Skip to content

Deita

DeitaFiltering

Bases: GlobalStep

Filter the dataset based on the DEITA score and the cosine distance between the embeddings. It's an implementation of the filtering step from the paper 'What Makes Good Data for Alignment? A Comprehensive Study of Automatic Data Selection in Instruction Tuning'.

Attributes:

Name Type Description
data_budget RuntimeParameter[int]

The desired size of the dataset after filtering.
diversity_threshold RuntimeParameter[float]

If a row has a cosine distance with respect to it's nearest neighbor greater than this value, it will be included in the filtered dataset. Defaults to 0.9.
normalize_embeddings RuntimeParameter[bool]

Whether to normalize the embeddings before computing the cosine distance. Defaults to True.
Runtime parameters
  • data_budget: The desired size of the dataset after filtering.
  • diversity_threshold: If a row has a cosine distance with respect to it's nearest neighbor greater than this value, it will be included in the filtered dataset.
Input columns
  • evol_instruction_score (float): The score of the instruction generated by ComplexityScorer step.
  • evol_response_score (float): The score of the response generated by QualityScorer step.
  • embedding (List[float]): The embedding generated for the conversation of the instruction-response pair using GenerateEmbeddings step.
Output columns
  • deita_score (float): The DEITA score for the instruction-response pair.
  • deita_score_computed_with (List[str]): The scores used to compute the DEITA score.
  • nearest_neighbor_distance (float): The cosine distance between the embeddings of the instruction-response pair.
References
Source code in src/distilabel/steps/deita.py 
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
class DeitaFiltering(GlobalStep):
    """Filter the dataset based on the DEITA score and the cosine distance between the embeddings.
    It's an implementation of the filtering step from the paper 'What Makes Good Data
    for Alignment? A Comprehensive Study of Automatic Data Selection in Instruction Tuning'.

    Attributes:
        data_budget: The desired size of the dataset after filtering.
        diversity_threshold: If a row has a cosine distance with respect to it's nearest
            neighbor greater than this value, it will be included in the filtered dataset.
            Defaults to `0.9`.
        normalize_embeddings: Whether to normalize the embeddings before computing the cosine
            distance. Defaults to `True`.

    Runtime parameters:
        - `data_budget`: The desired size of the dataset after filtering.
        - `diversity_threshold`: If a row has a cosine distance with respect to it's nearest
            neighbor greater than this value, it will be included in the filtered dataset.

    Input columns:
        - evol_instruction_score (`float`): The score of the instruction generated by
            `ComplexityScorer` step.
        - evol_response_score (`float`): The score of the response generated by
            `QualityScorer` step.
        - embedding (`List[float]`): The embedding generated for the conversation of the
            instruction-response pair using `GenerateEmbeddings` step.

    Output columns:
        - deita_score (`float`): The DEITA score for the instruction-response pair.
        - deita_score_computed_with (`List[str]`): The scores used to compute the DEITA
            score.
        - nearest_neighbor_distance (`float`): The cosine distance between the embeddings
            of the instruction-response pair.

    References:
        - [`What Makes Good Data for Alignment? A Comprehensive Study of Automatic Data Selection in Instruction Tuning`](https://arxiv.org/abs/2312.15685)
    """

    data_budget: RuntimeParameter[int] = Field(
        default=None, description="The desired size of the dataset after filtering."
    )
    diversity_threshold: RuntimeParameter[float] = Field(
        default=0.9,
        description="If a row has a cosine distance with respect to it's nearest neighbor"
        " greater than this value, it will be included in the filtered dataset.",
    )
    normalize_embeddings: RuntimeParameter[bool] = Field(
        default=True,
        description="Whether to normalize the embeddings before computing the cosine distance.",
    )
    distance_metric: RuntimeParameter[Literal["cosine", "manhattan"]] = Field(
        default="cosine",
        description="The distance metric to use. Currently only 'cosine' is supported.",
    )

    @property
    def inputs(self) -> List[str]:
        return ["evol_instruction_score", "evol_response_score", "embedding"]

    @property
    def outputs(self) -> List[str]:
        return ["deita_score", "nearest_neighbor_distance", "deita_score_computed_with"]

    def process(self, inputs: StepInput) -> "StepOutput":  # type: ignore
        """Filter the dataset based on the DEITA score and the cosine distance between the
        embeddings.

        Args:
            inputs: The input data.

        Returns:
            The filtered dataset.
        """
        inputs = self._compute_deita_score(inputs)
        inputs = self._compute_nearest_neighbor(inputs)
        inputs.sort(key=lambda x: x["deita_score"], reverse=True)

        selected_rows = []
        for input in inputs:
            if len(selected_rows) >= self.data_budget:  # type: ignore
                break
            if input["nearest_neighbor_distance"] >= self.diversity_threshold:
                selected_rows.append(input)
        yield selected_rows

    def _compute_deita_score(self, inputs: StepInput) -> StepInput:
        """Computes the DEITA score for each instruction-response pair. The DEITA score is
        the product of the instruction score and the response score.

