Patch release: v0.15.1

* Better deprecation message

* Better deprecation message

* Better doc string

* Fixes

* fix more

* fix more

* Improve __getattr__

* correct more

* fix more

* fix

* Improve more

* more improvements

* fix more

* Apply suggestions from code review

Co-authored-by: Pedro Cuenca <pedro@huggingface.co>

* make style

* Fix all rest & add tests & remove old deprecation fns

---------

Co-authored-by: Pedro Cuenca <pedro@huggingface.co>

examples/community/unclip_image_interpolation.py

@@ -372,9 +372,9 @@ class UnCLIPImageInterpolationPipeline(DiffusionPipeline):
         self.decoder_scheduler.set_timesteps(decoder_num_inference_steps, device=device)
         decoder_timesteps_tensor = self.decoder_scheduler.timesteps
 
-        num_channels_latents = self.decoder.in_channels
-        height = self.decoder.sample_size
-        width = self.decoder.sample_size
+        num_channels_latents = self.decoder.config.in_channels
+        height = self.decoder.config.sample_size
+        width = self.decoder.config.sample_size
 
         decoder_latents = self.prepare_latents(
             (batch_size, num_channels_latents, height, width),
@@ -425,9 +425,9 @@ class UnCLIPImageInterpolationPipeline(DiffusionPipeline):
         self.super_res_scheduler.set_timesteps(super_res_num_inference_steps, device=device)
         super_res_timesteps_tensor = self.super_res_scheduler.timesteps
 
-        channels = self.super_res_first.in_channels // 2
-        height = self.super_res_first.sample_size
-        width = self.super_res_first.sample_size
+        channels = self.super_res_first.config.in_channels // 2
+        height = self.super_res_first.config.sample_size
+        width = self.super_res_first.config.sample_size
 
         super_res_latents = self.prepare_latents(
             (batch_size, channels, height, width),

examples/community/unclip_text_interpolation.py

@@ -452,9 +452,9 @@ class UnCLIPTextInterpolationPipeline(DiffusionPipeline):
         self.decoder_scheduler.set_timesteps(decoder_num_inference_steps, device=device)
         decoder_timesteps_tensor = self.decoder_scheduler.timesteps
 
-        num_channels_latents = self.decoder.in_channels
-        height = self.decoder.sample_size
-        width = self.decoder.sample_size
+        num_channels_latents = self.decoder.config.in_channels
+        height = self.decoder.config.sample_size
+        width = self.decoder.config.sample_size
 
         decoder_latents = self.prepare_latents(
             (batch_size, num_channels_latents, height, width),
@@ -505,9 +505,9 @@ class UnCLIPTextInterpolationPipeline(DiffusionPipeline):
         self.super_res_scheduler.set_timesteps(super_res_num_inference_steps, device=device)
         super_res_timesteps_tensor = self.super_res_scheduler.timesteps
 
-        channels = self.super_res_first.in_channels // 2
-        height = self.super_res_first.sample_size
-        width = self.super_res_first.sample_size
+        channels = self.super_res_first.config.in_channels // 2
+        height = self.super_res_first.config.sample_size
+        width = self.super_res_first.config.sample_size
 
         super_res_latents = self.prepare_latents(
             (batch_size, channels, height, width),

setup.py

@@ -226,7 +226,7 @@ install_requires = [
 
 setup(
     name="diffusers",
-    version="0.15.0",  # expected format is one of x.y.z.dev0, or x.y.z.rc1 or x.y.z (no to dashes, yes to dots)
+    version="0.15.1",  # expected format is one of x.y.z.dev0, or x.y.z.rc1 or x.y.z (no to dashes, yes to dots)
     description="Diffusers",
     long_description=open("README.md", "r", encoding="utf-8").read(),
     long_description_content_type="text/markdown",

src/diffusers/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "0.15.0"
+__version__ = "0.15.1"
 
 from .configuration_utils import ConfigMixin
 from .utils import (

src/diffusers/configuration_utils.py

@@ -118,6 +118,24 @@ class ConfigMixin:
 
         self._internal_dict = FrozenDict(internal_dict)
 
