Update app.py

app.py

@@ -12,424 +12,391 @@ import warnings
 warnings.filterwarnings("ignore")
 from PIL import Image
 import numpy as np
+from utils import load_models
 from editing import get_direction, debias
 from sampling import sample_weights
 from lora_w2w import LoRAw2w
-from transformers import CLIPTextModel
-from lora_w2w import LoRAw2w
-from diffusers import AutoencoderKL, DDPMScheduler, DiffusionPipeline, UNet2DConditionModel, LMSDiscreteScheduler
-from transformers import AutoTokenizer, PretrainedConfig
-from diffusers import (
-    AutoencoderKL,
-    DDPMScheduler,
-    DiffusionPipeline,
-    DPMSolverMultistepScheduler,
-    UNet2DConditionModel,
-    PNDMScheduler, 
-    StableDiffusionPipeline
-)
 from huggingface_hub import snapshot_download
 import spaces
 
+device = gr.State()
+generator = gr.State()
+unet = gr.State()
+vae = gr.State()
+text_encoder = gr.State()
+tokenizer = gr.State()
+noise_scheduler = gr.State()
+network = gr.State()
+device = gr.State("cuda")
+
+
 models_path = snapshot_download(repo_id="Snapchat/w2w")
 
+mean = torch.load(f"{models_path}/files/mean.pt", map_location=torch.device('cpu')).bfloat16().to(device)
+std = torch.load(f"{models_path}/files/std.pt", map_location=torch.device('cpu')).bfloat16().to(device)
+v = torch.load(f"{models_path}/files/V.pt", map_location=torch.device('cpu')).bfloat16().to(device)
+proj = torch.load(f"{models_path}/files/proj_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device)
+df = torch.load(f"{models_path}/files/identity_df.pt")
+weight_dimensions = torch.load(f"{models_path}/files/weight_dimensions.pt")
+pinverse = torch.load(f"{models_path}/files/pinverse_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device)
+
+unet, vae, text_encoder, tokenizer, noise_scheduler = load_models(device)
+
+def sample_model():
+    unet.value, _, _, _, _ = load_models(device)
+    network.value = sample_weights(unet, proj, mean, std, v[:, :1000], device, factor = 1.00)
+ 
+@torch.no_grad()
 @spaces.GPU
-def load_models(device):
-    pretrained_model_name_or_path = "stablediffusionapi/realistic-vision-v51" 
-    
-    revision = None
-    rank = 1
-    weight_dtype = torch.bfloat16
-    
-    # Load scheduler, tokenizer and models.
-    pipe = StableDiffusionPipeline.from_pretrained("stablediffusionapi/realistic-vision-v51", 
-                                                torch_dtype=torch.float16,safety_checker = None,
-                                                requires_safety_checker = False).to(device)
-    noise_scheduler = pipe.scheduler
-    del pipe
-    tokenizer = AutoTokenizer.from_pretrained(
-            pretrained_model_name_or_path, subfolder="tokenizer", revision=revision
-        )
-    text_encoder = CLIPTextModel.from_pretrained(
-            pretrained_model_name_or_path, subfolder="text_encoder", revision=revision
-        )
-    vae = AutoencoderKL.from_pretrained(pretrained_model_name_or_path, subfolder="vae", revision=revision)
-    unet = UNet2DConditionModel.from_pretrained(
-            pretrained_model_name_or_path, subfolder="unet", revision=revision
-        )
-    
-    unet.requires_grad_(False)
-    unet.to(device, dtype=weight_dtype)
-    vae.requires_grad_(False)
-    
-    text_encoder.requires_grad_(False)
-    vae.requires_grad_(False)
-    vae.to(device, dtype=weight_dtype)
-    text_encoder.to(device, dtype=weight_dtype)
-    print("")
+def inference( prompt, negative_prompt, guidance_scale, ddim_steps, seed):
+    global device
+    #global generator 
+    global unet
+    global vae 
+    global text_encoder
+    global tokenizer
+    global noise_scheduler
+    generator = torch.Generator(device=device).manual_seed(seed)
+    latents = torch.randn(
+        (1, unet.in_channels, 512 // 8, 512 // 8),
+        generator = generator,
+        device = device
+    ).bfloat16()
+   
 
-    return unet, vae, text_encoder, tokenizer, noise_scheduler
+    text_input = tokenizer(prompt, padding="max_length", max_length=tokenizer.model_max_length, truncation=True, return_tensors="pt")
 
