wiki:shunfa/2009/1029

Python Note

Object and Class

constructor

物件建立時,物件本身所執行的函式

example:

class myClass:
    def __init__(self):
        print self

result: >>> myClass

<class __main__.myClass at 0x011ED690>

內建屬性

  • classname.__dict__: 類別內的屬性以辭典集物件方式儲存

example:

class myClass:
 "A simple example class"
 a=123

result: >>> myClass.__dict__

{'a': 123, '__module__': '__main__', '__doc__': 'A simple example class'}

  • class.__doc__ : __doc__屬性傳回此類別的文件字串
  • class.__name__ : __name__屬性傳回此類別的名稱
  • class.__module__ : __module__屬性傳包含回此類別的文件字串
  • class.__bases__: __bases__屬性是一個tuple物件,傳回此類別的基底類別名稱

example1:

class myClass:
    "A simple example class"
    a=123

result: >>> myClass.__bases__

()

example2:

class myClass:
    "A simple example class"
    a=123


class a(myClass):
    "A Derived Class"
    b=321

result: >>> a.__bases__

(<class __main__.myClass at 0x011ED6C0>,)
Last modified 15 years ago Last modified on Oct 30, 2009, 10:41:12 AM