pythonでのクラスの作成、親子クラスの継承

#!/usr/bin/python

class Ppoint:
   def __init__(self, x, y):
      self.x = x
      self.y = y

   # def __del__(self):
   #    class_name = self.__class__.__name__
   #    print class_name, "destroyed"


class Spring_Point(Ppoint):
    def __init__(self):
        Ppoint.__init__(self, 1, 2)
        # super(Spring_Point, self).__init__(1, 2)

if __name__ == "__main__":
    xx = Spring_Point()
    print xx.__dict__

以上、oldでclass,Ppoint,class Spring_を作成しました.Point Spring_の継承Point親クラスのコンストラクション関数を呼び出す場合は、

Ppoint.__init__(self, 1, 2)

使用不可

super(Spring_Point, self).__init__(1, 2)

心得を使用してクラスを作成する場合

#!/usr/bin/python

class Ppoint(object):
   def __init__(self, x, y):
      self.x = x
      self.y = y

   # def __del__(self):
   #    class_name = self.__class__.__name__
   #    print class_name, "destroyed"


class Spring_Point(Ppoint):
    def __init__(self):
        Ppoint.__init__(self, 1, 2)
        # super(Spring_Point, self).__init__(1, 2)

if __name__ == "__main__":
    xx = Spring_Point()
    print xx.__dict__

親コンストラクタを呼び出す方法の2つを参照してください.http://stackoverflow.com/questions/9698614/super-raises-typeerror-must-be-type-not-classobj-for-new-style-class

In short, they are equivalent. Let's have a history view:

(1) at first, the function looks like this.

    class MySubClass(MySuperClass):
        def __init__(self):
            MySuperClass.__init__(self)

(2) to make code more abstract (and more portable). A common method to get Super-Class is invented like:

    super(<class>, <instance>)

And init function can be:

    class MySubClassBetter(MySuperClass):
        def __init__(self):
            super(MySubClassBetter, self).__init__()

However requiring an explicit passing of both the class and instance break the DRY (Don't Repeat Yourself) rule a bit.

(3) in V3. It is more smart,

    super()