-class main():
-    def __init__(self):
-        super(main, self).__init__()
-        
-        device = "cuda"
-        mean = torch.load(f"{models_path}/files/mean.pt", map_location=torch.device('cpu')).bfloat16().to(device)
-        std = torch.load(f"{models_path}/files/std.pt", map_location=torch.device('cpu')).bfloat16().to(device)
-        v = torch.load(f"{models_path}/files/V.pt", map_location=torch.device('cpu')).bfloat16().to(device)
-        proj = torch.load(f"{models_path}/files/proj_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device)
-        df = torch.load(f"{models_path}/files/identity_df.pt")
-        weight_dimensions = torch.load(f"{models_path}/files/weight_dimensions.pt")
-        pinverse = torch.load(f"{models_path}/files/pinverse_1000pc.pt", map_location=torch.device('cpu')).bfloat16().to(device)
-
-        self.device = device
-        self.mean = mean
-        self.std = std
-        self.v = v
-        self.proj = proj
-        self.df = df
-        self.weight_dimensions = weight_dimensions
-        self.pinverse = pinverse
-        
-        self.unet, self.vae, self.text_encoder, self.tokenizer, self.noise_scheduler = load_models(self.device)
-        print(self.text_encoder.device)
-        self.network = None
-    
-        young = get_direction(df, "Young", pinverse, 1000, device)
-        young = debias(young, "Male", df, pinverse, device)
-        young = debias(young, "Pointy_Nose", df, pinverse, device)
-        young = debias(young, "Wavy_Hair", df, pinverse, device)
-        young = debias(young, "Chubby", df, pinverse, device)
-        young = debias(young, "No_Beard", df, pinverse, device)
-        young = debias(young, "Mustache", df, pinverse, device)
-        self.young = young
-    
-        pointy = get_direction(df, "Pointy_Nose", pinverse, 1000, device)
-        pointy = debias(pointy, "Young", df, pinverse, device)
-        pointy = debias(pointy, "Male", df, pinverse, device)
-        pointy = debias(pointy, "Wavy_Hair", df, pinverse, device)
-        pointy = debias(pointy, "Chubby", df, pinverse, device)
-        pointy = debias(pointy, "Heavy_Makeup", df, pinverse, device)
-        self.pointy = pointy
-    
-        wavy = get_direction(df, "Wavy_Hair", pinverse, 1000, device)
-        wavy = debias(wavy, "Young", df, pinverse, device)
-        wavy = debias(wavy, "Male", df, pinverse, device)
-        wavy = debias(wavy, "Pointy_Nose", df, pinverse, device)
-        wavy = debias(wavy, "Chubby", df, pinverse, device)
-        wavy = debias(wavy, "Heavy_Makeup", df, pinverse, device)
-        self.wavy = wavy
+    text_embeddings = text_encoder(text_input.input_ids.to(device))[0]
+
+    max_length = text_input.input_ids.shape[-1]
+    uncond_input = tokenizer(
+                            [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt"
+                        )
+    uncond_embeddings = text_encoder(uncond_input.input_ids.to(device))[0]
+    text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
+    noise_scheduler.set_timesteps(ddim_steps) 
+    latents = latents * noise_scheduler.init_noise_sigma
+    
+    for i,t in enumerate(tqdm.tqdm(noise_scheduler.timesteps)):
+        latent_model_input = torch.cat([latents] * 2)
+        latent_model_input = noise_scheduler.scale_model_input(latent_model_input, timestep=t)
+        with network:
+            noise_pred = unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample
+        #guidance
+        noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
+        noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)
+        latents = noise_scheduler.step(noise_pred, t, latents).prev_sample
+    
+    latents = 1 / 0.18215 * latents
+    image = vae.decode(latents).sample
+    image = (image / 2 + 0.5).clamp(0, 1)
+    image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0]
+
+    image = Image.fromarray((image * 255).round().astype("uint8"))
+
+    return image
+
+
+@torch.no_grad()
+@spaces.GPU
+def edit_inference(prompt, negative_prompt, guidance_scale, ddim_steps, seed, start_noise, a1, a2, a3, a4):
+    start_items()
+    global device
+    #global generator 
+    global unet
+    global vae 
+    global text_encoder
+    global tokenizer
+    global noise_scheduler
+    global young
+    global pointy
+    global wavy
+    global thick
+    
+    original_weights = network.proj.clone()
+    
+    #pad to same number of PCs
+    pcs_original = original_weights.shape[1]
+    pcs_edits = young.shape[1]
+    padding =  torch.zeros((1,pcs_original-pcs_edits)).to(device)
+    young_pad = torch.cat((young, padding), 1)
+    pointy_pad = torch.cat((pointy, padding), 1)
+    wavy_pad = torch.cat((wavy, padding), 1)
+    thick_pad = torch.cat((thick, padding), 1)
     
