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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def load(self, file=None):
        "Read and decompress a compact script from the Pickler's file object."
        if file is None:
            file = self._file
        script_class = self.get_script_class()
        script = self._load(file, self._protocol, self._version)
        return script_class(script)