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diffuse-custom / diffusers /pipeline_utils.py

Jackflack09

Duplicate from YeOldHermit/Super-Resolution-Anime-Diffusion

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	# coding=utf-8
	# Copyright 2022 The HuggingFace Inc. team.
	# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
	#
	# 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.

	import importlib
	import inspect
	import os
	from dataclasses import dataclass
	from pathlib import Path
	from typing import Any, Dict, List, Optional, Union

	import numpy as np
	import torch

	import diffusers
	import PIL
	from huggingface_hub import model_info, snapshot_download
	from packaging import version
	from PIL import Image
	from tqdm.auto import tqdm

	from .configuration_utils import ConfigMixin
	from .dynamic_modules_utils import get_class_from_dynamic_module
	from .hub_utils import http_user_agent
	from .modeling_utils import _LOW_CPU_MEM_USAGE_DEFAULT
	from .schedulers.scheduling_utils import SCHEDULER_CONFIG_NAME
	from .utils import (
	CONFIG_NAME,
	DIFFUSERS_CACHE,
	ONNX_WEIGHTS_NAME,
	WEIGHTS_NAME,
	BaseOutput,
	deprecate,
	is_accelerate_available,
	is_safetensors_available,
	is_torch_version,
	is_transformers_available,
	logging,
	)


	if is_transformers_available():
	import transformers
	from transformers import PreTrainedModel


	INDEX_FILE = "diffusion_pytorch_model.bin"
	CUSTOM_PIPELINE_FILE_NAME = "pipeline.py"
	DUMMY_MODULES_FOLDER = "diffusers.utils"
	TRANSFORMERS_DUMMY_MODULES_FOLDER = "transformers.utils"


	logger = logging.get_logger(__name__)


	LOADABLE_CLASSES = {
	"diffusers": {
	"ModelMixin": ["save_pretrained", "from_pretrained"],
	"SchedulerMixin": ["save_pretrained", "from_pretrained"],
	"DiffusionPipeline": ["save_pretrained", "from_pretrained"],
	"OnnxRuntimeModel": ["save_pretrained", "from_pretrained"],
	},
	"transformers": {
	"PreTrainedTokenizer": ["save_pretrained", "from_pretrained"],
	"PreTrainedTokenizerFast": ["save_pretrained", "from_pretrained"],
	"PreTrainedModel": ["save_pretrained", "from_pretrained"],
	"FeatureExtractionMixin": ["save_pretrained", "from_pretrained"],
	"ProcessorMixin": ["save_pretrained", "from_pretrained"],
	"ImageProcessingMixin": ["save_pretrained", "from_pretrained"],
	},
	"onnxruntime.training": {
	"ORTModule": ["save_pretrained", "from_pretrained"],
	},
	}

	ALL_IMPORTABLE_CLASSES = {}
	for library in LOADABLE_CLASSES:
	ALL_IMPORTABLE_CLASSES.update(LOADABLE_CLASSES[library])


	@dataclass
	class ImagePipelineOutput(BaseOutput):
	"""
	Output class for image pipelines.

	Args:
	images (`List[PIL.Image.Image]` or `np.ndarray`)
	List of denoised PIL images of length `batch_size` or numpy array of shape `(batch_size, height, width,
	num_channels)`. PIL images or numpy array present the denoised images of the diffusion pipeline.
	"""

	images: Union[List[PIL.Image.Image], np.ndarray]


	@dataclass
	class AudioPipelineOutput(BaseOutput):
	"""
	Output class for audio pipelines.

	Args:
	audios (`np.ndarray`)
	List of denoised samples of shape `(batch_size, num_channels, sample_rate)`. Numpy array present the
	denoised audio samples of the diffusion pipeline.
	"""

	audios: np.ndarray


	def is_safetensors_compatible(info) -> bool:
	filenames = set(sibling.rfilename for sibling in info.siblings)
	pt_filenames = set(filename for filename in filenames if filename.endswith(".bin"))
	is_safetensors_compatible = any(file.endswith(".safetensors") for file in filenames)
	for pt_filename in pt_filenames:
	prefix, raw = os.path.split(pt_filename)
	if raw == "pytorch_model.bin":
	# transformers specific
	sf_filename = os.path.join(prefix, "model.safetensors")
	else:
	sf_filename = pt_filename[: -len(".bin")] + ".safetensors"
	if is_safetensors_compatible and sf_filename not in filenames:
	logger.warning(f"{sf_filename} not found")
	is_safetensors_compatible = False
	return is_safetensors_compatible


	class DiffusionPipeline(ConfigMixin):
	r"""
	Base class for all models.