+
+    edited_weights = original_weights+a1*1e6*young_pad+a2*1e6*pointy_pad+a3*1e6*wavy_pad+a4*2e6*thick_pad
+   
+    generator = torch.Generator(device=device).manual_seed(seed)
+    latents = torch.randn(
+        (1, unet.in_channels, 512 // 8, 512 // 8),
+        generator = generator,
+        device = device
+    ).bfloat16()
+   
+
+    text_input = tokenizer(prompt, padding="max_length", max_length=tokenizer.model_max_length, truncation=True, return_tensors="pt")
+
+    text_embeddings = text_encoder(text_input.input_ids.to(device))[0]
+
+    max_length = text_input.input_ids.shape[-1]
+    uncond_input = tokenizer(
+                            [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt"
+                        )
+    uncond_embeddings = text_encoder(uncond_input.input_ids.to(device))[0]
+    text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
+    noise_scheduler.set_timesteps(ddim_steps) 
+    latents = latents * noise_scheduler.init_noise_sigma
     
-        thick = get_direction(df, "Bushy_Eyebrows", pinverse, 1000, device)
-        thick = debias(thick, "Male", df, pinverse, device)
-        thick = debias(thick, "Young", df, pinverse, device)
-        thick = debias(thick, "Pointy_Nose", df, pinverse, device)
-        thick = debias(thick, "Wavy_Hair", df, pinverse, device)
-        thick = debias(thick, "Mustache", df, pinverse, device)
-        thick = debias(thick, "No_Beard", df, pinverse, device)
-        thick = debias(thick, "Sideburns", df, pinverse, device)
-        thick = debias(thick, "Big_Nose", df, pinverse, device)
-        thick = debias(thick, "Big_Lips", df, pinverse, device)
-        thick = debias(thick, "Black_Hair", df, pinverse, device)
-        thick = debias(thick, "Brown_Hair", df, pinverse, device)
-        thick = debias(thick, "Pale_Skin", df, pinverse, device)
-        thick = debias(thick, "Heavy_Makeup", df, pinverse, device)
-        self.thick = thick
-
-
-
-    def sample_model(self):
-        self.unet, _, _, _, _ = load_models(self.device)
-        self.network = sample_weights(self.unet, self.proj, self.mean, self.std, self.v[:, :1000], self.device, factor = 1.00)
-            
+
  
-    @torch.no_grad()
-    @spaces.GPU
-    def inference(self, prompt, negative_prompt, guidance_scale, ddim_steps, seed):
-        device = self.device
-        generator = torch.Generator(device=device).manual_seed(seed)
-        latents = torch.randn(
-                (1, self.unet.in_channels, 512 // 8, 512 // 8),
-                generator = generator,
-                device = self.device
-            ).bfloat16()
-           
-        
-        text_input = self.tokenizer(prompt, padding="max_length", max_length=self.tokenizer.model_max_length, truncation=True, return_tensors="pt")
-        
-        text_embeddings = self.text_encoder(text_input.input_ids.to(device))[0]
-        
-        max_length = text_input.input_ids.shape[-1]
-        uncond_input = self.tokenizer(
-                                    [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt"
-                                )
-        uncond_embeddings = self.text_encoder(uncond_input.input_ids.to(device))[0]
-        text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
-        self.noise_scheduler.set_timesteps(ddim_steps) 
-        latents = latents * self.noise_scheduler.init_noise_sigma
-            
-        for i,t in enumerate(tqdm.tqdm(self.noise_scheduler.timesteps)):
-            latent_model_input = torch.cat([latents] * 2)
-            latent_model_input = self.noise_scheduler.scale_model_input(latent_model_input, timestep=t)
-            with self.network:
-                noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample
-                #guidance
-            noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
-            noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)
-            latents = noise_scheduler.step(noise_pred, t, latents).prev_sample
+    for i,t in enumerate(tqdm.tqdm(noise_scheduler.timesteps)):
+        latent_model_input = torch.cat([latents] * 2)
+        latent_model_input = noise_scheduler.scale_model_input(latent_model_input, timestep=t)
+        
+        if t>start_noise:
+            pass
+        elif t<=start_noise:
+            network.proj = torch.nn.Parameter(edited_weights)
+            network.reset()
+
+
+        with network:
+            noise_pred = unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample
             