+    def __getattr__(self, name: str) -> Any:
+        """The only reason we overwrite `getattr` here is to gracefully deprecate accessing
+        config attributes directly. See https://github.com/huggingface/diffusers/pull/3129
+
+        Tihs funtion is mostly copied from PyTorch's __getattr__ overwrite:
+        https://pytorch.org/docs/stable/_modules/torch/nn/modules/module.html#Module
+        """
+
+        is_in_config = "_internal_dict" in self.__dict__ and hasattr(self.__dict__["_internal_dict"], name)
+        is_attribute = name in self.__dict__
+
+        if is_in_config and not is_attribute:
+            deprecation_message = f"Accessing config attribute `{name}` directly via '{type(self).__name__}' object attribute is deprecated. Please access '{name}' over '{type(self).__name__}'s config object instead, e.g. 'scheduler.config.{name}'."
+            deprecate("direct config name access", "1.0.0", deprecation_message, standard_warn=False)
+            return self._internal_dict[name]
+
+        raise AttributeError(f"'{type(self).__name__}' object has no attribute '{name}'")
+
     def save_config(self, save_directory: Union[str, os.PathLike], push_to_hub: bool = False, **kwargs):
         """
         Save a configuration object to the directory `save_directory`, so that it can be re-loaded using the

src/diffusers/models/autoencoder_kl.py

@@ -18,7 +18,7 @@ import torch
 import torch.nn as nn
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput, apply_forward_hook, deprecate
+from ..utils import BaseOutput, apply_forward_hook
 from .modeling_utils import ModelMixin
 from .vae import Decoder, DecoderOutput, DiagonalGaussianDistribution, Encoder
 
@@ -123,16 +123,6 @@ class AutoencoderKL(ModelMixin, ConfigMixin):
         self.tile_latent_min_size = int(sample_size / (2 ** (len(self.config.block_out_channels) - 1)))
         self.tile_overlap_factor = 0.25
 
-    @property
-    def block_out_channels(self):
-        deprecate(
-            "block_out_channels",
-            "1.0.0",
-            "Accessing `block_out_channels` directly via vae.block_out_channels is deprecated. Please use `vae.config.block_out_channels instead`",
-            standard_warn=False,
-        )
-        return self.config.block_out_channels
-
     def _set_gradient_checkpointing(self, module, value=False):
         if isinstance(module, (Encoder, Decoder)):
             module.gradient_checkpointing = value

src/diffusers/models/controlnet.py

@@ -119,6 +119,7 @@ class ControlNetModel(ModelMixin, ConfigMixin):
         projection_class_embeddings_input_dim: Optional[int] = None,
         controlnet_conditioning_channel_order: str = "rgb",
         conditioning_embedding_out_channels: Optional[Tuple[int]] = (16, 32, 96, 256),
+        global_pool_conditions: bool = False,
     ):
         super().__init__()
 
@@ -559,6 +560,12 @@ class ControlNetModel(ModelMixin, ConfigMixin):
         down_block_res_samples = [sample * conditioning_scale for sample in down_block_res_samples]
         mid_block_res_sample *= conditioning_scale
 
+        if self.config.global_pool_conditions:
+            down_block_res_samples = [
+                torch.mean(sample, dim=(2, 3), keepdim=True) for sample in down_block_res_samples
+            ]
+            mid_block_res_sample = torch.mean(mid_block_res_sample, dim=(2, 3), keepdim=True)
+
         if not return_dict:
             return (down_block_res_samples, mid_block_res_sample)
 

src/diffusers/models/modeling_utils.py

@@ -17,7 +17,7 @@
 import inspect
 import os
 from functools import partial
-from typing import Callable, List, Optional, Tuple, Union
+from typing import Any, Callable, List, Optional, Tuple, Union
 
 import torch
 from torch import Tensor, device
@@ -32,6 +32,7 @@ from ..utils import (
     WEIGHTS_NAME,
     _add_variant,
     _get_model_file,
+    deprecate,
     is_accelerate_available,
     is_safetensors_available,
     is_torch_version,
@@ -156,6 +157,24 @@ class ModelMixin(torch.nn.Module):
     def __init__(self):
         super().__init__()
 
+    def __getattr__(self, name: str) -> Any:
+        """The only reason we overwrite `getattr` here is to gracefully deprecate accessing
+        config attributes directly. See https://github.com/huggingface/diffusers/pull/3129 We need to overwrite
+        __getattr__ here in addition so that we don't trigger `torch.nn.Module`'s __getattr__':
+        https://pytorch.org/docs/stable/_modules/torch/nn/modules/module.html#Module
+        """
+
+        is_in_config = "_internal_dict" in self.__dict__ and hasattr(self.__dict__["_internal_dict"], name)
+        is_attribute = name in self.__dict__
+
+        if is_in_config and not is_attribute:
+            deprecation_message = f"Accessing config attribute `{name}` directly via '{type(self).__name__}' object attribute is deprecated. Please access '{name}' over '{type(self).__name__}'s config object instead, e.g. 'unet.config.{name}'."
+            deprecate("direct config name access", "1.0.0", deprecation_message, standard_warn=False, stacklevel=3)
+            return self._internal_dict[name]
+
+        # call PyTorch's https://pytorch.org/docs/stable/_modules/torch/nn/modules/module.html#Module
+        return super().__getattr__(name)
+
     @property
     def is_gradient_checkpointing(self) -> bool:
         """