        Args:
            inputs: The input data.

        Returns:
            The input data with the DEITA score computed.
        """
        for input_ in inputs:
            evol_instruction_score = input_.get("evol_instruction_score")
            evol_response_score = input_.get("evol_response_score")

            if evol_instruction_score and evol_response_score:
                deita_score = evol_instruction_score * evol_response_score
                score_computed_with = ["evol_instruction_score", "evol_response_score"]
            elif evol_instruction_score:
                self._logger.warning(
                    "Response score is missing for the instruction-response pair. Using"
                    " instruction score as DEITA score."
                )
                deita_score = evol_instruction_score
                score_computed_with = ["evol_instruction_score"]
            elif evol_response_score:
                self._logger.warning(
                    "Instruction score is missing for the instruction-response pair. Using"
                    " response score as DEITA score."
                )
                deita_score = evol_response_score
                score_computed_with = ["evol_response_score"]
            else:
                self._logger.warning(
                    "Instruction and response scores are missing for the instruction-response"
                    " pair. Setting DEITA score to 0."
                )
                deita_score = 0
                score_computed_with = []

            input_.update(
                {
                    "deita_score": deita_score,
                    "deita_score_computed_with": score_computed_with,
                }
            )
        return inputs

    def _compute_nearest_neighbor(self, inputs: StepInput) -> StepInput:
        """Computes the cosine distance between the embeddings of the instruction-response
        pairs and the nearest neighbor.

        Args:
            inputs: The input data.

        Returns:
            The input data with the cosine distance computed.
        """
        embeddings = np.array([input["embedding"] for input in inputs])
        if self.normalize_embeddings:
            embeddings = self._normalize_embeddings(embeddings)
        self._logger.info("📏 Computing nearest neighbor distance...")

        if self.distance_metric == "cosine":
            self._logger.info("📏 Using cosine distance.")
            distances = self._cosine_distance(embeddings)
        else:
            self._logger.info("📏 Using manhattan distance.")
            distances = self._manhattan_distance(embeddings)

        for distance, input in zip(distances, inputs):
            input["nearest_neighbor_distance"] = distance
        return inputs

    def _normalize_embeddings(self, embeddings: np.ndarray) -> np.ndarray:
        """Normalize the embeddings.

        Args:
            embeddings: The embeddings to normalize.

        Returns:
            The normalized embeddings.
        """
        self._logger.info("⚖️ Normalizing embeddings...")
        norms = np.linalg.norm(embeddings, axis=1, keepdims=True)
        return embeddings / norms

    def _cosine_distance(self, embeddings: np.array) -> np.array:  # type: ignore
        """Computes the cosine distance between the embeddings.

        Args:
            embeddings: The embeddings.

        Returns:
            The cosine distance between the embeddings.
        """
        cosine_similarity = np.dot(embeddings, embeddings.T)
        cosine_distance = 1 - cosine_similarity
        # Ignore self-distance
        np.fill_diagonal(cosine_distance, np.inf)
        return np.min(cosine_distance, axis=1)

    def _manhattan_distance(self, embeddings: np.array) -> np.array:  # type: ignore
        """Computes the manhattan distance between the embeddings.

        Args:
            embeddings: The embeddings.

        Returns:
            The manhattan distance between the embeddings.
        """
        manhattan_distance = np.abs(embeddings[:, None] - embeddings).sum(-1)
        # Ignore self-distance
        np.fill_diagonal(manhattan_distance, np.inf)
        return np.min(manhattan_distance, axis=1)

process(inputs)

Filter the dataset based on the DEITA score and the cosine distance between the embeddings.

Parameters:

Name Type Description Default
inputs StepInput

The input data.

 required

Returns:

Type Description
StepOutput

The filtered dataset.
Source code in src/distilabel/steps/deita.py 
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
def process(self, inputs: StepInput) -> "StepOutput":  # type: ignore
    """Filter the dataset based on the DEITA score and the cosine distance between the
    embeddings.

    Args:
        inputs: The input data.

    Returns:
        The filtered dataset.
    """
    inputs = self._compute_deita_score(inputs)
    inputs = self._compute_nearest_neighbor(inputs)
    inputs.sort(key=lambda x: x["deita_score"], reverse=True)

    selected_rows = []
    for input in inputs:
        if len(selected_rows) >= self.data_budget:  # type: ignore
            break
        if input["nearest_neighbor_distance"] >= self.diversity_threshold:
            selected_rows.append(input)
    yield selected_rows