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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_fasttext_format(cls, path, ctx=cpu(), **kwargs):
 """Create an instance of the class and load weights. Load the weights from the fastText binary format created by https://github.com/facebookresearch/fastText Parameters path : str Path to the .bin model file. ctx : mx.Context, default mx.cpu() Context to initialize the weights on. kwargs : dict Keyword arguments are passed to the class initializer. """

        with open(path, 'rb') as f:
            new_format, dim, bucket, minn, maxn, = cls._read_model_params(f)
            idx_to_token = cls._read_vocab(f, new_format)
            dim, matrix = cls._read_vectors(f, new_format, bucket,
                                            len(idx_to_token))

        token_to_idx = {token: idx for idx, token in enumerate(idx_to_token)}
        if len(token_to_idx) != len(idx_to_token):
            # If multiple tokens with invalid encoding were collapsed in a
            # single token due to replacement of invalid bytes with Unicode
            # replacement character
            warnings.warn(
                'There are duplicate tokens in the embedding file. '
                'This is likely due to decoding errors for some tokens, '
                'where invalid bytes were replaced by '
                'the Unicode replacement character. '
                'This affects {} tokens.'.format(
                    len(idx_to_token) - len(token_to_idx)))
            for _ in range(len(token_to_idx), len(idx_to_token)):
                # Add pseudo tokens to make sure length is the same
                token_to_idx[object()] = -1
        assert len(token_to_idx) == len(idx_to_token)

        subword_function = create_subword_function(
            'NGramHashes', num_subwords=matrix.shape[0] - len(idx_to_token),
            ngrams=list(range(minn, maxn + 1)), special_tokens={'</s>'})

        self = cls(token_to_idx, subword_function, output_dim=dim, **kwargs)

        self.initialize(ctx=ctx)
        self.weight.set_data(nd.array(matrix))

        return self