python 超类初始化参数

Question

我遇到了如何为超级 class 初始化编写参数的问题。 class App1 需要从其他两个 class 继承。我在 class App1 处初始化了基 classes 中的所有参数，但错误提示我有太多参数。我想知道为什么？基本上，我将基 classes 中的所有参数都放在 super init 中。 3个class写成多个windows，一个Button命令class一个接一个跳转。所以我称 main() 为 myApp = Welcome(root, csv_name_ses, csv_name_sub).

感谢您的帮助！

class question(object): #first window
     def __init__(self, algorithmIndex, initX, mid_loss_list = None, mid_gain_list = None):
          self.initX = initX
          self.algorithmIndex = algorithmIndex
          self.mid_gain_list = question.mid_gain_list
          self.mid_loss_list = question.mid_loss_list
          ...

class Welcome(object): #second window
      def __init__(self, master, csv_name_ses, csv_name_sub):
          self.master = master
          Welcome.csv_name_sub = str(self.entrySub.get())
          Welcome.csv_name_ses = str(self.entrySes.get())
          ...

class App1(Welcome, question): #third, last one appears
      def __init__(self, master, csv_name_ses, csv_name_sub, algorithmIndex, initX, mid_loss_list, mid_gain_list):
          super(App1, self).__init__(master, csv_name_ses, csv_name_sub, algorithmIndex, initX, mid_loss_list, mid_gain_list)
          ...    

def main():

   root = Tk()
   myApp = Welcome(root, csv_name_ses, csv_name_sub)
   root.mainloop()

错误消息：

super(App1, self).__init__(master, csv_name_ses, csv_name_sub, algorithmIndex, initX, mid_loss_list, mid_gain_list)
TypeError: __init__() takes 4 positional arguments but 8 were given

Answer 1

你的 Welcome 和 question class 没有写成合作超级classes。如果你想使用 super(..)，你需要重写他们的 __init__ 方法来接受任意数量的参数，并且他们需要再次调用 super(..).__init__ 并使用所有尚未使用的参数。

但对于您的情况，显式调用 superclass 初始值设定项可能更容易：

class Appl(Welcome, question):
    def __init__(self, master, csv_name_ses, csv_name_sub, algorithmIndex, initX, mid_loss_list, mid_gain_list):
        Welcome.__init__(self, master, csv_name_ses, csv_name_sub)
        question.__init__(self, algorithmIndex, initX, mid_loss_list, mid_gain_list)

Answer 2

你应该这样调用：

class App1(Welcome, question): #third, last one appears
  def __init__(self, master, csv_name_ses, csv_name_sub):
      Welcome.__init__(master, csv_name_ses, csv_name_sub, algorithmIndex, initX, mid_loss_list, mid_gain_list)
      question.__init__(algorithmIndex, initX, mid_loss_list, mid_gain_list)
      ...

python 超类初始化参数

python superclass initialization arguments

python

arguments

initialization

superclass