src/diffusers/models/unet_1d.py

@@ -19,7 +19,7 @@ import torch
 import torch.nn as nn
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput, deprecate
+from ..utils import BaseOutput
 from .embeddings import GaussianFourierProjection, TimestepEmbedding, Timesteps
 from .modeling_utils import ModelMixin
 from .unet_1d_blocks import get_down_block, get_mid_block, get_out_block, get_up_block
@@ -190,16 +190,6 @@ class UNet1DModel(ModelMixin, ConfigMixin):
             fc_dim=block_out_channels[-1] // 4,
         )
 
-    @property
-    def in_channels(self):
-        deprecate(
-            "in_channels",
-            "1.0.0",
-            "Accessing `in_channels` directly via unet.in_channels is deprecated. Please use `unet.config.in_channels` instead",
-            standard_warn=False,
-        )
-        return self.config.in_channels
-
     def forward(
         self,
         sample: torch.FloatTensor,

src/diffusers/models/unet_2d.py

@@ -18,7 +18,7 @@ import torch
 import torch.nn as nn
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput, deprecate
+from ..utils import BaseOutput
 from .embeddings import GaussianFourierProjection, TimestepEmbedding, Timesteps
 from .modeling_utils import ModelMixin
 from .unet_2d_blocks import UNetMidBlock2D, get_down_block, get_up_block
@@ -216,16 +216,6 @@ class UNet2DModel(ModelMixin, ConfigMixin):
         self.conv_act = nn.SiLU()
         self.conv_out = nn.Conv2d(block_out_channels[0], out_channels, kernel_size=3, padding=1)
 
-    @property
-    def in_channels(self):
-        deprecate(
-            "in_channels",
-            "1.0.0",
-            "Accessing `in_channels` directly via unet.in_channels is deprecated. Please use `unet.config.in_channels` instead",
-            standard_warn=False,
-        )
-        return self.config.in_channels
-
     def forward(
         self,
         sample: torch.FloatTensor,

src/diffusers/models/unet_2d_condition.py

@@ -21,7 +21,7 @@ import torch.utils.checkpoint
 
 from ..configuration_utils import ConfigMixin, register_to_config
 from ..loaders import UNet2DConditionLoadersMixin
-from ..utils import BaseOutput, deprecate, logging
+from ..utils import BaseOutput, logging
 from .attention_processor import AttentionProcessor, AttnProcessor
 from .embeddings import GaussianFourierProjection, TimestepEmbedding, Timesteps
 from .modeling_utils import ModelMixin
@@ -447,16 +447,6 @@ class UNet2DConditionModel(ModelMixin, ConfigMixin, UNet2DConditionLoadersMixin)
             block_out_channels[0], out_channels, kernel_size=conv_out_kernel, padding=conv_out_padding
         )
 
-    @property
-    def in_channels(self):
-        deprecate(
-            "in_channels",
-            "1.0.0",
-            "Accessing `in_channels` directly via unet.in_channels is deprecated. Please use `unet.config.in_channels` instead",
-            standard_warn=False,
-        )
-        return self.config.in_channels
-
     @property
     def attn_processors(self) -> Dict[str, AttentionProcessor]:
         r"""

src/diffusers/pipelines/alt_diffusion/pipeline_alt_diffusion_img2img.py

@@ -503,7 +503,7 @@ class AltDiffusionImg2ImgPipeline(DiffusionPipeline, TextualInversionLoaderMixin
         init_timestep = min(int(num_inference_steps * strength), num_inference_steps)
 
         t_start = max(num_inference_steps - init_timestep, 0)
-        timesteps = self.scheduler.timesteps[t_start:]
+        timesteps = self.scheduler.timesteps[t_start * self.scheduler.order :]
 
         return timesteps, num_inference_steps - t_start
 

src/diffusers/pipelines/pipeline_utils.py

@@ -507,7 +507,7 @@ class DiffusionPipeline(ConfigMixin):
             setattr(self, name, module)
 
     def __setattr__(self, name: str, value: Any):
-        if hasattr(self, name) and hasattr(self.config, name):
+        if name in self.__dict__ and hasattr(self.config, name):
             # We need to overwrite the config if name exists in config
             if isinstance(getattr(self.config, name), (tuple, list)):
                 if value is not None and self.config[name][0] is not None:
@@ -635,12 +635,11 @@ class DiffusionPipeline(ConfigMixin):
             )
 
