Python对class的理解

我把class分为两类，一类是不带init 方法的类。具体给例子：

class Greeter():    def greet(name):        print( 'Hello, %s' % (name.upper() )  )g = Greeter  # Construct an instance of the Greeter classg.greet('fred')            # Call an instance method; prints "Hello, Fred"

一类是带有init方法的类：

class Greeter(object):    # Constructor    def __init__(self, name):        self.name = name  # Create an instance variable    # Instance method    def greet(self, loud=False):        if loud:            print 'HELLO, %s!' % self.name.upper()        else:            print 'Hello, %s' % self.nameg = Greeter('Fred')  # Construct an instance of the Greeter classg.greet()            # Call an instance method; prints "Hello, Fred"g.greet(loud=True)   # Call an instance method; prints "HELLO, FRED!"

自行体会两种区别