# coding=utf-8
# Copyright 2022 The HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Processing saving/loading class for common processors.
"""
import copy
import inspect
import json
import os
import sys
import typing
import warnings
from pathlib import Path
from typing import Any, Dict, List, Optional, Tuple, TypedDict, Union
import numpy as np
import typing_extensions
from .dynamic_module_utils import custom_object_save
from .image_utils import ChannelDimension, is_valid_image, is_vision_available
if is_vision_available():
from .image_utils import PILImageResampling
from .tokenization_utils_base import (
PaddingStrategy,
PreTokenizedInput,
PreTrainedTokenizerBase,
TextInput,
TruncationStrategy,
)
from .utils import (
PROCESSOR_NAME,
PushToHubMixin,
TensorType,
add_model_info_to_auto_map,
add_model_info_to_custom_pipelines,
cached_file,
copy_func,
direct_transformers_import,
download_url,
is_offline_mode,
is_remote_url,
logging,
)
logger = logging.get_logger(__name__)
# Dynamically import the Transformers module to grab the attribute classes of the processor form their names.
transformers_module = direct_transformers_import(Path(__file__).parent)
AUTO_TO_BASE_CLASS_MAPPING = {
"AutoTokenizer": "PreTrainedTokenizerBase",
"AutoFeatureExtractor": "FeatureExtractionMixin",
"AutoImageProcessor": "ImageProcessingMixin",
}
if sys.version_info >= (3, 11):
Unpack = typing.Unpack
else:
Unpack = typing_extensions.Unpack
class TextKwargs(TypedDict, total=False):
"""
Keyword arguments for text processing. For extended documentation, check out tokenization_utils_base methods and
docstrings associated.
Attributes:
add_special_tokens (`bool`, *optional*)
Whether or not to add special tokens when encoding the sequences.
padding (`bool`, `str` or [`~utils.PaddingStrategy`], *optional*)
Activates and controls padding.
truncation (`bool`, `str` or [`~tokenization_utils_base.TruncationStrategy`], *optional*):
Activates and controls truncation.
max_length (`int`, *optional*):
Controls the maximum length to use by one of the truncation/padding parameters.
stride (`int`, *optional*):
If set, the overflowing tokens will contain some tokens from the end of the truncated sequence.
is_split_into_words (`bool`, *optional*):
Whether or not the input is already pre-tokenized.
pad_to_multiple_of (`int`, *optional*):
If set, will pad the sequence to a multiple of the provided value.
return_token_type_ids (`bool`, *optional*):
Whether to return token type IDs.
return_attention_mask (`bool`, *optional*):
Whether to return the attention mask.
return_overflowing_tokens (`bool`, *optional*):
Whether or not to return overflowing token sequences.
return_special_tokens_mask (`bool`, *optional*):
Whether or not to return special tokens mask information.
return_offsets_mapping (`bool`, *optional*):
Whether or not to return `(char_start, char_end)` for each token.
return_length (`bool`, *optional*):
Whether or not to return the lengths of the encoded inputs.
verbose (`bool`, *optional*):
Whether or not to print more information and warnings.
padding_side (`str`, *optional*):
The side on which padding will be applied.
"""
text_pair: Optional[Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]]]
text_target: Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]]
text_pair_target: Optional[Union[TextInput, PreTokenizedInput, List[TextInput], List[PreTokenizedInput]]]
add_special_tokens: Optional[bool]
padding: Union[bool, str, PaddingStrategy]
truncation: Union[bool, str, TruncationStrategy]
max_length: Optional[int]
stride: Optional[int]
is_split_into_words: Optional[bool]
pad_to_multiple_of: Optional[int]
return_token_type_ids: Optional[bool]
return_attention_mask: Optional[bool]
return_overflowing_tokens: Optional[bool]
return_special_tokens_mask: Optional[bool]
return_offsets_mapping: Optional[bool]
return_length: Optional[bool]
verbose: Optional[bool]
padding_side: Optional[str]
class ImagesKwargs(TypedDict, total=False):
"""
Keyword arguments for image processing. For extended documentation, check the appropriate ImageProcessor
class methods and docstrings.
Attributes:
do_resize (`bool`, *optional*):
Whether to resize the image.
size (`Dict[str, int]`, *optional*):
Resize the shorter side of the input to `size["shortest_edge"]`.
size_divisor (`int`, *optional*):
The size by which to make sure both the height and width can be divided.
crop_size (`Dict[str, int]`, *optional*):
Desired output size when applying center-cropping.
resample (`PILImageResampling`, *optional*):
Resampling filter to use if resizing the image.
do_rescale (`bool`, *optional*):
Whether to rescale the image by the specified scale `rescale_factor`.
rescale_factor (`int` or `float`, *optional*):
Scale factor to use if rescaling the image.
do_normalize (`bool`, *optional*):
Whether to normalize the image.
image_mean (`float` or `List[float]`, *optional*):
Mean to use if normalizing the image.
image_std (`float` or `List[float]`, *optional*):
Standard deviation to use if normalizing the image.
do_pad (`bool`, *optional*):
Whether to pad the image to the `(max_height, max_width)` of the images in the batch.
pad_size (`Dict[str, int]`, *optional*):
The size `{"height": int, "width" int}` to pad the images to.
do_center_crop (`bool`, *optional*):
Whether to center crop the image.
data_format (`ChannelDimension` or `str`, *optional*):
The channel dimension format for the output image.
input_data_format (`ChannelDimension` or `str`, *optional*):
The channel dimension format for the input image.
