FM / pipelines

/usr/local/lib/python3.6/site-packages/transformers/pipelines/

/usr/local/lib/python3.6/site-packages/transformers/pipelines

Name	Size	Mode	Actions
__pycache__/	-	0755	rm
audio_classification.py	5840	0644	edit dl rm
audio_utils.py	7784	0644	edit dl rm
automatic_speech_recognition.py	18992	0644	edit dl rm
base.py	43958	0644	edit dl rm
conversational.py	13466	0644	edit dl rm
feature_extraction.py	3581	0644	edit dl rm
fill_mask.py	9870	0644	edit dl rm
image_classification.py	4325	0644	edit dl rm
image_segmentation.py	8045	0644	edit dl rm
object_detection.py	5304	0644	edit dl rm
pt_utils.py	11513	0644	edit dl rm
question_answering.py	26000	0644	edit dl rm
table_question_answering.py	18110	0644	edit dl rm
text2text_generation.py	15123	0644	edit dl rm
text_classification.py	7290	0644	edit dl rm
text_generation.py	12494	0644	edit dl rm
token_classification.py	20838	0644	edit dl rm
zero_shot_classification.py	10807	0644	edit dl rm
zero_shot_image_classification.py	5088	0644	edit dl rm
__init__.py	30359	0644	edit dl rm

Edit: /usr/local/lib/python3.6/site-packages/transformers/pipelines/fill_mask.py (9870B)

from typing import Dict

import numpy as np

from ..utils import add_end_docstrings, is_tf_available, is_torch_available, logging
from .base import PIPELINE_INIT_ARGS, GenericTensor, Pipeline, PipelineException

if is_tf_available():
    import tensorflow as tf

if is_torch_available():
    import torch

logger = logging.get_logger(__name__)

@add_end_docstrings(
    PIPELINE_INIT_ARGS,
    r"""
        top_k (`int`, defaults to 5):
            The number of predictions to return.
        targets (`str` or `List[str]`, *optional*):
            When passed, the model will limit the scores to the passed targets instead of looking up in the whole
            vocab. If the provided targets are not in the model vocab, they will be tokenized and the first resulting
            token will be used (with a warning, and that might be slower).

""",
)
class FillMaskPipeline(Pipeline):
    """
    Masked language modeling prediction pipeline using any `ModelWithLMHead`. See the [masked language modeling
    examples](../task_summary#masked-language-modeling) for more information.

This mask filling pipeline can currently be loaded from [`pipeline`] using the following task identifier:
    `"fill-mask"`.

The models that this pipeline can use are models that have been trained with a masked language modeling objective,
    which includes the bi-directional models in the library. See the up-to-date list of available models on
    [huggingface.co/models](https://huggingface.co/models?filter=fill-mask).

<Tip>

This pipeline only works for inputs with exactly one token masked. Experimental: We added support for multiple
    masks. The returned values are raw model output, and correspond to disjoint probabilities where one might expect
    joint probabilities (See [discussion](https://github.com/huggingface/transformers/pull/10222)).

</Tip>"""

def get_masked_index(self, input_ids: GenericTensor) -> np.ndarray:
        if self.framework == "tf":
            masked_index = tf.where(input_ids == self.tokenizer.mask_token_id).numpy()
        elif self.framework == "pt":
            masked_index = torch.nonzero(input_ids == self.tokenizer.mask_token_id, as_tuple=False)
        else:
            raise ValueError("Unsupported framework")
        return masked_index

def _ensure_exactly_one_mask_token(self, input_ids: GenericTensor) -> np.ndarray:
        masked_index = self.get_masked_index(input_ids)
        numel = np.prod(masked_index.shape)
        if numel < 1:
            raise PipelineException(
                "fill-mask",
                self.model.base_model_prefix,
                f"No mask_token ({self.tokenizer.mask_token}) found on the input",
            )

def ensure_exactly_one_mask_token(self, model_inputs: GenericTensor):
        if isinstance(model_inputs, list):
            for model_input in model_inputs:
                self._ensure_exactly_one_mask_token(model_input["input_ids"][0])
        else:
            for input_ids in model_inputs["input_ids"]:
                self._ensure_exactly_one_mask_token(input_ids)

def preprocess(self, inputs, return_tensors=None, **preprocess_parameters) -> Dict[str, GenericTensor]:
        if return_tensors is None:
            return_tensors = self.framework
        model_inputs = self.tokenizer(inputs, return_tensors=return_tensors)
        self.ensure_exactly_one_mask_token(model_inputs)
        return model_inputs

def _forward(self, model_inputs):
        model_outputs = self.model(**model_inputs)
        model_outputs["input_ids"] = model_inputs["input_ids"]
        return model_outputs

def postprocess(self, model_outputs, top_k=5, target_ids=None):
        # Cap top_k if there are targets
        if target_ids is not None and target_ids.shape[0] < top_k:
            top_k = target_ids.shape[0]
        input_ids = model_outputs["input_ids"][0]
        outputs = model_outputs["logits"]

