
对象是‘容器’，用来盛放 数据 与 功能的
程序 = 数据 + 功能
二：实现方法
初级版
# 学生的数据
stu_name = ‘xxq‘
stu_age = 18
stu_gender = ‘male‘
# 学生的功能
def tell_stu_info():
print(f‘学生信息 - 名字：{stu_name} 年龄：{stu_age} 性别：{stu_gender}‘)
# 课程的数据
course_name = ‘python‘
course_period = ‘6month‘
course_score = 10
# 课程的功能
def tell_course_info():
print(f‘课程信息 - 名称：{course_name} 周期：{course_period} 学分：{course_score}‘)
def set_info():
global stu_name
global stu_age
global stu_gender
stu_name = ‘egon‘
stu_age = 80
stu_gender = ‘female‘
tell_stu_info()
set_info()
进阶版
# 学生的功能
def tell_stu_info(stu_obj):
print(‘学生信息 - 名字：%s 年龄：%s 性别：%s‘ % (
stu_obj[‘stu_name‘],
stu_obj[‘stu_age‘],
stu_obj[‘stu_gender‘]
))
def set_info(stu_obj, x, y, z):
stu_obj[‘stu_name‘] = x
stu_obj[‘stu_age‘] = y
stu_obj[‘stu_gender‘] = z
# stu_name = ‘egon‘
# stu_age = 80
# stu_gender = ‘female‘
stu_obj = {
‘stu_name‘: ‘xxq‘,
‘stu_age‘: 18,
‘stu_gender‘: ‘male‘,
‘tell_stu_info‘: tell_stu_info,
‘set_info‘: set_info,
}
print(stu_obj)
高级版
# 学生的功能
def tell_stu_info(stu_obj):
print(‘学生信息 - 名字：%s 年龄：%s 性别：%s‘ % (
stu_obj[‘stu_name‘],
stu_obj[‘stu_age‘],
stu_obj[‘stu_gender‘]
))
def set_info(stu_obj, x, y, z):
stu_obj[‘stu_name‘] = x
stu_obj[‘stu_age‘] = y
stu_obj[‘stu_gender‘] = z
# stu_name = ‘egon‘
# stu_age = 80
# stu_gender = ‘female‘
stu_obj = {
‘stu_school‘: ‘oldboy‘,
‘stu_name‘: ‘xxq‘,
‘stu_age‘: 18,
‘stu_gender‘: ‘male‘,
‘tell_stu_info‘: tell_stu_info,
‘set_info‘: set_info,
}
stu1_obj = {
‘stu_school‘: ‘oldboy‘,
‘stu_name‘: ‘qwe‘,
‘stu_age‘: 18,
‘stu_gender‘: ‘female‘,
‘tell_stu_info‘: tell_stu_info,
‘set_info‘: set_info,
}
print(stu_obj)
实现面向对象
Python中的面向对象语法
类 是对象相似数据 与 功能的 集合体
所以，类中最常见的是变量 与 函数 的定义，但是 类体中 其实是可以包含任意其他代码的
注意：类体代码 是在 类定义阶段就会立即执行的
class Student:
# 1.变量的定义
stu_school = ‘oldboy‘
# 2.功能的定义
def tell_stu_info(stu_obj):
print(‘学生信息 - 名字：%s 年龄：%s 性别：%s‘ % (
stu_obj[‘stu_name‘],
stu_obj[‘stu_age‘],
stu_obj[‘stu_gender‘]
))
def set_info(stu_obj, x, y, z):
stu_obj[‘stu_name‘] = x
stu_obj[‘stu_age‘] = y
stu_obj[‘stu_gender‘] = z
# print(‘=======>‘)
# 属性访问的语法
# 1.访问数据属性
# 2.访问函数属性
# print(Student.__dict__) # {‘__module__‘: ‘__main__‘, ‘stu_school‘: ‘oldboy‘, ‘tell_stu_info‘: <function Student.tell_stu_info at 0x035B8418>, ‘set_info‘: <function Student.set_info at 0x035B83D0>, ‘__dict__‘: <attribute ‘__dict__‘ of ‘Student‘ objects>, ‘__weakref__‘: <attribute ‘__weakref__‘ of ‘Student‘ objects>, ‘__doc__‘: None}
# print(Student.stu_school) # oldboy
# 再调用类产生对象
stu1_obj = Student()
stu2_obj = Student()
stu3_obj = Student()
# stu1_obj.__dict__[‘stu_name‘] = ‘eogn‘
# stu1_obj.__dict__[‘stu_age‘] = 16
# stu1_obj.__dict__[‘stu_gender‘] = ‘male‘
# print(stu1_obj.__dict__) # {‘stu_name‘: ‘eogn‘, ‘stu_age‘: 16, ‘stu_gender‘: ‘male‘}
stu1_obj.stu_name = ‘eogn‘
stu1_obj.stu_age = 16
stu1_obj.stu_gender = ‘male‘
print(stu1_obj.__dict__) # {‘stu_name‘: ‘eogn‘, ‘stu_age‘: 16, ‘stu_gender‘: ‘male‘}
属性查找
一：属性查找
class Student:
# 1、变量的定义
stu_school = ‘oldboy‘
count = 0
# 空对象,‘egon‘,18,‘male‘
def __init__(self, x, y, z):
Student.count += 1
self.stu_name = x # 空对象.stu_name=‘egon‘
self.stu_age = y # 空对象.stu_age=18
self.stu_gender = z # 空对象.stu_gender=‘male‘