"""
do_resize: Optional[bool]
size: Optional[Dict[str, int]]
size_divisor: Optional[int]
crop_size: Optional[Dict[str, int]]
resample: Optional[Union["PILImageResampling", int]]
do_rescale: Optional[bool]
rescale_factor: Optional[float]
do_normalize: Optional[bool]
image_mean: Optional[Union[float, List[float]]]
image_std: Optional[Union[float, List[float]]]
do_pad: Optional[bool]
pad_size: Optional[Dict[str, int]]
do_center_crop: Optional[bool]
data_format: Optional[ChannelDimension]
input_data_format: Optional[Union[str, ChannelDimension]]
class VideosKwargs(TypedDict, total=False):
"""
Keyword arguments for video processing.
Attributes:
do_resize (`bool`):
Whether to resize the image.
size (`Dict[str, int]`, *optional*):
Resize the shorter side of the input to `size["shortest_edge"]`.
size_divisor (`int`, *optional*):
The size by which to make sure both the height and width can be divided.
resample (`PILImageResampling`, *optional*):
Resampling filter to use if resizing the image.
do_rescale (`bool`, *optional*):
Whether to rescale the image by the specified scale `rescale_factor`.
rescale_factor (`int` or `float`, *optional*):
Scale factor to use if rescaling the image.
do_normalize (`bool`, *optional*):
Whether to normalize the image.
image_mean (`float` or `List[float]`, *optional*):
Mean to use if normalizing the image.
image_std (`float` or `List[float]`, *optional*):
Standard deviation to use if normalizing the image.
do_pad (`bool`, *optional*):
Whether to pad the image to the `(max_height, max_width)` of the images in the batch.
do_center_crop (`bool`, *optional*):
Whether to center crop the image.
data_format (`ChannelDimension` or `str`, *optional*):
The channel dimension format for the output image.
input_data_format (`ChannelDimension` or `str`, *optional*):
The channel dimension format for the input image.
"""
do_resize: Optional[bool]
size: Optional[Dict[str, int]]
size_divisor: Optional[int]
resample: Optional["PILImageResampling"]
do_rescale: Optional[bool]
rescale_factor: Optional[float]
do_normalize: Optional[bool]
image_mean: Optional[Union[float, List[float]]]
image_std: Optional[Union[float, List[float]]]
do_pad: Optional[bool]
do_center_crop: Optional[bool]
data_format: Optional[ChannelDimension]
input_data_format: Optional[Union[str, ChannelDimension]]
class AudioKwargs(TypedDict, total=False):
"""
Keyword arguments for audio processing.
Attributes:
sampling_rate (`int`, *optional*):
The sampling rate at which the `raw_speech` input was sampled.
raw_speech (`np.ndarray`, `List[float]`, `List[np.ndarray]`, `List[List[float]]`):
The sequence or batch of sequences to be padded. Each sequence can be a numpy array, a list of float
values, a list of numpy arrays or a list of list of float values. Must be mono channel audio, not
stereo, i.e. single float per timestep.
padding (`bool`, `str` or [`~utils.PaddingStrategy`], *optional*):
Select a strategy to pad the returned sequences (according to the model's padding side and padding
index) among:
- `True` or `'longest'`: Pad to the longest sequence in the batch (or no padding if only a single
sequence if provided).
- `'max_length'`: Pad to a maximum length specified with the argument `max_length` or to the maximum
acceptable input length for the model if that argument is not provided.
- `False` or `'do_not_pad'`
max_length (`int`, *optional*):
Maximum length of the returned list and optionally padding length (see above).
truncation (`bool`, *optional*):
Activates truncation to cut input sequences longer than *max_length* to *max_length*.
pad_to_multiple_of (`int`, *optional*):
If set, will pad the sequence to a multiple of the provided value.
return_attention_mask (`bool`, *optional*):
Whether or not [`~ASTFeatureExtractor.__call__`] should return `attention_mask`.
"""
sampling_rate: Optional[int]
raw_speech: Optional[Union["np.ndarray", List[float], List["np.ndarray"], List[List[float]]]]
padding: Optional[Union[bool, str, PaddingStrategy]]
max_length: Optional[int]
truncation: Optional[bool]
pad_to_multiple_of: Optional[int]
return_attention_mask: Optional[bool]
class CommonKwargs(TypedDict, total=False):
return_tensors: Optional[Union[str, TensorType]]
class ProcessingKwargs(TextKwargs, ImagesKwargs, VideosKwargs, AudioKwargs, CommonKwargs, total=False):
"""
Base class for kwargs passing to processors.
A model should have its own `ModelProcessorKwargs` class that inherits from `ProcessingKwargs` to provide:
1) Additional typed keys and that this model requires to process inputs.
2) Default values for existing keys under a `_defaults` attribute.
New keys have to be defined as follows to ensure type hinting is done correctly.
