python 简码教程 类练习

 以前都写的面向过程，一下转到OOP还真不适应，于是小练了一下，跟着书本都搞错了郁闷

不动手不知道，一动手吓一跳！mark下来椅子鞭策

 

1、python\method.py", line 4

    p = Person()

               ^

IndentationError: unindent does not match any outer indentation level

因为将调用类的语句错误的缩进在类里面导致报错，修改缩进后通过

 

 

2、inherit.py", line 21, in tell

    print 'Salary:"%d"' % self.salary

AttributeError: Teacher instance has no attribute 'salary'

变量的大小写搞错，导致无法识别变量

 

 

3、TypeError: _new_() takes exactly 3 arguments (2 given)

函数定义__多了下划线___ __导致

 

 

代码：

class SchoolMember:

    '''Represents any school member.'''

    def __init__(self,name,age):

        self.name = name

        self.age = age

        print '(Initialized SchoolMember: %s)' %self.name



    def tell(self):

        '''Tell my details.'''

        print 'Name:"%s" Age:"%s"' %(self.name,self.age),



class Teacher(SchoolMember):

    '''Represents a teacher . '''

    def __init__(self, name, age, salary):

        SchoolMember.__init__(self,name,age)

        self.salary = salary

        print '(Initialized Teacher: %s)'%self.name



    def tell(self):

        SchoolMember.tell(self)

        print 'Salary:"%d"' % self.salary



class Student(SchoolMember):

    '''Represents a student.'''

    def __init__(self,name,age,marks):

        SchoolMember.__init__(self,name,age)

        self.marks = marks

        print 'Initialized Student: %s' %self.name



    def tell(self):

        SchoolMember.tell(self)

        print 'Marks: "%d"' %self.marks





t = Teacher('Mrs.Hw',28,1500)

s = Student('Cx',18,80)



print #prints a blank line



members = [t,s]

for member in members:

    member.tell()#works for both Teachers and Students