         module_names, _ = self._get_signature_keys(self)
-        module_names = [m for m in module_names if hasattr(self, m)]
+        modules = [getattr(self, n, None) for n in module_names]
+        modules = [m for m in modules if isinstance(m, torch.nn.Module)]
 
         is_offloaded = pipeline_is_offloaded or pipeline_is_sequentially_offloaded
-        for name in module_names:
-            module = getattr(self, name)
-            if isinstance(module, torch.nn.Module):
+        for module in modules:
             module.to(torch_device, torch_dtype)
             if (
                 module.dtype == torch.float16
@@ -664,12 +663,12 @@ class DiffusionPipeline(ConfigMixin):
             `torch.device`: The torch device on which the pipeline is located.
         """
         module_names, _ = self._get_signature_keys(self)
-        module_names = [m for m in module_names if hasattr(self, m)]
+        modules = [getattr(self, n, None) for n in module_names]
+        modules = [m for m in modules if isinstance(m, torch.nn.Module)]
 
-        for name in module_names:
-            module = getattr(self, name)
-            if isinstance(module, torch.nn.Module):
+        for module in modules:
             return module.device
+
         return torch.device("cpu")
 
     @classmethod
@@ -1438,12 +1437,11 @@ class DiffusionPipeline(ConfigMixin):
             for child in module.children():
                 fn_recursive_set_mem_eff(child)
 
-        module_names, _, _ = self.extract_init_dict(dict(self.config))
-        module_names = [m for m in module_names if hasattr(self, m)]
+        module_names, _ = self._get_signature_keys(self)
+        modules = [getattr(self, n, None) for n in module_names]
+        modules = [m for m in modules if isinstance(m, torch.nn.Module)]
 
-        for module_name in module_names:
-            module = getattr(self, module_name)
-            if isinstance(module, torch.nn.Module):
+        for module in modules:
             fn_recursive_set_mem_eff(module)
 
     def enable_attention_slicing(self, slice_size: Optional[Union[str, int]] = "auto"):
@@ -1471,10 +1469,9 @@ class DiffusionPipeline(ConfigMixin):
         self.enable_attention_slicing(None)
 
     def set_attention_slice(self, slice_size: Optional[int]):
-        module_names, _, _ = self.extract_init_dict(dict(self.config))
-        module_names = [m for m in module_names if hasattr(self, m)]
+        module_names, _ = self._get_signature_keys(self)
+        modules = [getattr(self, n, None) for n in module_names]
+        modules = [m for m in modules if isinstance(m, torch.nn.Module) and hasattr(m, "set_attention_slice")]
 
-        for module_name in module_names:
-            module = getattr(self, module_name)
-            if isinstance(module, torch.nn.Module) and hasattr(module, "set_attention_slice"):
+        for module in modules:
             module.set_attention_slice(slice_size)

src/diffusers/pipelines/stable_diffusion/pipeline_cycle_diffusion.py

@@ -528,7 +528,7 @@ class CycleDiffusionPipeline(DiffusionPipeline, TextualInversionLoaderMixin):
         init_timestep = min(int(num_inference_steps * strength), num_inference_steps)
 
         t_start = max(num_inference_steps - init_timestep, 0)
-        timesteps = self.scheduler.timesteps[t_start:]
+        timesteps = self.scheduler.timesteps[t_start * self.scheduler.order :]
 
         return timesteps, num_inference_steps - t_start
 

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_depth2img.py

@@ -390,7 +390,7 @@ class StableDiffusionDepth2ImgPipeline(DiffusionPipeline, TextualInversionLoader
         init_timestep = min(int(num_inference_steps * strength), num_inference_steps)
 
         t_start = max(num_inference_steps - init_timestep, 0)
-        timesteps = self.scheduler.timesteps[t_start:]
+        timesteps = self.scheduler.timesteps[t_start * self.scheduler.order :]
 
         return timesteps, num_inference_steps - t_start
 

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_img2img.py

@@ -511,7 +511,7 @@ class StableDiffusionImg2ImgPipeline(DiffusionPipeline, TextualInversionLoaderMi
         init_timestep = min(int(num_inference_steps * strength), num_inference_steps)
 
         t_start = max(num_inference_steps - init_timestep, 0)
-        timesteps = self.scheduler.timesteps[t_start:]
+        timesteps = self.scheduler.timesteps[t_start * self.scheduler.order :]
 
         return timesteps, num_inference_steps - t_start
 

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_inpaint_legacy.py

@@ -507,7 +507,7 @@ class StableDiffusionInpaintPipelineLegacy(DiffusionPipeline, TextualInversionLo
         init_timestep = min(int(num_inference_steps * strength), num_inference_steps)
 