```python
# adding a new image kwarg for this model
class ModelImagesKwargs(ImagesKwargs, total=False):
new_image_kwarg: Optional[bool]
class ModelProcessorKwargs(ProcessingKwargs, total=False):
images_kwargs: ModelImagesKwargs
_defaults = {
"images_kwargs: {
"new_image_kwarg": False,
}
"text_kwargs": {
"padding": "max_length",
},
}
```
For Python 3.8 compatibility, when inheriting from this class and overriding one of the kwargs,
you need to manually update the __annotations__ dictionary. This can be done as follows:
```python
class CustomProcessorKwargs(ProcessingKwargs, total=False):
images_kwargs: CustomImagesKwargs
CustomProcessorKwargs.__annotations__["images_kwargs"] = CustomImagesKwargs # python 3.8 compatibility
```python
"""
common_kwargs: CommonKwargs = {
**CommonKwargs.__annotations__,
}
text_kwargs: TextKwargs = {
**TextKwargs.__annotations__,
}
images_kwargs: ImagesKwargs = {
**ImagesKwargs.__annotations__,
}
videos_kwargs: VideosKwargs = {
**VideosKwargs.__annotations__,
}
audio_kwargs: AudioKwargs = {
**AudioKwargs.__annotations__,
}
class ProcessorMixin(PushToHubMixin):
"""
This is a mixin used to provide saving/loading functionality for all processor classes.
"""
attributes = ["feature_extractor", "tokenizer"]
optional_attributes = ["chat_template"]
optional_call_args: List[str] = []
# Names need to be attr_class for attr in attributes
feature_extractor_class = None
tokenizer_class = None
_auto_class = None
valid_kwargs: List[str] = []
# args have to match the attributes class attribute
def __init__(self, *args, **kwargs):
# First, extract optional attributes from kwargs if present
# Optional attributes can never be positional arguments
for optional_attribute in self.optional_attributes:
setattr(self, optional_attribute, kwargs.pop(optional_attribute, None))
# Sanitize args and kwargs
for key in kwargs:
if key not in self.attributes:
raise TypeError(f"Unexpected keyword argument {key}.")
for arg, attribute_name in zip(args, self.attributes):
if attribute_name in kwargs:
raise TypeError(f"Got multiple values for argument {attribute_name}.")
else:
kwargs[attribute_name] = arg
if len(kwargs) != len(self.attributes):
raise ValueError(
f"This processor requires {len(self.attributes)} arguments: {', '.join(self.attributes)}. Got "
f"{len(args)} arguments instead."
)
# Check each arg is of the proper class (this will also catch a user initializing in the wrong order)
for attribute_name, arg in kwargs.items():
class_name = getattr(self, f"{attribute_name}_class")
# Nothing is ever going to be an instance of "AutoXxx", in that case we check the base class.
class_name = AUTO_TO_BASE_CLASS_MAPPING.get(class_name, class_name)
if isinstance(class_name, tuple):
proper_class = tuple(getattr(transformers_module, n) for n in class_name if n is not None)
else:
proper_class = getattr(transformers_module, class_name)
if not isinstance(arg, proper_class):
raise TypeError(
f"Received a {type(arg).__name__} for argument {attribute_name}, but a {class_name} was expected."
)
setattr(self, attribute_name, arg)
def to_dict(self) -> Dict[str, Any]:
"""
Serializes this instance to a Python dictionary.
Returns:
`Dict[str, Any]`: Dictionary of all the attributes that make up this processor instance.
"""
output = copy.deepcopy(self.__dict__)
# Get the kwargs in `__init__`.
sig = inspect.signature(self.__init__)
# Only save the attributes that are presented in the kwargs of `__init__`.
attrs_to_save = sig.parameters
# Don't save attributes like `tokenizer`, `image processor` etc.
attrs_to_save = [x for x in attrs_to_save if x not in self.__class__.attributes]
# extra attributes to be kept
attrs_to_save += ["auto_map"]
output = {k: v for k, v in output.items() if k in attrs_to_save}
output["processor_class"] = self.__class__.__name__
if "tokenizer" in output:
del output["tokenizer"]
if "image_processor" in output:
del output["image_processor"]
if "feature_extractor" in output:
del output["feature_extractor"]
if "chat_template" in output:
del output["chat_template"]
# Some attributes have different names but containing objects that are not simple strings
output = {
k: v
for k, v in output.items()
if not (isinstance(v, PushToHubMixin) or v.__class__.__name__ == "BeamSearchDecoderCTC")
}
return output
def to_json_string(self) -> str:
"""
Serializes this instance to a JSON string.
Returns:
`str`: String containing all the attributes that make up this feature_extractor instance in JSON format.
"""
dictionary = self.to_dict()
return json.dumps(dictionary, indent=2, sort_keys=True) + "\n"
def to_json_file(self, json_file_path: Union[str, os.PathLike]):
"""
Save this instance to a JSON file.
Args:
json_file_path (`str` or `os.PathLike`):
Path to the JSON file in which this processor instance's parameters will be saved.
"""
with open(json_file_path, "w", encoding="utf-8") as writer:
writer.write(self.to_json_string())
def __repr__(self):
attributes_repr = [f"- {name}: {repr(getattr(self, name))}" for name in self.attributes]
attributes_repr = "\n".join(attributes_repr)
return f"{self.__class__.__name__}:\n{attributes_repr}\n\n{self.to_json_string()}"
def save_pretrained(self, save_directory, push_to_hub: bool = False, **kwargs):
"""
Saves the attributes of this processor (feature extractor, tokenizer...) in the specified directory so that it
can be reloaded using the [`~ProcessorMixin.from_pretrained`] method.