	[`DiffusionPipeline`] takes care of storing all components (models, schedulers, processors) for diffusion pipelines
	and handles methods for loading, downloading and saving models as well as a few methods common to all pipelines to:

	- move all PyTorch modules to the device of your choice
	- enabling/disabling the progress bar for the denoising iteration

	Class attributes:

	- config_name (`str`) -- name of the config file that will store the class and module names of all
	components of the diffusion pipeline.
	- _optional_components (List[`str`]) -- list of all components that are optional so they don't have to be
	passed for the pipeline to function (should be overridden by subclasses).
	"""
	config_name = "model_index.json"
	_optional_components = []

	def register_modules(self, **kwargs):
	# import it here to avoid circular import
	from diffusers import pipelines

	for name, module in kwargs.items():
	# retrieve library
	if module is None:
	register_dict = {name: (None, None)}
	else:
	library = module.__module__.split(".")[0]

	# check if the module is a pipeline module
	pipeline_dir = module.__module__.split(".")[-2] if len(module.__module__.split(".")) > 2 else None
	path = module.__module__.split(".")
	is_pipeline_module = pipeline_dir in path and hasattr(pipelines, pipeline_dir)

	# if library is not in LOADABLE_CLASSES, then it is a custom module.
	# Or if it's a pipeline module, then the module is inside the pipeline
	# folder so we set the library to module name.
	if library not in LOADABLE_CLASSES or is_pipeline_module:
	library = pipeline_dir

	# retrieve class_name
	class_name = module.__class__.__name__

	register_dict = {name: (library, class_name)}

	# save model index config
	self.register_to_config(**register_dict)

	# set models
	setattr(self, name, module)

	def save_pretrained(
	self,
	save_directory: Union[str, os.PathLike],
	safe_serialization: bool = False,
	):
	"""
	Save all variables of the pipeline that can be saved and loaded as well as the pipelines configuration file to
	a directory. A pipeline variable can be saved and loaded if its class implements both a save and loading
	method. The pipeline can easily be re-loaded using the `[`~DiffusionPipeline.from_pretrained`]` class method.

	Arguments:
	save_directory (`str` or `os.PathLike`):
	Directory to which to save. Will be created if it doesn't exist.
	safe_serialization (`bool`, optional, defaults to `False`):
	Whether to save the model using `safetensors` or the traditional PyTorch way (that uses `pickle`).
	"""
	self.save_config(save_directory)

	model_index_dict = dict(self.config)
	model_index_dict.pop("_class_name")
	model_index_dict.pop("_diffusers_version")
	model_index_dict.pop("_module", None)

	expected_modules, optional_kwargs = self._get_signature_keys(self)

	def is_saveable_module(name, value):
	if name not in expected_modules:
	return False
	if name in self._optional_components and value[0] is None:
	return False
	return True

	model_index_dict = {k: v for k, v in model_index_dict.items() if is_saveable_module(k, v)}

	for pipeline_component_name in model_index_dict.keys():
	sub_model = getattr(self, pipeline_component_name)
	model_cls = sub_model.__class__

	save_method_name = None
	# search for the model's base class in LOADABLE_CLASSES
	for library_name, library_classes in LOADABLE_CLASSES.items():
	library = importlib.import_module(library_name)
	for base_class, save_load_methods in library_classes.items():
	class_candidate = getattr(library, base_class, None)
	if class_candidate is not None and issubclass(model_cls, class_candidate):
	# if we found a suitable base class in LOADABLE_CLASSES then grab its save method
	save_method_name = save_load_methods[0]
	break
	if save_method_name is not None:
	break

	save_method = getattr(sub_model, save_method_name)