         t_start = max(num_inference_steps - init_timestep, 0)
-        timesteps = self.scheduler.timesteps[t_start:]
+        timesteps = self.scheduler.timesteps[t_start * self.scheduler.order :]
 
         return timesteps, num_inference_steps - t_start
 

src/diffusers/pipelines/stable_diffusion/safety_checker.py

@@ -85,6 +85,9 @@ class StableDiffusionSafetyChecker(PreTrainedModel):
 
         for idx, has_nsfw_concept in enumerate(has_nsfw_concepts):
             if has_nsfw_concept:
+                if torch.is_tensor(images) or torch.is_tensor(images[0]):
+                    images[idx] = torch.zeros_like(images[idx])  # black image
+                else:
                     images[idx] = np.zeros(images[idx].shape)  # black image
 
         if any(has_nsfw_concepts):

src/diffusers/pipelines/text_to_video_synthesis/pipeline_text_to_video_zero.py

@@ -441,7 +441,7 @@ class TextToVideoZeroPipeline(StableDiffusionPipeline):
         timesteps = self.scheduler.timesteps
 
         # Prepare latent variables
-        num_channels_latents = self.unet.in_channels
+        num_channels_latents = self.unet.config.in_channels
         latents = self.prepare_latents(
             batch_size * num_videos_per_prompt,
             num_channels_latents,

src/diffusers/pipelines/unclip/pipeline_unclip.py

@@ -413,9 +413,9 @@ class UnCLIPPipeline(DiffusionPipeline):
         self.decoder_scheduler.set_timesteps(decoder_num_inference_steps, device=device)
         decoder_timesteps_tensor = self.decoder_scheduler.timesteps
 
-        num_channels_latents = self.decoder.in_channels
-        height = self.decoder.sample_size
-        width = self.decoder.sample_size
+        num_channels_latents = self.decoder.config.in_channels
+        height = self.decoder.config.sample_size
+        width = self.decoder.config.sample_size
 
         decoder_latents = self.prepare_latents(
             (batch_size, num_channels_latents, height, width),
@@ -466,9 +466,9 @@ class UnCLIPPipeline(DiffusionPipeline):
         self.super_res_scheduler.set_timesteps(super_res_num_inference_steps, device=device)
         super_res_timesteps_tensor = self.super_res_scheduler.timesteps
 
-        channels = self.super_res_first.in_channels // 2
-        height = self.super_res_first.sample_size
-        width = self.super_res_first.sample_size
+        channels = self.super_res_first.config.in_channels // 2
+        height = self.super_res_first.config.sample_size
+        width = self.super_res_first.config.sample_size
 
         super_res_latents = self.prepare_latents(
             (batch_size, channels, height, width),

src/diffusers/pipelines/unclip/pipeline_unclip_image_variation.py

@@ -339,9 +339,9 @@ class UnCLIPImageVariationPipeline(DiffusionPipeline):
         self.decoder_scheduler.set_timesteps(decoder_num_inference_steps, device=device)
         decoder_timesteps_tensor = self.decoder_scheduler.timesteps
 
-        num_channels_latents = self.decoder.in_channels
-        height = self.decoder.sample_size
-        width = self.decoder.sample_size
+        num_channels_latents = self.decoder.config.in_channels
+        height = self.decoder.config.sample_size
+        width = self.decoder.config.sample_size
 
         if decoder_latents is None:
             decoder_latents = self.prepare_latents(
@@ -393,9 +393,9 @@ class UnCLIPImageVariationPipeline(DiffusionPipeline):
         self.super_res_scheduler.set_timesteps(super_res_num_inference_steps, device=device)
         super_res_timesteps_tensor = self.super_res_scheduler.timesteps
 
-        channels = self.super_res_first.in_channels // 2
-        height = self.super_res_first.sample_size
-        width = self.super_res_first.sample_size
+        channels = self.super_res_first.config.in_channels // 2
+        height = self.super_res_first.config.sample_size
+        width = self.super_res_first.config.sample_size
 
         if super_res_latents is None:
             super_res_latents = self.prepare_latents(

src/diffusers/pipelines/versatile_diffusion/modeling_text_unet.py

@@ -18,7 +18,7 @@ from ...models.dual_transformer_2d import DualTransformer2DModel
 from ...models.embeddings import GaussianFourierProjection, TimestepEmbedding, Timesteps
 from ...models.transformer_2d import Transformer2DModel
 from ...models.unet_2d_condition import UNet2DConditionOutput
-from ...utils import deprecate, logging
+from ...utils import logging
 
 
 logger = logging.get_logger(__name__)  # pylint: disable=invalid-name
@@ -544,19 +544,6 @@ class UNetFlatConditionModel(ModelMixin, ConfigMixin):
             block_out_channels[0], out_channels, kernel_size=conv_out_kernel, padding=conv_out_padding
         )
 
