Process Oriented Programming(POP) & Object Oriented Programming(OOP)
"""面向过程与面向对象"""
# Process Oriented Programming(POP)
std1={'name':'Bob','score':98}
std2={'name':'Tom','score':95}
def print_score(std):
print('%s,%s' %(std['name'],std['score']))
# Object Oriented Programming(OOP)
class Student(object):
def __init__(self,name,score): #定义类属性的特殊方法“__init__”前后分别有两个下划线！！！
self.name = name
self.score = score
def print_score(self): #类内部定义函数实现数据封装
print('%s:%s' %(self.name,self.score))
def get_grade(self):
if self.score >=90:
return 'A'
elif self.score >=80:
return 'B'
elif self.score >=60:
return 'C'
else:
return 'D'
Mary = Student('Mary',60)
Jerry = Student('Jerry',75)
Mary.print_score()
Jerry.print_score()
print(Mary.name,Mary.get_grade())
print(Jerry.name,Jerry.get_grade())
"""
和普通的函数相比，在类中定义的函数只有一点不同，就是第一个参数永远是实例变量self，并且，调用时，不用传递该参数。除此之外，类的方法和普通函数没有什么区别，所以，你仍然可以用默认参数、可变参数、关键字参数和命名关键字参数。
"""
# 访问限制
class Student(object):
def __init__(self,name,score,gender): #定义类属性的特殊方法“__init__”前后分别有两个下划线！！！
self._name = name
self._score = score
self._gender = gender
def print_score(self): #类内部定义函数实现数据封装
print('%s:%s:%s' %(self._name,self._score,self._gender))
def get_grade(self):
if self._score >=90:
return 'A'
elif self._score >=80:
return 'B'
elif self._score >=60:
return 'C'
else:
return 'D'
def get_name(self):
return self._name
def get_score(self):
return self._score
def get_gender(self):
return self._gender
def set_name(self,name):
if type(name)==str:
self._name = name
else:
raise ValueError('bad name')
def set_score(self,score):
if 0<=score<=100:
self._score=score
else:
raise ValueError('bad score')
def set_gender(self,gender):
if gender == 'male' or 'famale':
self._gender = gender
else:
raise ValueError('bad gender')
