这里，我定义了一个类，初始化函数，Show函数，并且定义了文档字符串，使用了help函数和__doc__来调用文档字符串

>>> class FooClass(object):    "This is my first class !"    def __init__(self, name="NoName"):        "This is a kinda construct funtion."        self.name = name    def show(self):        "This is a print function."        print 'My name is', self.name        >>> fc = FooClass('Tiejiaxiaobao')>>> fc.show()My name is Tiejiaxiaobao>>> help(FooClass)Help on class FooClass in module __main__:class FooClass(__builtin__.object) |  This is my first class ! |   |  Methods defined here: |   |  __init__(self, name='NoName') |      This is a kinda construct funtion. |   |  show(self) |      This is a print function. |   |  ---------------------------------------------------------------------- |  Data descriptors defined here: |   |  __dict__ |      dictionary for instance variables (if defined) |   |  __weakref__ |      list of weak references to the object (if defined)>>> help(FooClass.show)Help on method show in module __main__:show(self) unbound __main__.FooClass method    This is a print function.>>> FooClass.__doc__

'This is my first class !'>>> FooClass.show.__doc__'This is a print function.'>>>

 这里，我分别测试了几种类成员变量的声明方式，试图发现关于变量定义的规律

>>> class FooClass(object):    #members list    name = 'NoName'    name1 = 'NoName1'    name2 = 'NoName2'    def __init__(self, name):        self.name = name    def func1(self):        self.name1 = self.name        print self.name1    def func2(self):        self.name2 = self.name1        print self.name2        >>> obj = FooClass('Tie Jia Xiao Bao')>>> obj.name2'NoName2'>>> obj.func2()NoName1>>> obj.func1()Tie Jia Xiao Bao>>> obj.func2()Tie Jia Xiao Bao>>> obj.__dict__{
    'name2': 'Tie Jia Xiao Bao', 'name': 'Tie Jia Xiao Bao', 'name1': 'Tie Jia Xiao Bao'}>>> obj = FooClass('Tie')>>> obj.__dict__{
    'name': 'Tie'}>>> obj.func2()NoName1>>> obj.__dict__{
    'name2': 'NoName1', 'name': 'Tie'}>>> obj.name1'NoName1'>>> obj.__dict__{
    'name2': 'NoName1', 'name': 'Tie'}>>> obj.func1()Tie>>> obj.__dict__{
    'name2': 'NoName1', 'name': 'Tie', 'name1': 'Tie'}>>>