import pickle


class Dataset(list):

    def __init__(self, file):
        super().__init__()
        if file is not None:
            file = open(file, 'rb')
            data = pickle.load(file)
            self.extend(data)

4c63c2351d385d084517755e4bcb2c7bae97cb21
<mask token>

<mask token>


class Dataset(list):
    <mask token>

<mask token>


class Dataset(list):

    def __init__(self, file):
        super().__init__()
        if file is not None:
            file = open(file, 'rb')
            data = pickle.load(file)
            self.extend(data)

import pickle


class Dataset(list):

    def __init__(self, file):
        super().__init__()
        if file is not None:
            file = open(file, 'rb')
            data = pickle.load(file)
            self.extend(data)