if self.framework == "tf":
            masked_index = tf.where(input_ids == self.tokenizer.mask_token_id).numpy()[:, 0]

outputs = outputs.numpy()

logits = outputs[0, masked_index, :]
            probs = tf.nn.softmax(logits, axis=-1)
            if target_ids is not None:
                probs = tf.gather_nd(tf.squeeze(probs, 0), target_ids.reshape(-1, 1))
                probs = tf.expand_dims(probs, 0)

topk = tf.math.top_k(probs, k=top_k)
            values, predictions = topk.values.numpy(), topk.indices.numpy()
        else:
            masked_index = torch.nonzero(input_ids == self.tokenizer.mask_token_id, as_tuple=False).squeeze(-1)
            # Fill mask pipeline supports only one ${mask_token} per sample

logits = outputs[0, masked_index, :]
            probs = logits.softmax(dim=-1)
            if target_ids is not None:
                probs = probs[..., target_ids]

values, predictions = probs.topk(top_k)

result = []
        single_mask = values.shape[0] == 1
        for i, (_values, _predictions) in enumerate(zip(values.tolist(), predictions.tolist())):
            row = []
            for v, p in zip(_values, _predictions):
                # Copy is important since we're going to modify this array in place
                tokens = input_ids.numpy().copy()
                if target_ids is not None:
                    p = target_ids[p].tolist()

tokens[masked_index[i]] = p
                # Filter padding out:
                tokens = tokens[np.where(tokens != self.tokenizer.pad_token_id)]
                # Originally we skip special tokens to give readable output.
                # For multi masks though, the other [MASK] would be removed otherwise
                # making the output look odd, so we add them back
                sequence = self.tokenizer.decode(tokens, skip_special_tokens=single_mask)
                proposition = {"score": v, "token": p, "token_str": self.tokenizer.decode(p), "sequence": sequence}
                row.append(proposition)
            result.append(row)
        if single_mask:
            return result[0]
        return result

def get_target_ids(self, targets, top_k=None):
        if isinstance(targets, str):
            targets = [targets]
        try:
            vocab = self.tokenizer.get_vocab()
        except Exception:
            vocab = {}
        target_ids = []
        for target in targets:
            id_ = vocab.get(target, None)
            if id_ is None:
                input_ids = self.tokenizer(
                    target,
                    add_special_tokens=False,
                    return_attention_mask=False,
                    return_token_type_ids=False,
                    max_length=1,
                    truncation=True,
                )["input_ids"]
                if len(input_ids) == 0:
                    logger.warning(
                        f"The specified target token `{target}` does not exist in the model vocabulary. "
                        f"We cannot replace it with anything meaningful, ignoring it"
                    )
                    continue
                id_ = input_ids[0]
                # XXX: If users encounter this pass
                # it becomes pretty slow, so let's make sure
                # The warning enables them to fix the input to
                # get faster performance.
                logger.warning(
                    f"The specified target token `{target}` does not exist in the model vocabulary. "
                    f"Replacing with `{self.tokenizer.convert_ids_to_tokens(id_)}`."
                )
            target_ids.append(id_)
        target_ids = list(set(target_ids))
        if len(target_ids) == 0:
            raise ValueError("At least one target must be provided when passed.")
        target_ids = np.array(target_ids)
        return target_ids

def _sanitize_parameters(self, top_k=None, targets=None):
        postprocess_params = {}

if targets is not None:
            target_ids = self.get_target_ids(targets, top_k)
            postprocess_params["target_ids"] = target_ids

if top_k is not None:
            postprocess_params["top_k"] = top_k

if self.tokenizer.mask_token_id is None:
            raise PipelineException(
                "fill-mask", self.model.base_model_prefix, "The tokenizer does not define a `mask_token`."
            )
        return {}, {}, postprocess_params

def __call__(self, inputs, *args, **kwargs):
        """
        Fill the masked token in the text(s) given as inputs.

Args:
            args (`str` or `List[str]`):
                One or several texts (or one list of prompts) with masked tokens.
            targets (`str` or `List[str]`, *optional*):
                When passed, the model will limit the scores to the passed targets instead of looking up in the whole
                vocab. If the provided targets are not in the model vocab, they will be tokenized and the first
                resulting token will be used (with a warning, and that might be slower).
            top_k (`int`, *optional*):
                When passed, overrides the number of predictions to return.

Return:
            A list or a list of list of `dict`: Each result comes as list of dictionaries with the following keys:

- **sequence** (`str`) -- The corresponding input with the mask token prediction.
            - **score** (`float`) -- The corresponding probability.
            - **token** (`int`) -- The predicted token id (to replace the masked one).
            - **token** (`str`) -- The predicted token (to replace the masked one).
        """
        outputs = super().__call__(inputs, **kwargs)
        if isinstance(inputs, list) and len(inputs) == 1:
            return outputs[0]
        return outputs

cmd: