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分类: Python/Ruby

2009-09-22 10:08:58

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


class Person:
    pass # An empty block

p = Person()
print p

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


class Person:
    def sayHi(self):
        print 'Hello, how are you?'

p = Person()
p.sayHi()


# This short example can also be written as Person().sayHi()

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


class Person:
    def __init__
(self, name):
        self.name = name

    def sayHi(self):
        print 'Hello, my name is', self.name

p = Person('Swaroop'
)
p.sayHi()


# This short example can also be written as Person('Swaroop').sayHi()

 

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


class Person:
    '''Represents a person.'''
    population = 0

    def __init__(self, name):
        '''Initializes the person's data.'''
        self.name = name
        print '(Initializing %s)' % self.name

        # When this person is created, he/she
        # adds to the population

        Person.population += 1

    def __del__(self):
        '''I am dying.'''
        print '%s says bye.' % self.name

        Person.population -= 1

        if Person.population == 0:
            print 'I am the last one.'
        else:
            print 'There are still %d people left.' % Person.population

    def sayHi(self):
        '''Greeting by the person.

        Really, that's all it does.'''

        print 'Hi, my name is %s.' % self.name

    def howMany(self):
        '''Prints the current population.'''
        if Person.population == 1:
            print 'I am the only person here.'
        else:
            print 'We have %d persons here.' % Person.population

swaroop = Person('Swaroop'
)
swaroop.sayHi()
swaroop.howMany()

kalam = Person(
'Abdul Kalam'
)
kalam.sayHi()
kalam.howMany()

swaroop.sayHi()
swaroop.howMany()

#!/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)

print # prints a blank line

members = [t, s]
for member in
members:
    member.tell()
# works for both Teachers and Students

 

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