[Dynamic Language] Python: 类基本结构和继承

 #! /usr/bin/env python
  2 # _*_ coding:utf-8 _*_
  3
  4 class Base1:
  5
  6     #私有类型成员(这只是一种规则，并不是从编译器上面限制的，
　　　　　#我们依然可以用特殊语法调用这些私有成员：
　　　　　#类型名称+.+_类型名称+字段名称 如:Base1._Base1__i)
  7     __i = 123
  8
  9     a = 123 #Class Field
 10
 11     #初始化函数
 12     def __init__(self):
 13         self.b = 321 #Instance Field
 14         self.x = ["a","b","e","e","n"]
 15         self.test()
 16         print "Base1 init ..."
 17
 18     def test(self):
 19         print "Base1 test ..."
 20
 21     #加"__"私有成员(特殊方法调用: Base1()._Base1__name())
 22     def __name(self):
 23         print "pirvatedata..."
 24
 25     #静态方法
 26     @staticmethod
 27     def staticMethod():
 28         print "staticMethod..."
 29
 30     #属性
 31     def getI(self): return self.__b
 32     def setI(self, value):  self.__b = value
 33     def delI(self): del self.__b
 34     I = property(getI, setI, delI, "property I")
 35
 36     #只读属性
 37     @property
 38     def I(self):
 39         return self.__i
 40
 41     #实际索引器功能
 42     def __getitem__(self, key):
 43         return self.x[key]
 44     def __setitem__(self, key, value):
 45         self.x[key] = value
 46
 47
 48     def myTest():
 49         try:
 50             print "mytest..."
 51         except RuntimeError, e:
 52             print "[RuntimeError]", e
 53         except Exception, e:
 54             print "[Error]", e
 55         finally:
 56             print "finally"
 57
 58
 59     #析构函数
 60     def __del__(self):
 61         pass
 

#-------------------------------------------------------
 63 class Base2:
 64     def __init__(self):
 65         print "Base2 init ..."
 66
 67     def test(self):
 68         print "Base2 test ..."
 69
 70 #-------------------------------------------------------
 71 class Class1(Base1, Base2):
 72     def __init__(self):
 73         #基类__init__/__del__需要显示调用
 74         Base1.__init__(self)
 75         Base2.__init__(self)
 76         print "Class1 init ..."
 77
 78 #-------------------------------------------------------
 79 if __name__ == "__main__":
 80     a = Class1()
 81     #继承方法的调用和基类声明顺序有关
 82     a.test()