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from transformers import PretrainedConfig


class LightningConfig(PretrainedConfig):
    model_type = "lightning"

    def __init__(

        self,

        vocab_size=75000,

        d_model=256,

        nhead=4,

        num_layers=6,

        dropout=0.1,

        max_seq_len=200,

        **kwargs

    ):
        kwargs.setdefault("tie_word_embeddings", False)
        super().__init__(**kwargs)

        self.vocab_size = vocab_size
        self.d_model = d_model
        self.nhead = nhead
        self.num_layers = num_layers
        self.dropout = dropout
        self.max_seq_len = max_seq_len
        
        self.num_hidden_layers = num_layers
        self.num_attention_heads = nhead
        self.hidden_size = d_model