Is there a simpler way to pass variables from the outer class to an inner class?-CodePudding

If I have the below class, is there a way to pass a variable that was defined in the outer class __init__ constructor into the inner class constructor in the inner class?

class Outer:

     def __init__(self, df):
        self.df = df

     class Inner:
          ## Looking to pass the df into this class

I stumbled across this solution but I wanted to know if there was a simpler solution?

I also came across this solution but with this, I'd have to insert the df when calling the inner class. Is there a way to avoid this whereby if its initialised in the outer class, I can automatically retrieve it when I call the inner class or is this unavoidable?

CodePudding user response：

You don't have an inner object until you create one, at which point you can pass any attributes of the outer class:

class Outer:
     def __init__(self, df):
        self.df = df
        self._inner = self.Inner(self.df)

     class Inner:
         def __init__(self, parent_df):
            self.parent_df = parent_df

Also see Is it good practice to nest classes?

CodePudding user response：

class Outer:

    def __init__(self, df):
        self.df = df

    class Inner(Outer):
        pass

Inner will now inherit Outer's properties and methods