-    @property
-    def in_channels(self):
-        deprecate(
-            "in_channels",
-            "1.0.0",
-            (
-                "Accessing `in_channels` directly via unet.in_channels is deprecated. Please use"
-                " `unet.config.in_channels` instead"
-            ),
-            standard_warn=False,
-        )
-        return self.config.in_channels
-
     @property
     def attn_processors(self) -> Dict[str, AttentionProcessor]:
         r"""

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_dual_guided.py

@@ -533,7 +533,7 @@ class VersatileDiffusionDualGuidedPipeline(DiffusionPipeline):
         timesteps = self.scheduler.timesteps
 
         # 5. Prepare latent variables
-        num_channels_latents = self.image_unet.in_channels
+        num_channels_latents = self.image_unet.config.in_channels
         latents = self.prepare_latents(
             batch_size * num_images_per_prompt,
             num_channels_latents,

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_image_variation.py

@@ -378,7 +378,7 @@ class VersatileDiffusionImageVariationPipeline(DiffusionPipeline):
         timesteps = self.scheduler.timesteps
 
         # 5. Prepare latent variables
-        num_channels_latents = self.image_unet.in_channels
+        num_channels_latents = self.image_unet.config.in_channels
         latents = self.prepare_latents(
             batch_size * num_images_per_prompt,
             num_channels_latents,

src/diffusers/pipelines/versatile_diffusion/pipeline_versatile_diffusion_text_to_image.py

@@ -452,7 +452,7 @@ class VersatileDiffusionTextToImagePipeline(DiffusionPipeline):
         timesteps = self.scheduler.timesteps
 
         # 5. Prepare latent variables
-        num_channels_latents = self.image_unet.in_channels
+        num_channels_latents = self.image_unet.config.in_channels
         latents = self.prepare_latents(
             batch_size * num_images_per_prompt,
             num_channels_latents,

src/diffusers/schedulers/scheduling_ddpm.py

@@ -22,7 +22,7 @@ import numpy as np
 import torch
 
 from ..configuration_utils import ConfigMixin, register_to_config
-from ..utils import BaseOutput, deprecate, randn_tensor
+from ..utils import BaseOutput, randn_tensor
 from .scheduling_utils import KarrasDiffusionSchedulers, SchedulerMixin
 
 
@@ -167,16 +167,6 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin):
 
         self.variance_type = variance_type
 
-    @property
-    def num_train_timesteps(self):
-        deprecate(
-            "num_train_timesteps",
-            "1.0.0",
-            "Accessing `num_train_timesteps` directly via scheduler.num_train_timesteps is deprecated. Please use `scheduler.config.num_train_timesteps instead`",
-            standard_warn=False,
-        )
-        return self.config.num_train_timesteps
-
     def scale_model_input(self, sample: torch.FloatTensor, timestep: Optional[int] = None) -> torch.FloatTensor:
         """
         Ensures interchangeability with schedulers that need to scale the denoising model input depending on the

src/diffusers/utils/deprecation_utils.py

@@ -5,7 +5,7 @@ from typing import Any, Dict, Optional, Union
 from packaging import version
 
 
-def deprecate(*args, take_from: Optional[Union[Dict, Any]] = None, standard_warn=True):
+def deprecate(*args, take_from: Optional[Union[Dict, Any]] = None, standard_warn=True, stacklevel=2):
     from .. import __version__
 
     deprecated_kwargs = take_from
@@ -32,7 +32,7 @@ def deprecate(*args, take_from: Optional[Union[Dict, Any]] = None, standard_warn
 
         if warning is not None:
             warning = warning + " " if standard_warn else ""
-            warnings.warn(warning + message, FutureWarning, stacklevel=2)
+            warnings.warn(warning + message, FutureWarning, stacklevel=stacklevel)
 
     if isinstance(deprecated_kwargs, dict) and len(deprecated_kwargs) > 0:
         call_frame = inspect.getouterframes(inspect.currentframe())[1]

tests/pipelines/stable_diffusion/test_stable_diffusion_img2img.py

@@ -25,6 +25,7 @@ from diffusers import (
     AutoencoderKL,
     DDIMScheduler,
     DPMSolverMultistepScheduler,
+    HeunDiscreteScheduler,
     LMSDiscreteScheduler,
     PNDMScheduler,
     StableDiffusionImg2ImgPipeline,
@@ -416,6 +417,33 @@ class StableDiffusionImg2ImgPipelineSlowTests(unittest.TestCase):
         for module in pipe.text_encoder, pipe.unet, pipe.vae:
             assert module.device == torch.device("cpu")
 
