python类继承用法实例分析

#!/usr/bin/python
# Filename: inherit.py

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. Shrividya',40,30000)
s = Student('Swaroop',22,75)
members = [t, s]
for member in members:
  member.tell()# works for both Teachers and Students

(Initialized SchoolMember: Mrs. Shrividya)
(Initialized Teacher: Mrs. Shrividya)
(Initialized SchoolMember: Swaroop)
(Initialized Student: Swaroop)
Name:"Mrs. Shrividya" Age:"40" Salary: "30000"
Name:"Swaroop" Age:"22" Marks: "75"