This class method is simply calling [`~feature_extraction_utils.FeatureExtractionMixin.save_pretrained`] and
[`~tokenization_utils_base.PreTrainedTokenizerBase.save_pretrained`]. Please refer to the docstrings of the
methods above for more information.
Args:
save_directory (`str` or `os.PathLike`):
Directory where the feature extractor JSON file and the tokenizer files will be saved (directory will
be created if it does not exist).
push_to_hub (`bool`, *optional*, defaults to `False`):
Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the
repository you want to push to with `repo_id` (will default to the name of `save_directory` in your
namespace).
kwargs (`Dict[str, Any]`, *optional*):
Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method.
"""
use_auth_token = kwargs.pop("use_auth_token", None)
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if kwargs.get("token", None) is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
kwargs["token"] = use_auth_token
os.makedirs(save_directory, exist_ok=True)
if push_to_hub:
commit_message = kwargs.pop("commit_message", None)
repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1])
repo_id = self._create_repo(repo_id, **kwargs)
files_timestamps = self._get_files_timestamps(save_directory)
# If we have a custom config, we copy the file defining it in the folder and set the attributes so it can be
# loaded from the Hub.
if self._auto_class is not None:
attrs = [getattr(self, attribute_name) for attribute_name in self.attributes]
configs = [(a.init_kwargs if isinstance(a, PreTrainedTokenizerBase) else a) for a in attrs]
configs.append(self)
custom_object_save(self, save_directory, config=configs)
for attribute_name in self.attributes:
attribute = getattr(self, attribute_name)
# Include the processor class in the attribute config so this processor can then be reloaded with the
# `AutoProcessor` API.
if hasattr(attribute, "_set_processor_class"):
attribute._set_processor_class(self.__class__.__name__)
attribute.save_pretrained(save_directory)
if self._auto_class is not None:
# We added an attribute to the init_kwargs of the tokenizers, which needs to be cleaned up.
for attribute_name in self.attributes:
attribute = getattr(self, attribute_name)
if isinstance(attribute, PreTrainedTokenizerBase):
del attribute.init_kwargs["auto_map"]
# If we save using the predefined names, we can load using `from_pretrained`
# plus we save chat_template in its own file
output_processor_file = os.path.join(save_directory, PROCESSOR_NAME)
output_raw_chat_template_file = os.path.join(save_directory, "chat_template.jinja")
output_chat_template_file = os.path.join(save_directory, "chat_template.json")
processor_dict = self.to_dict()
# Save `chat_template` in its own file. We can't get it from `processor_dict` as we popped it in `to_dict`
# to avoid serializing chat template in json config file. So let's get it from `self` directly
if self.chat_template is not None:
if kwargs.get("save_raw_chat_template", False):
with open(output_raw_chat_template_file, "w", encoding="utf-8") as writer:
writer.write(self.chat_template)
logger.info(f"chat template saved in {output_raw_chat_template_file}")
else:
chat_template_json_string = (
json.dumps({"chat_template": self.chat_template}, indent=2, sort_keys=True) + "\n"
)
with open(output_chat_template_file, "w", encoding="utf-8") as writer:
writer.write(chat_template_json_string)
logger.info(f"chat template saved in {output_chat_template_file}")
# For now, let's not save to `processor_config.json` if the processor doesn't have extra attributes and
# `auto_map` is not specified.
if set(processor_dict.keys()) != {"processor_class"}:
self.to_json_file(output_processor_file)
logger.info(f"processor saved in {output_processor_file}")
if push_to_hub:
self._upload_modified_files(
save_directory,
repo_id,
files_timestamps,
commit_message=commit_message,
token=kwargs.get("token"),
)
if set(processor_dict.keys()) == {"processor_class"}:
return []
return [output_processor_file]
@classmethod
def get_processor_dict(
cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
"""
From a `pretrained_model_name_or_path`, resolve to a dictionary of parameters, to be used for instantiating a
processor of type [`~processing_utils.ProcessingMixin`] using `from_args_and_dict`.
Parameters:
pretrained_model_name_or_path (`str` or `os.PathLike`):
The identifier of the pre-trained checkpoint from which we want the dictionary of parameters.
subfolder (`str`, *optional*, defaults to `""`):
In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can
specify the folder name here.
Returns:
`Tuple[Dict, Dict]`: The dictionary(ies) that will be used to instantiate the processor object.