	# Call the save method with the argument safe_serialization only if it's supported
	save_method_signature = inspect.signature(save_method)
	save_method_accept_safe = "safe_serialization" in save_method_signature.parameters
	if save_method_accept_safe:
	save_method(
	os.path.join(save_directory, pipeline_component_name), safe_serialization=safe_serialization
	)
	else:
	save_method(os.path.join(save_directory, pipeline_component_name))

	def to(self, torch_device: Optional[Union[str, torch.device]] = None):
	if torch_device is None:
	return self

	module_names, _, _ = self.extract_init_dict(dict(self.config))
	for name in module_names.keys():
	module = getattr(self, name)
	if isinstance(module, torch.nn.Module):
	if module.dtype == torch.float16 and str(torch_device) in ["cpu"]:
	logger.warning(
	"Pipelines loaded with `torch_dtype=torch.float16` cannot run with `cpu` device. It"
	" is not recommended to move them to `cpu` as running them will fail. Please make"
	" sure to use an accelerator to run the pipeline in inference, due to the lack of"
	" support for`float16` operations on this device in PyTorch. Please, remove the"
	" `torch_dtype=torch.float16` argument, or use another device for inference."
	)
	module.to(torch_device)
	return self

	@property
	def device(self) -> torch.device:
	r"""
	Returns:
	`torch.device`: The torch device on which the pipeline is located.
	"""
	module_names, _, _ = self.extract_init_dict(dict(self.config))
	for name in module_names.keys():
	module = getattr(self, name)
	if isinstance(module, torch.nn.Module):
	return module.device
	return torch.device("cpu")

	@classmethod
	def from_pretrained(cls, pretrained_model_name_or_path: Optional[Union[str, os.PathLike]], **kwargs):
	r"""
	Instantiate a PyTorch diffusion pipeline from pre-trained pipeline weights.

	The pipeline is set in evaluation mode by default using `model.eval()` (Dropout modules are deactivated).

	The warning Weights from XXX not initialized from pretrained model means that the weights of XXX do not come
	pretrained with the rest of the model. It is up to you to train those weights with a downstream fine-tuning
	task.

	The warning Weights from XXX not used in YYY means that the layer XXX is not used by YYY, therefore those
	weights are discarded.

	Parameters:
	pretrained_model_name_or_path (`str` or `os.PathLike`, optional):
	Can be either:

	- A string, the repo id of a pretrained pipeline hosted inside a model repo on
	https://huggingface.co/ Valid repo ids have to be located under a user or organization name, like
	`CompVis/ldm-text2im-large-256`.
	- A path to a directory containing pipeline weights saved using
	[`~DiffusionPipeline.save_pretrained`], e.g., `./my_pipeline_directory/`.
	torch_dtype (`str` or `torch.dtype`, optional):
	Override the default `torch.dtype` and load the model under this dtype. If `"auto"` is passed the dtype
	will be automatically derived from the model's weights.
	custom_pipeline (`str`, optional):

	<Tip warning={true}>

	This is an experimental feature and is likely to change in the future.

	</Tip>

	Can be either:

	- A string, the repo id of a custom pipeline hosted inside a model repo on
	https://huggingface.co/. Valid repo ids have to be located under a user or organization name,
	like `hf-internal-testing/diffusers-dummy-pipeline`.

	<Tip>

	It is required that the model repo has a file, called `pipeline.py` that defines the custom
	pipeline.

	</Tip>

	- A string, the file name of a community pipeline hosted on GitHub under
	https://github.com/huggingface/diffusers/tree/main/examples/community. Valid file names have to
	match exactly the file name without `.py` located under the above link, e.g.
	`clip_guided_stable_diffusion`.

	<Tip>

	Community pipelines are always loaded from the current `main` branch of GitHub.

	</Tip>

	- A path to a directory containing a custom pipeline, e.g., `./my_pipeline_directory/`.

	<Tip>

	It is required that the directory has a file, called `pipeline.py` that defines the custom
	pipeline.

