CODEWITHSUNDEEP
pythonclass
Jojo
Jojo

Reputation: 1117

TypeError when creating SubClass

I have a parents class defined as:

class Alpha(X, Y, metaclass=abc.ABCMeta):

    def __init__(self, time_series : pandas.Series):
        super(Alpha, self).__init__()

And I have its Child Class:

class Beta(Alpha):
    def __init__(self, returns: [daily_returns_object]):
        super(Beta, self).__init__()
        self.calibrate(returns)

I try to create a Beta Object according to:

#returns_list has been defined but is irrelevant here
beta_obj = Beta(returns_list)

I get the error TypeError:__init__() missing one positional argument: 'time_series'. Hence, I wrote beta_obj = Beta(time_series, returns_list) but then get the error TypeError:__init__() takes 2 positional arguments but 3 were given.

Upvotes: 0

Views: 133

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1122092

You are calling the Alpha.__init__ method here:

super(Beta, self).__init__()

but you are not passing in the required time_series argument there.

If that's an argument that Beta takes too, you'll need to add it to your Beta.__init__ definition, then pass it on:

class Beta(Alpha):
    def __init__(self, time_series: pandas.Series, returns: [daily_returns_object]):
        super(Beta, self).__init__(time_series)
        self.calibrate(returns)

Upvotes: 1

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