"""
cache_dir = kwargs.pop("cache_dir", None)
force_download = kwargs.pop("force_download", False)
resume_download = kwargs.pop("resume_download", None)
proxies = kwargs.pop("proxies", None)
token = kwargs.pop("token", None)
local_files_only = kwargs.pop("local_files_only", False)
revision = kwargs.pop("revision", None)
subfolder = kwargs.pop("subfolder", "")
from_pipeline = kwargs.pop("_from_pipeline", None)
from_auto_class = kwargs.pop("_from_auto", False)
user_agent = {"file_type": "processor", "from_auto_class": from_auto_class}
if from_pipeline is not None:
user_agent["using_pipeline"] = from_pipeline
if is_offline_mode() and not local_files_only:
logger.info("Offline mode: forcing local_files_only=True")
local_files_only = True
pretrained_model_name_or_path = str(pretrained_model_name_or_path)
is_local = os.path.isdir(pretrained_model_name_or_path)
if os.path.isdir(pretrained_model_name_or_path):
processor_file = os.path.join(pretrained_model_name_or_path, PROCESSOR_NAME)
if os.path.isfile(pretrained_model_name_or_path):
resolved_processor_file = pretrained_model_name_or_path
# cant't load chat-template when given a file as pretrained_model_name_or_path
resolved_chat_template_file = None
resolved_raw_chat_template_file = None
is_local = True
elif is_remote_url(pretrained_model_name_or_path):
processor_file = pretrained_model_name_or_path
resolved_processor_file = download_url(pretrained_model_name_or_path)
# can't load chat-template when given a file url as pretrained_model_name_or_path
resolved_chat_template_file = None
resolved_raw_chat_template_file = None
else:
processor_file = PROCESSOR_NAME
chat_template_file = "chat_template.json"
raw_chat_template_file = "chat_template.jinja"
try:
# Load from local folder or from cache or download from model Hub and cache
resolved_processor_file = cached_file(
pretrained_model_name_or_path,
processor_file,
cache_dir=cache_dir,
force_download=force_download,
proxies=proxies,
resume_download=resume_download,
local_files_only=local_files_only,
token=token,
user_agent=user_agent,
revision=revision,
subfolder=subfolder,
_raise_exceptions_for_missing_entries=False,
)
# Load chat template from a separate json if exists
# because making it part of processor-config break BC.
# Processors in older version do not accept any kwargs
resolved_chat_template_file = cached_file(
pretrained_model_name_or_path,
chat_template_file,
cache_dir=cache_dir,
force_download=force_download,
proxies=proxies,
resume_download=resume_download,
local_files_only=local_files_only,
token=token,
user_agent=user_agent,
revision=revision,
subfolder=subfolder,
_raise_exceptions_for_missing_entries=False,
)
resolved_raw_chat_template_file = cached_file(
pretrained_model_name_or_path,
raw_chat_template_file,
cache_dir=cache_dir,
force_download=force_download,
proxies=proxies,
resume_download=resume_download,
local_files_only=local_files_only,
token=token,
user_agent=user_agent,
revision=revision,
subfolder=subfolder,
_raise_exceptions_for_missing_entries=False,
)
except EnvironmentError:
# Raise any environment error raise by `cached_file`. It will have a helpful error message adapted to
# the original exception.
raise
except Exception:
# For any other exception, we throw a generic error.
raise EnvironmentError(
f"Can't load processor for '{pretrained_model_name_or_path}'. If you were trying to load"
" it from 'https://huggingface.co/models', make sure you don't have a local directory with the"
f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a"
f" directory containing a {PROCESSOR_NAME} file"
)
# Add chat template as kwarg before returning because most models don't have processor config
if resolved_raw_chat_template_file is not None:
with open(resolved_raw_chat_template_file, "r", encoding="utf-8") as reader:
chat_template = reader.read()
kwargs["chat_template"] = chat_template
elif resolved_chat_template_file is not None:
with open(resolved_chat_template_file, "r", encoding="utf-8") as reader:
text = reader.read()
chat_template = json.loads(text)["chat_template"]
kwargs["chat_template"] = chat_template
# Existing processors on the Hub created before #27761 being merged don't have `processor_config.json` (if not
# updated afterward), and we need to keep `from_pretrained` work. So here it fallbacks to the empty dict.
# (`cached_file` called using `_raise_exceptions_for_missing_entries=False` to avoid exception)
# However, for models added in the future, we won't get the expected error if this file is missing.
if resolved_processor_file is None:
return {}, kwargs
try:
# Load processor dict
with open(resolved_processor_file, "r", encoding="utf-8") as reader:
text = reader.read()
processor_dict = json.loads(text)
except json.JSONDecodeError:
raise EnvironmentError(
f"It looks like the config file at '{resolved_processor_file}' is not a valid JSON file."
)
if is_local:
logger.info(f"loading configuration file {resolved_processor_file}")
else:
logger.info(f"loading configuration file {processor_file} from cache at {resolved_processor_file}")
if "chat_template" in processor_dict and processor_dict["chat_template"] is not None:
logger.warning_once(
"Chat templates should be in a 'chat_template.jinja' file but found key='chat_template' "
"in the processor's config. Make sure to move your template to its own file."
)
if not is_local:
if "auto_map" in processor_dict:
processor_dict["auto_map"] = add_model_info_to_auto_map(
processor_dict["auto_map"], pretrained_model_name_or_path
)
if "custom_pipelines" in processor_dict:
processor_dict["custom_pipelines"] = add_model_info_to_custom_pipelines(
processor_dict["custom_pipelines"], pretrained_model_name_or_path
)
return processor_dict, kwargs
@classmethod
def from_args_and_dict(cls, args, processor_dict: Dict[str, Any], **kwargs):
"""
Instantiates a type of [`~processing_utils.ProcessingMixin`] from a Python dictionary of parameters.
Args:
processor_dict (`Dict[str, Any]`):
Dictionary that will be used to instantiate the processor object. Such a dictionary can be
retrieved from a pretrained checkpoint by leveraging the
[`~processing_utils.ProcessingMixin.to_dict`] method.
kwargs (`Dict[str, Any]`):
Additional parameters from which to initialize the processor object.