	</Tip>

	For more information on how to load and create custom pipelines, please have a look at [Loading and
	Adding Custom
	Pipelines](https://huggingface.co/docs/diffusers/using-diffusers/custom_pipeline_overview)

	torch_dtype (`str` or `torch.dtype`, optional):
	force_download (`bool`, optional, defaults to `False`):
	Whether or not to force the (re-)download of the model weights and configuration files, overriding the
	cached versions if they exist.
	resume_download (`bool`, optional, defaults to `False`):
	Whether or not to delete incompletely received files. Will attempt to resume the download if such a
	file exists.
	proxies (`Dict[str, str]`, optional):
	A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128',
	'http://hostname': 'foo.bar:4012'}`. The proxies are used on each request.
	output_loading_info(`bool`, optional, defaults to `False`):
	Whether or not to also return a dictionary containing missing keys, unexpected keys and error messages.
	local_files_only(`bool`, optional, defaults to `False`):
	Whether or not to only look at local files (i.e., do not try to download the model).
	use_auth_token (`str` or bool, optional):
	The token to use as HTTP bearer authorization for remote files. If `True`, will use the token generated
	when running `huggingface-cli login` (stored in `~/.huggingface`).
	revision (`str`, optional, defaults to `"main"`):
	The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a
	git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any
	identifier allowed by git.
	mirror (`str`, optional):
	Mirror source to accelerate downloads in China. If you are from China and have an accessibility
	problem, you can set this option to resolve it. Note that we do not guarantee the timeliness or safety.
	Please refer to the mirror site for more information. specify the folder name here.
	device_map (`str` or `Dict[str, Union[int, str, torch.device]]`, optional):
	A map that specifies where each submodule should go. It doesn't need to be refined to each
	parameter/buffer name, once a given module name is inside, every submodule of it will be sent to the
	same device.

	To have Accelerate compute the most optimized `device_map` automatically, set `device_map="auto"`. For
	more information about each option see [designing a device
	map](https://hf.co/docs/accelerate/main/en/usage_guides/big_modeling#designing-a-device-map).
	low_cpu_mem_usage (`bool`, optional, defaults to `True` if torch version >= 1.9.0 else `False`):
	Speed up model loading by not initializing the weights and only loading the pre-trained weights. This
	also tries to not use more than 1x model size in CPU memory (including peak memory) while loading the
	model. This is only supported when torch version >= 1.9.0. If you are using an older version of torch,
	setting this argument to `True` will raise an error.
	return_cached_folder (`bool`, optional, defaults to `False`):
	If set to `True`, path to downloaded cached folder will be returned in addition to loaded pipeline.
	kwargs (remaining dictionary of keyword arguments, optional):
	Can be used to overwrite load - and saveable variables - i.e. the pipeline components - of the
	specific pipeline class. The overwritten components are then directly passed to the pipelines
	`__init__` method. See example below for more information.

	<Tip>

	It is required to be logged in (`huggingface-cli login`) when you want to use private or [gated
	models](https://huggingface.co/docs/hub/models-gated#gated-models), e.g. `"runwayml/stable-diffusion-v1-5"`

	</Tip>

	<Tip>

	Activate the special ["offline-mode"](https://huggingface.co/diffusers/installation.html#offline-mode) to use
	this method in a firewalled environment.

	</Tip>

	Examples:

	```py
	>>> from diffusers import DiffusionPipeline

	>>> # Download pipeline from huggingface.co and cache.
	>>> pipeline = DiffusionPipeline.from_pretrained("CompVis/ldm-text2im-large-256")

	>>> # Download pipeline that requires an authorization token
	>>> # For more information on access tokens, please refer to this section
	>>> # of the documentation](https://huggingface.co/docs/hub/security-tokens)
	>>> pipeline = DiffusionPipeline.from_pretrained("runwayml/stable-diffusion-v1-5")

	>>> # Use a different scheduler
	>>> from diffusers import LMSDiscreteScheduler

	>>> scheduler = LMSDiscreteScheduler.from_config(pipeline.scheduler.config)
	>>> pipeline.scheduler = scheduler
	```
	"""
	cache_dir = kwargs.pop("cache_dir", DIFFUSERS_CACHE)
	resume_download = kwargs.pop("resume_download", False)
	force_download = kwargs.pop("force_download", False)
	proxies = kwargs.pop("proxies", None)
	local_files_only = kwargs.pop("local_files_only", False)
	use_auth_token = kwargs.pop("use_auth_token", None)
	revision = kwargs.pop("revision", None)
	torch_dtype = kwargs.pop("torch_dtype", None)
	custom_pipeline = kwargs.pop("custom_pipeline", None)
	provider = kwargs.pop("provider", None)
	sess_options = kwargs.pop("sess_options", None)
	device_map = kwargs.pop("device_map", None)
	low_cpu_mem_usage = kwargs.pop("low_cpu_mem_usage", _LOW_CPU_MEM_USAGE_DEFAULT)
	return_cached_folder = kwargs.pop("return_cached_folder", False)