# return None
# 2、功能的定义
def tell_stu_info(self):
print(‘学生信息：名字：%s 年龄：%s 性别：%s‘ % (
self.stu_name,
self.stu_age,
self.stu_gender
))
def set_info(self, x, y, z):
self.stu_name = x
self.stu_age = y
self.stu_gender = z
def choose(self, x):
print(‘正在选课‘)
self.course = x
stu1_obj = Student(‘egon‘, 18, ‘male‘) # Student.__init__(空对象,‘egon‘,18,‘male‘)
stu2_obj = Student(‘lili‘, 19, ‘female‘)
stu3_obj = Student(‘jack‘, 20, ‘male‘)
# print(stu1_obj.count)
# print(stu2_obj.count)
# print(stu3_obj.count)
二：类中存放的是对象共有的数据与功能
1.类可以访问：
# 1.类的数据属性
print(Student.stu_school) # oldboy
# 2.类的函数属性
print(Student.tell_stu_info) # <function Student.tell_stu_info at 0x00F78460>
print(Student.set_info) # <function Student.set_info at 0x01728418>
2.但其实类中的东西是给对象用的
# 1.类的数据属性是共享给所有对象用的，大家访问的地址都一样
print(id(Student.stu_school)) # 23914752
print(id(stu1_obj.stu_school)) # 23914752
print(id(stu2_obj.stu_school)) # 23914752
print(id(stu3_obj.stu_school)) # 23914752
Student.stu_school=‘OLDBOY‘
stu1_obj.stu_school=‘OLDBOY‘
print(stu1_obj.stu_school) # OLDBOY
print(Student.stu_school) # OLDBOY
print(stu2_obj.stu_school) # OLDBOY
print(stu3_obj.stu_school) # OLDBOY
3.类中定义的函数主要是给对象使用的，而且是绑定给对象的，虽然所有对象指向的都是相同的功能，但是绑定到不同的对象就是不同的绑定方法，内存地址各不相同
# 类调用自己的函数属性必须严格按照函数的用法来
print(Student.tell_stu_info) # <function Student.tell_stu_info at 0x00A58460>
print(Student.set_info) # <function Student.set_info at 0x00A58418>
Student.tell_stu_info(stu1_obj) # 学生信息：名字：egon 年龄：18 性别：male
Student.tell_stu_info(stu2_obj) # 学生信息：名字：lili 年龄：19 性别：female
Student.tell_stu_info(stu3_obj) # 学生信息：名字：jack 年龄：20 性别：male
Student.set_info(stu1_obj,‘EGON‘,19,‘MALE‘)
Student.tell_stu_info(stu1_obj) # 学生信息：名字：EGON 年龄：19 性别：MALE
# 绑定方法的特殊之处在于：谁来调用绑定方法就会将谁当做第一个参数自动传入
print(Student.tell_stu_info) # <function Student.tell_stu_info at 0x01948460>
print(stu1_obj.tell_stu_info) # <bound method Student.tell_stu_info of <__main__.Student object at 0x0194B0B8>>
print(stu2_obj.tell_stu_info) # <bound method Student.tell_stu_info of <__main__.Student object at 0x0194B070>>
print(stu3_obj.tell_stu_info) # <bound method Student.tell_stu_info of <__main__.Student object at 0x0194B250>>
stu1_obj.tell_stu_info() # tell_stu_info(stu1_obj) # 学生信息：名字：egon 年龄：18 性别：male
stu2_obj.tell_stu_info() # tell_stu_info(stu2_obj) # 学生信息：名字：lili 年龄：19 性别：female
stu3_obj.tell_stu_info() # tell_stu_info(stu3_obj) # 学生信息：名字：jack 年龄：20 性别：male
stu1_obj.choose(‘python全栈开发‘)
print(stu1_obj.course)
# 正在选课
# python全栈开发
stu2_obj.choose(‘linux运维‘)
print(stu2_obj.course)
# 正在选课
# linux运维
stu3_obj.choose(‘高级架构师‘)
print(stu3_obj.course)
# 正在选课
# 高级架构师
l1 = [‘aa‘, ‘bb‘, ‘cc‘] # l=list([1,2,3])
l2 = [111, 222, 333] # l=list([1,2,3])
print(l1.append) # <built-in method append of list object at 0x0114D048>
print(list.append) # <method ‘append‘ of ‘list‘ objects>
l1.append(‘dd‘)
l2.append(‘dd‘)
print(l1) # [‘aa‘, ‘bb‘, ‘cc‘, ‘dd‘]
print(l2) # [111, 222, 333, ‘dd‘]
l1 = [‘aa‘, ‘bb‘, ‘cc‘] # l=list([1,2,3])
l2 = [111, 222, 333] # l=list([1,2,3])
list.append(l1, ‘dd‘)
list.append(l2, ‘dd‘)
print(l1) # [‘aa‘, ‘bb‘, ‘cc‘, ‘dd‘]
print(l2) # [111, 222, 333, ‘dd‘]