+    def test_img2img_2nd_order(self):
+        sd_pipe = StableDiffusionImg2ImgPipeline.from_pretrained("runwayml/stable-diffusion-v1-5")
+        sd_pipe.scheduler = HeunDiscreteScheduler.from_config(sd_pipe.scheduler.config)
+        sd_pipe.to(torch_device)
+        sd_pipe.set_progress_bar_config(disable=None)
+
+        inputs = self.get_inputs(torch_device)
+        inputs["num_inference_steps"] = 10
+        inputs["strength"] = 0.75
+        image = sd_pipe(**inputs).images[0]
+
+        expected_image = load_numpy(
+            "https://huggingface.co/datasets/hf-internal-testing/diffusers-images/resolve/main/img2img/img2img_heun.npy"
+        )
+        max_diff = np.abs(expected_image - image).max()
+        assert max_diff < 5e-2
+
+        inputs = self.get_inputs(torch_device)
+        inputs["num_inference_steps"] = 11
+        inputs["strength"] = 0.75
+        image_other = sd_pipe(**inputs).images[0]
+
+        mean_diff = np.abs(image - image_other).mean()
+
+        # images should be very similar
+        assert mean_diff < 5e-2
+
     def test_stable_diffusion_img2img_pipeline_multiple_of_8(self):
         init_image = load_image(
             "https://huggingface.co/datasets/hf-internal-testing/diffusers-images/resolve/main"
@@ -453,6 +481,20 @@ class StableDiffusionImg2ImgPipelineSlowTests(unittest.TestCase):
 
         assert np.abs(image_slice.flatten() - expected_slice).max() < 5e-3
 
+    def test_img2img_safety_checker_works(self):
+        sd_pipe = StableDiffusionImg2ImgPipeline.from_pretrained("runwayml/stable-diffusion-v1-5")
+        sd_pipe.to(torch_device)
+        sd_pipe.set_progress_bar_config(disable=None)
+
+        inputs = self.get_inputs(torch_device)
+        inputs["num_inference_steps"] = 20
+        # make sure the safety checker is activated
+        inputs["prompt"] = "naked, sex, porn"
+        out = sd_pipe(**inputs)
+
+        assert out.nsfw_content_detected[0], f"Safety checker should work for prompt: {inputs['prompt']}"
+        assert np.abs(out.images[0]).sum() < 1e-5  # should be all zeros
+
 
 @nightly
 @require_torch_gpu

tests/pipelines/unclip/test_unclip.py

@@ -293,16 +293,16 @@ class UnCLIPPipelineFastTests(PipelineTesterMixin, unittest.TestCase):
         prior_latents = pipe.prepare_latents(
             shape, dtype=dtype, device=device, generator=generator, latents=None, scheduler=DummyScheduler()
         )
-        shape = (batch_size, decoder.in_channels, decoder.sample_size, decoder.sample_size)
+        shape = (batch_size, decoder.config.in_channels, decoder.config.sample_size, decoder.config.sample_size)
         decoder_latents = pipe.prepare_latents(
             shape, dtype=dtype, device=device, generator=generator, latents=None, scheduler=DummyScheduler()
         )
 
         shape = (
             batch_size,
-            super_res_first.in_channels // 2,
-            super_res_first.sample_size,
-            super_res_first.sample_size,
+            super_res_first.config.in_channels // 2,
+            super_res_first.config.sample_size,
+            super_res_first.config.sample_size,
         )
         super_res_latents = pipe.prepare_latents(
             shape, dtype=dtype, device=device, generator=generator, latents=None, scheduler=DummyScheduler()

tests/pipelines/unclip/test_unclip_image_variation.py

@@ -379,16 +379,21 @@ class UnCLIPImageVariationPipelineFastTests(PipelineTesterMixin, unittest.TestCa
         dtype = pipe.decoder.dtype
         batch_size = 1
 