	# 1. Download the checkpoints and configs
	# use snapshot download here to get it working from from_pretrained
	if not os.path.isdir(pretrained_model_name_or_path):
	config_dict = cls.load_config(
	pretrained_model_name_or_path,
	cache_dir=cache_dir,
	resume_download=resume_download,
	force_download=force_download,
	proxies=proxies,
	local_files_only=local_files_only,
	use_auth_token=use_auth_token,
	revision=revision,
	)
	# make sure we only download sub-folders and `diffusers` filenames
	folder_names = [k for k in config_dict.keys() if not k.startswith("_")]
	allow_patterns = [os.path.join(k, "*") for k in folder_names]
	allow_patterns += [WEIGHTS_NAME, SCHEDULER_CONFIG_NAME, CONFIG_NAME, ONNX_WEIGHTS_NAME, cls.config_name]

	# make sure we don't download flax weights
	ignore_patterns = ["*.msgpack"]

	if custom_pipeline is not None:
	allow_patterns += [CUSTOM_PIPELINE_FILE_NAME]

	if cls != DiffusionPipeline:
	requested_pipeline_class = cls.__name__
	else:
	requested_pipeline_class = config_dict.get("_class_name", cls.__name__)
	user_agent = {"pipeline_class": requested_pipeline_class}
	if custom_pipeline is not None:
	user_agent["custom_pipeline"] = custom_pipeline
	user_agent = http_user_agent(user_agent)

	if is_safetensors_available():
	info = model_info(
	pretrained_model_name_or_path,
	use_auth_token=use_auth_token,
	revision=revision,
	)
	if is_safetensors_compatible(info):
	ignore_patterns.append("*.bin")

	# download all allow_patterns
	cached_folder = snapshot_download(
	pretrained_model_name_or_path,
	cache_dir=cache_dir,
	resume_download=resume_download,
	proxies=proxies,
	local_files_only=local_files_only,
	use_auth_token=use_auth_token,
	revision=revision,
	allow_patterns=allow_patterns,
	ignore_patterns=ignore_patterns,
	user_agent=user_agent,
	)
	else:
	cached_folder = pretrained_model_name_or_path

	config_dict = cls.load_config(cached_folder)

	# 2. Load the pipeline class, if using custom module then load it from the hub
	# if we load from explicit class, let's use it
	if custom_pipeline is not None:
	if custom_pipeline.endswith(".py"):
	path = Path(custom_pipeline)
	# decompose into folder & file
	file_name = path.name
	custom_pipeline = path.parent.absolute()
	else:
	file_name = CUSTOM_PIPELINE_FILE_NAME

	pipeline_class = get_class_from_dynamic_module(
	custom_pipeline, module_file=file_name, cache_dir=custom_pipeline
	)
	elif cls != DiffusionPipeline:
	pipeline_class = cls
	else:
	diffusers_module = importlib.import_module(cls.__module__.split(".")[0])
	pipeline_class = getattr(diffusers_module, config_dict["_class_name"])

