src/transformers/models/openai/modeling_openai.py/OpenAIGPTDoubleHeadsModel/__init__
class OpenAIGPTDoubleHeadsModel:    def __init__(self, config):
        super().__init__(config)

        config.num_labels = 1
        self.transformer = OpenAIGPTModel(config)
        self.lm_head = nn.Linear(config.n_embd, config.vocab_size, bias=False)
        self.multiple_choice_head = SequenceSummary(config)

        # Initialize weights and apply final processing
        self.post_init()