import torch
from typing import Tuple


def dummy_attention(key: torch.Tensor,
                    query: torch.Tensor,
                    value: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
    """
    Create a dummy tensor which have the same inputs and outputs to nn.MultiHeadAttention().__call__()
    
    Args:
        key (T): inputs to be passed as output
        query (T): dummy inputs
        value (T): dummy inputs
    
    Returns:
        Tuple[T, T]: values = (key, dummy outputs = torch.Tensor([]))
    """
    return key, torch.Tensor([])