	# To be removed in 1.0.0
	if pipeline_class.__name__ == "StableDiffusionInpaintPipeline" and version.parse(
	version.parse(config_dict["_diffusers_version"]).base_version
	) <= version.parse("0.5.1"):
	from diffusers import StableDiffusionInpaintPipeline, StableDiffusionInpaintPipelineLegacy

	pipeline_class = StableDiffusionInpaintPipelineLegacy

	deprecation_message = (
	"You are using a legacy checkpoint for inpainting with Stable Diffusion, therefore we are loading the"
	f" {StableDiffusionInpaintPipelineLegacy} class instead of {StableDiffusionInpaintPipeline}. For"
	" better inpainting results, we strongly suggest using Stable Diffusion's official inpainting"
	" checkpoint: https://huggingface.co/runwayml/stable-diffusion-inpainting instead or adapting your"
	f" checkpoint {pretrained_model_name_or_path} to the format of"
	" https://huggingface.co/runwayml/stable-diffusion-inpainting. Note that we do not actively maintain"
	" the {StableDiffusionInpaintPipelineLegacy} class and will likely remove it in version 1.0.0."
	)
	deprecate("StableDiffusionInpaintPipelineLegacy", "1.0.0", deprecation_message, standard_warn=False)

	# some modules can be passed directly to the init
	# in this case they are already instantiated in `kwargs`
	# extract them here
	expected_modules, optional_kwargs = cls._get_signature_keys(pipeline_class)
	passed_class_obj = {k: kwargs.pop(k) for k in expected_modules if k in kwargs}
	passed_pipe_kwargs = {k: kwargs.pop(k) for k in optional_kwargs if k in kwargs}

	init_dict, unused_kwargs, _ = pipeline_class.extract_init_dict(config_dict, **kwargs)

	# define init kwargs
	init_kwargs = {k: init_dict.pop(k) for k in optional_kwargs if k in init_dict}
	init_kwargs = {init_kwargs, passed_pipe_kwargs}

	# remove `null` components
	def load_module(name, value):
	if value[0] is None:
	return False
	if name in passed_class_obj and passed_class_obj[name] is None:
	return False
	return True

	init_dict = {k: v for k, v in init_dict.items() if load_module(k, v)}

	if len(unused_kwargs) > 0:
	logger.warning(
	f"Keyword arguments {unused_kwargs} are not expected by {pipeline_class.__name__} and will be ignored."
	)

	if low_cpu_mem_usage and not is_accelerate_available():
	low_cpu_mem_usage = False
	logger.warning(
	"Cannot initialize model with low cpu memory usage because `accelerate` was not found in the"
	" environment. Defaulting to `low_cpu_mem_usage=False`. It is strongly recommended to install"
	" `accelerate` for faster and less memory-intense model loading. You can do so with: \n```\npip"
	" install accelerate\n```\n."
	)

	if device_map is not None and not is_torch_version(">=", "1.9.0"):
	raise NotImplementedError(
	"Loading and dispatching requires torch >= 1.9.0. Please either update your PyTorch version or set"
	" `device_map=None`."
	)

	if low_cpu_mem_usage is True and not is_torch_version(">=", "1.9.0"):
	raise NotImplementedError(
	"Low memory initialization requires torch >= 1.9.0. Please either update your PyTorch version or set"
	" `low_cpu_mem_usage=False`."
	)

	if low_cpu_mem_usage is False and device_map is not None:
	raise ValueError(
	f"You cannot set `low_cpu_mem_usage` to False while using device_map={device_map} for loading and"
	" dispatching. Please make sure to set `low_cpu_mem_usage=True`."
	)

	# import it here to avoid circular import
	from diffusers import pipelines

	# 3. Load each module in the pipeline
	for name, (library_name, class_name) in init_dict.items():
	# 3.1 - now that JAX/Flax is an official framework of the library, we might load from Flax names
	if class_name.startswith("Flax"):
	class_name = class_name[4:]

	is_pipeline_module = hasattr(pipelines, library_name)
	loaded_sub_model = None

	# if the model is in a pipeline module, then we load it from the pipeline
	if name in passed_class_obj:
	# 1. check that passed_class_obj has correct parent class
	if not is_pipeline_module:
	library = importlib.import_module(library_name)
	class_obj = getattr(library, class_name)
	importable_classes = LOADABLE_CLASSES[library_name]
	class_candidates = {c: getattr(library, c, None) for c in importable_classes.keys()}

	expected_class_obj = None
	for class_name, class_candidate in class_candidates.items():
	if class_candidate is not None and issubclass(class_obj, class_candidate):
	expected_class_obj = class_candidate

	if not issubclass(passed_class_obj[name].__class__, expected_class_obj):
	raise ValueError(
	f"{passed_class_obj[name]} is of type: {type(passed_class_obj[name])}, but should be"
	f" {expected_class_obj}"
	)
	else:
	logger.warning(
	f"You have passed a non-standard module {passed_class_obj[name]}. We cannot verify whether it"
	" has the correct type"
	)