Returns:
[`~processing_utils.ProcessingMixin`]: The processor object instantiated from those
parameters.
"""
processor_dict = processor_dict.copy()
return_unused_kwargs = kwargs.pop("return_unused_kwargs", False)
chat_template = kwargs.pop("chat_template", None)
# We have to pop up some unused (but specific) kwargs and then validate that it doesn't contain unused kwargs
# If we don't pop, some specific kwargs will raise a warning
if "processor_class" in processor_dict:
del processor_dict["processor_class"]
if "auto_map" in processor_dict:
del processor_dict["auto_map"]
unused_kwargs = cls.validate_init_kwargs(processor_config=processor_dict, valid_kwargs=cls.valid_kwargs)
processor = cls(*args, **processor_dict)
if chat_template is not None:
setattr(processor, "chat_template", chat_template)
# Update processor with kwargs if needed
for key in set(kwargs.keys()):
if hasattr(processor, key):
setattr(processor, key, kwargs.pop(key))
kwargs.update(unused_kwargs)
logger.info(f"Processor {processor}")
if return_unused_kwargs:
return processor, kwargs
else:
return processor
def _merge_kwargs(
self,
ModelProcessorKwargs: ProcessingKwargs,
tokenizer_init_kwargs: Optional[Dict] = None,
**kwargs,
) -> Dict[str, Dict]:
"""
Method to merge dictionaries of kwargs cleanly separated by modality within a Processor instance.
The order of operations is as follows:
1) kwargs passed as before have highest priority to preserve BC.
```python
high_priority_kwargs = {"crop_size" = {"height": 222, "width": 222}, "padding" = "max_length"}
processor(..., **high_priority_kwargs)
```
2) kwargs passed as modality-specific kwargs have second priority. This is the recommended API.
```python
processor(..., text_kwargs={"padding": "max_length"}, images_kwargs={"crop_size": {"height": 222, "width": 222}}})
```
3) kwargs passed during instantiation of a modality processor have fourth priority.
```python
tokenizer = tokenizer_class(..., {"padding": "max_length"})
image_processor = image_processor_class(...)
processor(tokenizer, image_processor) # will pass max_length unless overriden by kwargs at call
```
4) defaults kwargs specified at processor level have lowest priority.
```python
class MyProcessingKwargs(ProcessingKwargs, CommonKwargs, TextKwargs, ImagesKwargs, total=False):
_defaults = {
"text_kwargs": {
"padding": "max_length",
"max_length": 64,
},
}
```
Args:
ModelProcessorKwargs (`ProcessingKwargs`):
Typed dictionary of kwargs specifically required by the model passed.
tokenizer_init_kwargs (`Dict`, *optional*):
Dictionary of kwargs the tokenizer was instantiated with and need to take precedence over defaults.
Returns:
output_kwargs (`Dict`):
Dictionary of per-modality kwargs to be passed to each modality-specific processor.
"""
# Initialize dictionaries
output_kwargs = {
"text_kwargs": {},
"images_kwargs": {},
"audio_kwargs": {},
"videos_kwargs": {},
"common_kwargs": {},
}
default_kwargs = {
"text_kwargs": {},
"images_kwargs": {},
"audio_kwargs": {},
"videos_kwargs": {},
"common_kwargs": {},
}
used_keys = set()
# get defaults from set model processor kwargs if they exist
for modality in default_kwargs:
default_kwargs[modality] = ModelProcessorKwargs._defaults.get(modality, {}).copy()
# update defaults with arguments from tokenizer init
for modality_key in ModelProcessorKwargs.__annotations__[modality].__annotations__.keys():
# init with tokenizer init kwargs if necessary
if modality_key in tokenizer_init_kwargs:
value = (
getattr(self.tokenizer, modality_key)
if hasattr(self.tokenizer, modality_key)
else tokenizer_init_kwargs[modality_key]
)
default_kwargs[modality][modality_key] = value
# now defaults kwargs are updated with the tokenizers defaults.
# pass defaults to output dictionary
output_kwargs.update(default_kwargs)
# update modality kwargs with passed kwargs
non_modality_kwargs = set(kwargs) - set(output_kwargs)
for modality in output_kwargs:
for modality_key in ModelProcessorKwargs.__annotations__[modality].__annotations__.keys():
# check if we received a structured kwarg dict or not to handle it correctly
if modality in kwargs:
kwarg_value = kwargs[modality].pop(modality_key, "__empty__")
# check if this key was passed as a flat kwarg.
if kwarg_value != "__empty__" and modality_key in non_modality_kwargs:
raise ValueError(
f"Keyword argument {modality_key} was passed two times:\n"
f"in a dictionary for {modality} and as a **kwarg."
