remove dependency for omegaconf #ref 1284

Author: kohya-ss

Diff for: README.md

@@ -167,6 +167,8 @@ The majority of scripts is licensed under ASL 2.0 (including codes from Diffuser
 
 - Training scripts can now output training settings to wandb or Tensor Board logs. Specify the `--log_config` option. PR [#1285](https://github.com/kohya-ss/sd-scripts/pull/1285)  Thanks to ccharest93, plucked, rockerBOO, and VelocityRa!
   - Some settings, such as API keys and directory specifications, are not output due to security issues.
+
+- The ControlNet training script `train_controlnet.py` for SD1.5/2.x was not working, but it has been fixed. PR [#1284](https://github.com/kohya-ss/sd-scripts/pull/1284) Thanks to sdbds!
 
 - An option `--disable_mmap_load_safetensors` is added to disable memory mapping when loading the model's .safetensors in SDXL. PR [#1266](https://github.com/kohya-ss/sd-scripts/pull/1266) Thanks to Zovjsra!
   - It seems that the model file loading is faster in the WSL environment etc.
@@ -215,6 +217,8 @@ https://github.com/kohya-ss/sd-scripts/pull/1290) Thanks to frodo821!
 - 各学習スクリプトで学習設定を wandb や Tensor Board などのログに出力できるようになりました。`--log_config` オプションを指定してください。PR [#1285](https://github.com/kohya-ss/sd-scripts/pull/1285)  ccharest93 氏、plucked 氏、rockerBOO 氏および VelocityRa 氏に感謝します。
   - API キーや各種ディレクトリ指定など、一部の設定はセキュリティ上の問題があるため出力されません。
 
+- SD1.5/2.x 用の ControlNet 学習スクリプト `train_controlnet.py` が動作しなくなっていたのが修正されました。PR [#1284](https://github.com/kohya-ss/sd-scripts/pull/1284) sdbds 氏に感謝します。
+
 - SDXL でモデルの .safetensors を読み込む際にメモリマッピングを無効化するオプション `--disable_mmap_load_safetensors` が追加されました。PR [#1266](https://github.com/kohya-ss/sd-scripts/pull/1266) Zovjsra 氏に感謝します。
   - WSL 環境等でモデルファイルの読み込みが高速化されるようです。
   - `sdxl_train.py`、`sdxl_train_network.py`、`sdxl_train_textual_inversion.py`、`sdxl_train_control_net_lllite.py` で使用可能です。

Diff for: requirements.txt

@@ -17,7 +17,6 @@ easygui==0.98.3
 toml==0.10.2
 voluptuous==0.13.1
 huggingface-hub==0.20.1
-omegaconf==2.3.0
 # for Image utils
 imagesize==1.4.1
 # for BLIP captioning

Diff for: train_controlnet.py

@@ -5,14 +5,16 @@
 import random
 import time
 from multiprocessing import Value
-from omegaconf import OmegaConf
+
+# from omegaconf import OmegaConf
 import toml
 
 from tqdm import tqdm
 
 import torch
 from library import deepspeed_utils
 from library.device_utils import init_ipex, clean_memory_on_device
+
 init_ipex()
 
 from torch.nn.parallel import DistributedDataParallel as DDP
@@ -197,7 +199,23 @@ def train(args):
             "resnet_time_scale_shift": "default",
             "projection_class_embeddings_input_dim": None,
         }
-    unet.config = OmegaConf.create(unet.config)
+    # unet.config = OmegaConf.create(unet.config)
+
+    # make unet.config iterable and accessible by attribute
+    class CustomConfig:
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+        def __getattr__(self, name):
+            if name in self.__dict__:
+                return self.__dict__[name]
+            else:
+                raise AttributeError(f"'{self.__class__.__name__}' object has no attribute '{name}'")
+
+        def __contains__(self, name):
+            return name in self.__dict__
+
+    unet.config = CustomConfig(**unet.config)
 
     controlnet = ControlNetModel.from_unet(unet)
 
@@ -230,7 +248,7 @@ def train(args):
             )
         vae.to("cpu")
         clean_memory_on_device(accelerator.device)
-        
+
         accelerator.wait_for_everyone()
 
     if args.gradient_checkpointing:
@@ -239,7 +257,7 @@ def train(args):
     # 学習に必要なクラスを準備する
     accelerator.print("prepare optimizer, data loader etc.")
 
-    trainable_params = controlnet.parameters()
+    trainable_params = list(controlnet.parameters())
 
     _, _, optimizer = train_util.get_optimizer(args, trainable_params)
 
@@ -348,7 +366,9 @@ def train(args):
         if args.log_tracker_config is not None:
             init_kwargs = toml.load(args.log_tracker_config)
         accelerator.init_trackers(
-            "controlnet_train" if args.log_tracker_name is None else args.log_tracker_name, config=train_util.get_sanitized_config_or_none(args), init_kwargs=init_kwargs
+            "controlnet_train" if args.log_tracker_name is None else args.log_tracker_name,
+            config=train_util.get_sanitized_config_or_none(args),
+            init_kwargs=init_kwargs,
         )
 
     loss_recorder = train_util.LossRecorder()
@@ -424,7 +444,9 @@ def remove_model(old_ckpt_name):
                     )
 
                 # Sample a random timestep for each image
-                timesteps, huber_c = train_util.get_timesteps_and_huber_c(args, 0, noise_scheduler.config.num_train_timesteps, noise_scheduler, b_size, latents.device)
+                timesteps, huber_c = train_util.get_timesteps_and_huber_c(
+                    args, 0, noise_scheduler.config.num_train_timesteps, noise_scheduler, b_size, latents.device
+                )
 
                 # Add noise to the latents according to the noise magnitude at each timestep
                 # (this is the forward diffusion process)
@@ -456,7 +478,9 @@ def remove_model(old_ckpt_name):
                 else:
                     target = noise
 
-                loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
+                loss = train_util.conditional_loss(
+                    noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c
+                )
                 loss = loss.mean([1, 2, 3])
 
                 loss_weights = batch["loss_weights"]  # 各sampleごとのweight