	# set passed class object
	loaded_sub_model = passed_class_obj[name]
	elif is_pipeline_module:
	pipeline_module = getattr(pipelines, library_name)
	class_obj = getattr(pipeline_module, class_name)
	importable_classes = ALL_IMPORTABLE_CLASSES
	class_candidates = {c: class_obj for c in importable_classes.keys()}
	else:
	# else we just import it from the library.
	library = importlib.import_module(library_name)

	class_obj = getattr(library, class_name)
	importable_classes = LOADABLE_CLASSES[library_name]
	class_candidates = {c: getattr(library, c, None) for c in importable_classes.keys()}

	if loaded_sub_model is None:
	load_method_name = None
	for class_name, class_candidate in class_candidates.items():
	if class_candidate is not None and issubclass(class_obj, class_candidate):
	load_method_name = importable_classes[class_name][1]

	if load_method_name is None:
	none_module = class_obj.__module__
	is_dummy_path = none_module.startswith(DUMMY_MODULES_FOLDER) or none_module.startswith(
	TRANSFORMERS_DUMMY_MODULES_FOLDER
	)
	if is_dummy_path and "dummy" in none_module:
	# call class_obj for nice error message of missing requirements
	class_obj()

	raise ValueError(
	f"The component {class_obj} of {pipeline_class} cannot be loaded as it does not seem to have"
	f" any of the loading methods defined in {ALL_IMPORTABLE_CLASSES}."
	)

	load_method = getattr(class_obj, load_method_name)
	loading_kwargs = {}

	if issubclass(class_obj, torch.nn.Module):
	loading_kwargs["torch_dtype"] = torch_dtype
	if issubclass(class_obj, diffusers.OnnxRuntimeModel):
	loading_kwargs["provider"] = provider
	loading_kwargs["sess_options"] = sess_options

	is_diffusers_model = issubclass(class_obj, diffusers.ModelMixin)
	is_transformers_model = (
	is_transformers_available()
	and issubclass(class_obj, PreTrainedModel)
	and version.parse(version.parse(transformers.__version__).base_version) >= version.parse("4.20.0")
	)

	# When loading a transformers model, if the device_map is None, the weights will be initialized as opposed to diffusers.
	# To make default loading faster we set the `low_cpu_mem_usage=low_cpu_mem_usage` flag which is `True` by default.
	# This makes sure that the weights won't be initialized which significantly speeds up loading.
	if is_diffusers_model or is_transformers_model:
	loading_kwargs["device_map"] = device_map
	loading_kwargs["low_cpu_mem_usage"] = low_cpu_mem_usage

	# check if the module is in a subdirectory
	if os.path.isdir(os.path.join(cached_folder, name)):
	loaded_sub_model = load_method(os.path.join(cached_folder, name), **loading_kwargs)
	else:
	# else load from the root directory
	loaded_sub_model = load_method(cached_folder, **loading_kwargs)

	init_kwargs[name] = loaded_sub_model # UNet(...), # DiffusionSchedule(...)

	# 4. Potentially add passed objects if expected
	missing_modules = set(expected_modules) - set(init_kwargs.keys())
	passed_modules = list(passed_class_obj.keys())
	optional_modules = pipeline_class._optional_components
	if len(missing_modules) > 0 and missing_modules <= set(passed_modules + optional_modules):
	for module in missing_modules:
	init_kwargs[module] = passed_class_obj.get(module, None)
	elif len(missing_modules) > 0:
	passed_modules = set(list(init_kwargs.keys()) + list(passed_class_obj.keys())) - optional_kwargs
	raise ValueError(
	f"Pipeline {pipeline_class} expected {expected_modules}, but only {passed_modules} were passed."
	)

	# 5. Instantiate the pipeline
	model = pipeline_class(**init_kwargs)

	if return_cached_folder:
	return model, cached_folder
	return model

	@staticmethod
	def _get_signature_keys(obj):
	parameters = inspect.signature(obj.__init__).parameters
	required_parameters = {k: v for k, v in parameters.items() if v.default == inspect._empty}
	optional_parameters = set({k for k, v in parameters.items() if v.default != inspect._empty})
	expected_modules = set(required_parameters.keys()) - set(["self"])
	return expected_modules, optional_parameters

	@property
	def components(self) -> Dict[str, Any]:
	r"""

	The `self.components` property can be useful to run different pipelines with the same weights and
	configurations to not have to re-allocate memory.