)
elif modality_key in kwargs:
# we get a modality_key instead of popping it because modality-specific processors
# can have overlapping kwargs
kwarg_value = kwargs.get(modality_key, "__empty__")
else:
kwarg_value = "__empty__"
if kwarg_value != "__empty__":
output_kwargs[modality][modality_key] = kwarg_value
used_keys.add(modality_key)
# Determine if kwargs is a flat dictionary or contains nested dictionaries
if any(key in default_kwargs for key in kwargs):
# kwargs is dictionary-based, and some keys match modality names
for modality, subdict in kwargs.items():
if modality in default_kwargs:
for subkey, subvalue in subdict.items():
if subkey not in used_keys:
output_kwargs[modality][subkey] = subvalue
used_keys.add(subkey)
else:
# kwargs is a flat dictionary
for key in kwargs:
if key not in used_keys:
if key in ModelProcessorKwargs.__annotations__["common_kwargs"].__annotations__.keys():
output_kwargs["common_kwargs"][key] = kwargs[key]
else:
logger.warning_once(
f"Keyword argument `{key}` is not a valid argument for this processor and will be ignored."
)
# all modality-specific kwargs are updated with common kwargs
for modality in output_kwargs:
output_kwargs[modality].update(output_kwargs["common_kwargs"])
return output_kwargs
@classmethod
def from_pretrained(
cls,
pretrained_model_name_or_path: Union[str, os.PathLike],
cache_dir: Optional[Union[str, os.PathLike]] = None,
force_download: bool = False,
local_files_only: bool = False,
token: Optional[Union[str, bool]] = None,
revision: str = "main",
**kwargs,
):
r"""
Instantiate a processor associated with a pretrained model.
This class method is simply calling the feature extractor
[`~feature_extraction_utils.FeatureExtractionMixin.from_pretrained`], image processor
[`~image_processing_utils.ImageProcessingMixin`] and the tokenizer
[`~tokenization_utils_base.PreTrainedTokenizer.from_pretrained`] methods. Please refer to the docstrings of the
methods above for more information.
Args:
pretrained_model_name_or_path (`str` or `os.PathLike`):
This can be either:
- a string, the *model id* of a pretrained feature_extractor hosted inside a model repo on
huggingface.co.
- a path to a *directory* containing a feature extractor file saved using the
[`~SequenceFeatureExtractor.save_pretrained`] method, e.g., `./my_model_directory/`.
- a path or url to a saved feature extractor JSON *file*, e.g.,
`./my_model_directory/preprocessor_config.json`.
**kwargs
Additional keyword arguments passed along to both
[`~feature_extraction_utils.FeatureExtractionMixin.from_pretrained`] and
[`~tokenization_utils_base.PreTrainedTokenizer.from_pretrained`].
"""
kwargs["cache_dir"] = cache_dir
kwargs["force_download"] = force_download
kwargs["local_files_only"] = local_files_only
kwargs["revision"] = revision
use_auth_token = kwargs.pop("use_auth_token", None)
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if token is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
token = use_auth_token
if token is not None:
kwargs["token"] = token
args = cls._get_arguments_from_pretrained(pretrained_model_name_or_path, **kwargs)
processor_dict, kwargs = cls.get_processor_dict(pretrained_model_name_or_path, **kwargs)
return cls.from_args_and_dict(args, processor_dict, **kwargs)
@classmethod
def register_for_auto_class(cls, auto_class="AutoProcessor"):
"""
Register this class with a given auto class. This should only be used for custom feature extractors as the ones
in the library are already mapped with `AutoProcessor`.
This API is experimental and may have some slight breaking changes in the next releases.
Args:
auto_class (`str` or `type`, *optional*, defaults to `"AutoProcessor"`):
The auto class to register this new feature extractor with.
"""
if not isinstance(auto_class, str):
auto_class = auto_class.__name__
import transformers.models.auto as auto_module
if not hasattr(auto_module, auto_class):
raise ValueError(f"{auto_class} is not a valid auto class.")
cls._auto_class = auto_class
@classmethod
def _get_arguments_from_pretrained(cls, pretrained_model_name_or_path, **kwargs):
args = []
for attribute_name in cls.attributes:
class_name = getattr(cls, f"{attribute_name}_class")
if isinstance(class_name, tuple):
classes = tuple(getattr(transformers_module, n) if n is not None else None for n in class_name)
use_fast = kwargs.get("use_fast", True)
if use_fast and classes[1] is not None:
attribute_class = classes[1]
else:
attribute_class = classes[0]
else:
attribute_class = getattr(transformers_module, class_name)
args.append(attribute_class.from_pretrained(pretrained_model_name_or_path, **kwargs))
return args
@property
def model_input_names(self):
first_attribute = getattr(self, self.attributes[0])
return getattr(first_attribute, "model_input_names", None)
@staticmethod
def validate_init_kwargs(processor_config, valid_kwargs):
kwargs_from_config = processor_config.keys()
unused_kwargs = {}
unused_keys = set(kwargs_from_config) - set(valid_kwargs)
if unused_keys:
unused_key_str = ", ".join(unused_keys)
logger.warning(
f"Some kwargs in processor config are unused and will not have any effect: {unused_key_str}. "
)
unused_kwargs = {k: processor_config[k] for k in unused_keys}
return unused_kwargs
def prepare_and_validate_optional_call_args(self, *args):
"""
Matches optional positional arguments to their corresponding names in `optional_call_args`
in the processor class in the order they are passed to the processor call.
Note that this should only be used in the `__call__` method of the processors with special
arguments. Special arguments are arguments that aren't `text`, `images`, `audio`, nor `videos`
but also aren't passed to the tokenizer, image processor, etc. Examples of such processors are:
- `CLIPSegProcessor`
- `LayoutLMv2Processor`
- `OwlViTProcessor`
Also note that passing by position to the processor call is now deprecated and will be disallowed
in future versions. We only have this for backward compatibility.
