ΘΕΜΑ: Ερώτηση σχετικά με τις κλάσεις

class my_data():
   def __init__(self,data1,data2,data3):
      self.data1 = data1
      self.data2 = data2
      self.data3 = data3

d1 = my_data(1,2,3)
d2 = my_data(4,5,d1)
d3 = my_data(7,8,d2)

d2 = my_data(4,5,d1)
d1 = my_data(1,2,3)
d3 = my_data(7,8,d2)

d2 = my_data(4,5,d1)

d1 = my_data(None,None,None)

class my_data():
   def __init__(self,data1,data2,data3):
      self.data1 = data1
      self.data2 = data2
      try:
         self.data3 = data3
      except:
         data3 = my_data(None,None,None)
	 self.data3 = data3

d2 = my_data(4,5)

class my_data():
   def __init__(self,data1,data2,data3=None):
      self.data1 = data1
      self.data2 = data2
      if data3 is not None:
        self.data3 = data3
      else:
        self.data3 = my_data(1, 2, 3)

data1, data2, parent

Μήκος, Παροχή, Αγωγός που προηγείται

d1 = my_data(None,None,None)

my_data.my_list()

[d1, d2, d3, ...]

class MyClass(object):
    my_list = []
    def __init__(self,data1, data2, data3=None):
        self.data1 = data1
        self.data2 = data2
        if data3 is not None:
            self.data3 = data3
        else:
            self.data3 = temp = MyClass(1, 2, 3)
            self.my_list.append(temp)
        self.my_list.append(self)