	Examples:

	```py
	>>> from diffusers import (
	... StableDiffusionPipeline,
	... StableDiffusionImg2ImgPipeline,
	... StableDiffusionInpaintPipeline,
	... )

	>>> text2img = StableDiffusionPipeline.from_pretrained("runwayml/stable-diffusion-v1-5")
	>>> img2img = StableDiffusionImg2ImgPipeline(**text2img.components)
	>>> inpaint = StableDiffusionInpaintPipeline(**text2img.components)
	```

	Returns:
	A dictionaly containing all the modules needed to initialize the pipeline.
	"""
	expected_modules, optional_parameters = self._get_signature_keys(self)
	components = {
	k: getattr(self, k) for k in self.config.keys() if not k.startswith("_") and k not in optional_parameters
	}

	if set(components.keys()) != expected_modules:
	raise ValueError(
	f"{self} has been incorrectly initialized or {self.__class__} is incorrectly implemented. Expected"
	f" {expected_modules} to be defined, but {components} are defined."
	)

	return components

	@staticmethod
	def numpy_to_pil(images):
	"""
	Convert a numpy image or a batch of images to a PIL image.
	"""
	if images.ndim == 3:
	images = images[None, ...]
	images = (images * 255).round().astype("uint8")
	if images.shape[-1] == 1:
	# special case for grayscale (single channel) images
	pil_images = [Image.fromarray(image.squeeze(), mode="L") for image in images]
	else:
	pil_images = [Image.fromarray(image) for image in images]

	return pil_images

	def progress_bar(self, iterable=None, total=None):
	if not hasattr(self, "_progress_bar_config"):
	self._progress_bar_config = {}
	elif not isinstance(self._progress_bar_config, dict):
	raise ValueError(
	f"`self._progress_bar_config` should be of type `dict`, but is {type(self._progress_bar_config)}."
	)

	if iterable is not None:
	return tqdm(iterable, **self._progress_bar_config)
	elif total is not None:
	return tqdm(total=total, **self._progress_bar_config)
	else:
	raise ValueError("Either `total` or `iterable` has to be defined.")

	def set_progress_bar_config(self, **kwargs):
	self._progress_bar_config = kwargs

	def enable_xformers_memory_efficient_attention(self):
	r"""
	Enable memory efficient attention as implemented in xformers.

	When this option is enabled, you should observe lower GPU memory usage and a potential speed up at inference
	time. Speed up at training time is not guaranteed.

	Warning: When Memory Efficient Attention and Sliced attention are both enabled, the Memory Efficient Attention
	is used.
	"""
	self.set_use_memory_efficient_attention_xformers(True)

	def disable_xformers_memory_efficient_attention(self):
	r"""
	Disable memory efficient attention as implemented in xformers.
	"""
	self.set_use_memory_efficient_attention_xformers(False)

	def set_use_memory_efficient_attention_xformers(self, valid: bool) -> None:
	# Recursively walk through all the children.
	# Any children which exposes the set_use_memory_efficient_attention_xformers method
	# gets the message
	def fn_recursive_set_mem_eff(module: torch.nn.Module):
	if hasattr(module, "set_use_memory_efficient_attention_xformers"):
	module.set_use_memory_efficient_attention_xformers(valid)

	for child in module.children():
	fn_recursive_set_mem_eff(child)

	module_names, _, _ = self.extract_init_dict(dict(self.config))
	for module_name in module_names:
	module = getattr(self, module_name)
	if isinstance(module, torch.nn.Module):
	fn_recursive_set_mem_eff(module)