Example:
Suppose that the processor class has `optional_call_args = ["arg_name_1", "arg_name_2"]`.
And we define the call method as:
```python
def __call__(
self,
text: str,
images: Optional[ImageInput] = None,
*arg,
audio=None,
videos=None,
)
```
Then, if we call the processor as:
```python
images = [...]
processor("What is common in these images?", images, arg_value_1, arg_value_2)
```
Then, this method will return:
```python
{
"arg_name_1": arg_value_1,
"arg_name_2": arg_value_2,
}
```
which we could then pass as kwargs to `self._merge_kwargs`
"""
if len(args):
warnings.warn(
"Passing positional arguments to the processor call is now deprecated and will be disallowed in v4.47. "
"Please pass all arguments as keyword arguments."
)
if len(args) > len(self.optional_call_args):
raise ValueError(
f"Expected *at most* {len(self.optional_call_args)} optional positional arguments in processor call"
f"which will be matched with {' '.join(self.optional_call_args)} in the order they are passed."
f"However, got {len(args)} positional arguments instead."
"Please pass all arguments as keyword arguments instead (e.g. `processor(arg_name_1=..., arg_name_2=...))`."
)
return {arg_name: arg_value for arg_value, arg_name in zip(args, self.optional_call_args)}
def apply_chat_template(
self,
conversation: Union[List[Dict[str, str]]],
chat_template: Optional[str] = None,
tokenize: bool = False,
**kwargs,
) -> str:
"""
Similar to the `apply_chat_template` method on tokenizers, this method applies a Jinja template to input
conversations to turn them into a single tokenizable string.
Args:
conversation (`List[Dict, str, str]`):
The conversation to format.
chat_template (`Optional[str]`, *optional*):
The Jinja template to use for formatting the conversation. If not provided, the tokenizer's
chat template is used.
tokenize (`bool`, *optional*, defaults to `False`):
Whether to tokenize the output or not.
**kwargs:
Additional keyword arguments
"""
if chat_template is None:
if self.chat_template is not None:
chat_template = self.chat_template
else:
raise ValueError(
"No chat template is set for this processor. Please either set the `chat_template` attribute, "
"or provide a chat template as an argument. See "
"https://huggingface.co/docs/transformers/main/en/chat_templating for more information."
)
return self.tokenizer.apply_chat_template(
conversation, chat_template=chat_template, tokenize=tokenize, **kwargs
)
def post_process_image_text_to_text(self, generated_outputs):
"""
Post-process the output of a vlm to decode the text.
Args:
generated_outputs (`torch.Tensor` or `np.ndarray`):
The output of the model `generate` function. The output is expected to be a tensor of shape `(batch_size, sequence_length)`
or `(sequence_length,)`.
Returns:
`List[str]`: The decoded text.
"""
return self.tokenizer.batch_decode(generated_outputs, skip_special_tokens=True)
def _validate_images_text_input_order(images, text):
"""
For backward compatibility: reverse the order of `images` and `text` inputs if they are swapped.
This method should only be called for processors where `images` and `text` have been swapped for uniformization purposes.
Note that this method assumes that two `None` inputs are valid inputs. If this is not the case, it should be handled
in the processor's `__call__` method before calling this method.
"""
def is_url(val) -> bool:
return isinstance(val, str) and val.startswith("http")
def _is_valid_images_input_for_processor(imgs):
# If we have an list of images, make sure every image is valid
if isinstance(imgs, (list, tuple)):
for img in imgs:
if not _is_valid_images_input_for_processor(img):
return False
# If not a list or tuple, we have been given a single image or batched tensor of images
elif not (is_valid_image(imgs) or is_url(imgs)):
return False
return True
def _is_valid_text_input_for_processor(t):
if isinstance(t, str):
# Strings are fine
return True
elif isinstance(t, (list, tuple)):
# List are fine as long as they are...
if len(t) == 0:
# ... not empty
return False
for t_s in t:
return _is_valid_text_input_for_processor(t_s)
return False
def _is_valid(input, validator):
return validator(input) or input is None
images_is_valid = _is_valid(images, _is_valid_images_input_for_processor)
images_is_text = _is_valid_text_input_for_processor(images)
text_is_valid = _is_valid(text, _is_valid_text_input_for_processor)
text_is_images = _is_valid_images_input_for_processor(text)
# Handle cases where both inputs are valid
if images_is_valid and text_is_valid:
return images, text
# Handle cases where inputs need to and can be swapped
if (images is None and text_is_images) or (text is None and images_is_text) or (images_is_text and text_is_images):
logger.warning_once(
"You may have used the wrong order for inputs. `images` should be passed before `text`. "
"The `images` and `text` inputs will be swapped. This behavior will be deprecated in transformers v4.47."
)
return text, images
raise ValueError("Invalid input type. Check that `images` and/or `text` are valid inputs.")
ProcessorMixin.push_to_hub = copy_func(ProcessorMixin.push_to_hub)
if ProcessorMixin.push_to_hub.__doc__ is not None:
ProcessorMixin.push_to_hub.__doc__ = ProcessorMixin.push_to_hub.__doc__.format(
object="processor", object_class="AutoProcessor", object_files="processor files"
)