-        shape = (batch_size, pipe.decoder.in_channels, pipe.decoder.sample_size, pipe.decoder.sample_size)
+        shape = (
+            batch_size,
+            pipe.decoder.config.in_channels,
+            pipe.decoder.config.sample_size,
+            pipe.decoder.config.sample_size,
+        )
         decoder_latents = pipe.prepare_latents(
             shape, dtype=dtype, device=device, generator=generator, latents=None, scheduler=DummyScheduler()
         )
 
         shape = (
             batch_size,
-            pipe.super_res_first.in_channels // 2,
-            pipe.super_res_first.sample_size,
-            pipe.super_res_first.sample_size,
+            pipe.super_res_first.config.in_channels // 2,
+            pipe.super_res_first.config.sample_size,
+            pipe.super_res_first.config.sample_size,
         )
         super_res_latents = pipe.prepare_latents(
             shape, dtype=dtype, device=device, generator=generator, latents=None, scheduler=DummyScheduler()

tests/schedulers/test_schedulers.py

@@ -596,3 +596,47 @@ class SchedulerCommonTest(unittest.TestCase):
                 new_scheduler = scheduler_class.from_pretrained(tmpdirname)
 
             assert scheduler.betas.tolist() == new_scheduler.betas.tolist()
+
+    def test_getattr_is_correct(self):
+        for scheduler_class in self.scheduler_classes:
+            scheduler_config = self.get_scheduler_config()
+            scheduler = scheduler_class(**scheduler_config)
+
+            # save some things to test
+            scheduler.dummy_attribute = 5
+            scheduler.register_to_config(test_attribute=5)
+
+            logger = logging.get_logger("diffusers.configuration_utils")
+            # 30 for warning
+            logger.setLevel(30)
+            with CaptureLogger(logger) as cap_logger:
+                assert hasattr(scheduler, "dummy_attribute")
+                assert getattr(scheduler, "dummy_attribute") == 5
+                assert scheduler.dummy_attribute == 5
+
+            # no warning should be thrown
+            assert cap_logger.out == ""
+
+            logger = logging.get_logger("diffusers.schedulers.schedulering_utils")
+            # 30 for warning
+            logger.setLevel(30)
+            with CaptureLogger(logger) as cap_logger:
+                assert hasattr(scheduler, "save_pretrained")
+                fn = scheduler.save_pretrained
+                fn_1 = getattr(scheduler, "save_pretrained")
+
+                assert fn == fn_1
+            # no warning should be thrown
+            assert cap_logger.out == ""
+
+            # warning should be thrown
+            with self.assertWarns(FutureWarning):
+                assert scheduler.test_attribute == 5
+
+            with self.assertWarns(FutureWarning):
+                assert getattr(scheduler, "test_attribute") == 5
+
+            with self.assertRaises(AttributeError) as error:
+                scheduler.does_not_exist
+
+            assert str(error.exception) == f"'{type(scheduler).__name__}' object has no attribute 'does_not_exist'"

tests/test_modeling_common.py

@@ -26,8 +26,8 @@ from requests.exceptions import HTTPError
 
 from diffusers.models import UNet2DConditionModel
 from diffusers.training_utils import EMAModel
-from diffusers.utils import torch_device
-from diffusers.utils.testing_utils import require_torch_gpu
+from diffusers.utils import logging, torch_device
+from diffusers.utils.testing_utils import CaptureLogger, require_torch_gpu
 
 
 class ModelUtilsTest(unittest.TestCase):
@@ -155,6 +155,49 @@ class ModelTesterMixin:
         max_diff = (image - new_image).abs().sum().item()
         self.assertLessEqual(max_diff, 5e-5, "Models give different forward passes")
 
+    def test_getattr_is_correct(self):
+        init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
+        model = self.model_class(**init_dict)
+
+        # save some things to test
+        model.dummy_attribute = 5
+        model.register_to_config(test_attribute=5)
+
+        logger = logging.get_logger("diffusers.models.modeling_utils")
+        # 30 for warning
+        logger.setLevel(30)
+        with CaptureLogger(logger) as cap_logger:
+            assert hasattr(model, "dummy_attribute")
+            assert getattr(model, "dummy_attribute") == 5
+            assert model.dummy_attribute == 5
+
+        # no warning should be thrown
+        assert cap_logger.out == ""
+
+        logger = logging.get_logger("diffusers.models.modeling_utils")
+        # 30 for warning
+        logger.setLevel(30)
+        with CaptureLogger(logger) as cap_logger:
+            assert hasattr(model, "save_pretrained")
+            fn = model.save_pretrained
+            fn_1 = getattr(model, "save_pretrained")
+
+            assert fn == fn_1
+        # no warning should be thrown
+        assert cap_logger.out == ""
+
+        # warning should be thrown
+        with self.assertWarns(FutureWarning):
+            assert model.test_attribute == 5
+
+        with self.assertWarns(FutureWarning):
+            assert getattr(model, "test_attribute") == 5
+
+        with self.assertRaises(AttributeError) as error:
+            model.does_not_exist
+
+        assert str(error.exception) == f"'{type(model).__name__}' object has no attribute 'does_not_exist'"
+
     def test_from_save_pretrained_variant(self):
         init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()