为python中的丢失变量创建类

Question

我想创建类以找到缺失的值，但以下是我的错误，我该如何解决该帮助？

     import pandas as pd
     data={'product':['A','B','C','D'],'sales':[100,None,256,100]}
     data=pd.DataFrame(data=data)

     class Information():
         def __init__(self):
            print('information object created')

         def get_missing_values(self):
            missing_values=data.isnull().sum()
            return missing_values

      class Ml:
            def __init__(self,data):
              print('DataPrep created') 
              self.data=data 
              self._info=Information()

     Ml=Ml(data)
    
    Ml.Information()

Answer 1

您可以做这样的事情。

 import pandas as pd
 data = {'product':['A','B','C','D'],'sales':[100,None,256,100]}
 data = pd.DataFrame(data=data)

 class Information():
     def __init__(self, data):
         print('information object created')
         self.data = data
     def get_missing_values(self):
         missing_values = self.data.isnull().sum()
         return missing_values

 class Ml:
     def __init__(self,data):
         print('DataPrep created') 
         self.data = data 
         self.info = Information(data)

  ml = Ml(data)

  print(ml.info.get_missing_values())