= Python Note =

== Object and Class ==

=== constructor ===

'''物件建立時，物件本身所執行的函式'''

example:
{{{
#!python
class myClass:
    def __init__(self):
        print self
}}}

result: >>> myClass
{{{
#!text
<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:
{{{ 
#!python
class myClass:
 "A simple example class"
 a=123
}}}
  
result: >>> myClass.!__dict!__
{{{
#!text
{'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:
{{{
#!python
class myClass:
    "A simple example class"
    a=123
}}}

result: >>> myClass.!__bases!__
{{{
#!text
()
}}}
example2:
{{{
#!python
class myClass:
    "A simple example class"
    a=123


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

result: >>> a.!__bases!__
{{{
#!text
(<class __main__.myClass at 0x011ED6C0>,)
}}}