-        latents = 1 / 0.18215 * latents
-        image = self.vae.decode(latents).sample
-        image = (image / 2 + 0.5).clamp(0, 1)
-        image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0]
-        
-        image = Image.fromarray((image * 255).round().astype("uint8"))
         
+        #guidance
+        noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
+        noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)
+        latents = noise_scheduler.step(noise_pred, t, latents).prev_sample
+    
+    latents = 1 / 0.18215 * latents
+    image = vae.decode(latents).sample
+    image = (image / 2 + 0.5).clamp(0, 1)
+
+    image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0]
+
+    image = Image.fromarray((image * 255).round().astype("uint8"))
+
+    #reset weights back to original 
+    network.proj = torch.nn.Parameter(original_weights)
+    network.reset()
+
+    return image
+
+@spaces.GPU
+def sample_then_run():
+    sample_model()    
+    prompt = "sks person"
+    negative_prompt = "low quality, blurry, unfinished, nudity, weapon"
+    seed = 5
+    cfg = 3.0
+    steps = 25
+    image = inference( prompt, negative_prompt, cfg, steps, seed)
+    torch.save(network.proj, "model.pt" )
+    return image, "model.pt"
+
+#@spaces.GPU
+def start_items():
+    print("Starting items")
+    global young
+    global pointy
+    global wavy 
+    global thick
+    young = get_direction(df, "Young", pinverse, 1000, device)
+    young = debias(young, "Male", df, pinverse, device)
+    young = debias(young, "Pointy_Nose", df, pinverse, device)
+    young = debias(young, "Wavy_Hair", df, pinverse, device)
+    young = debias(young, "Chubby", df, pinverse, device)
+    young = debias(young, "No_Beard", df, pinverse, device)
+    young = debias(young, "Mustache", df, pinverse, device)
+    
+    pointy = get_direction(df, "Pointy_Nose", pinverse, 1000, device)
+    pointy = debias(pointy, "Young", df, pinverse, device)
+    pointy = debias(pointy, "Male", df, pinverse, device)
+    pointy = debias(pointy, "Wavy_Hair", df, pinverse, device)
+    pointy = debias(pointy, "Chubby", df, pinverse, device)
+    pointy = debias(pointy, "Heavy_Makeup", df, pinverse, device)
+    
+    wavy = get_direction(df, "Wavy_Hair", pinverse, 1000, device)
+    wavy = debias(wavy, "Young", df, pinverse, device)
+    wavy = debias(wavy, "Male", df, pinverse, device)
+    wavy = debias(wavy, "Pointy_Nose", df, pinverse, device)
+    wavy = debias(wavy, "Chubby", df, pinverse, device)
+    wavy = debias(wavy, "Heavy_Makeup", df, pinverse, device)
+
+    thick = get_direction(df, "Bushy_Eyebrows", pinverse, 1000, device)
+    thick = debias(thick, "Male", df, pinverse, device)
+    thick = debias(thick, "Young", df, pinverse, device)
+    thick = debias(thick, "Pointy_Nose", df, pinverse, device)
+    thick = debias(thick, "Wavy_Hair", df, pinverse, device)
+    thick = debias(thick, "Mustache", df, pinverse, device)
+    thick = debias(thick, "No_Beard", df, pinverse, device)
+    thick = debias(thick, "Sideburns", df, pinverse, device)
+    thick = debias(thick, "Big_Nose", df, pinverse, device)
+    thick = debias(thick, "Big_Lips", df, pinverse, device)
+    thick = debias(thick, "Black_Hair", df, pinverse, device)
+    thick = debias(thick, "Brown_Hair", df, pinverse, device)
+    thick = debias(thick, "Pale_Skin", df, pinverse, device)
+    thick = debias(thick, "Heavy_Makeup", df, pinverse, device)
+
+class CustomImageDataset(Dataset):
+    def __init__(self, images, transform=None):
+        self.images = images
+        self.transform = transform
+
+    def __len__(self):
+        return len(self.images)
+
+    def __getitem__(self, idx):
+        image = self.images[idx]
+        if self.transform:
+            image = self.transform(image)
         return image
 
+@spaces.GPU
+def invert(image, mask, pcs=10000, epochs=400, weight_decay = 1e-10, lr=1e-1):
+    global unet
+    del unet
+    global network
+    unet, _, _, _, _ = load_models(device)
+    
+    proj = torch.zeros(1,pcs).bfloat16().to(device)
+    network = LoRAw2w( proj, mean, std, v[:, :pcs], 
+                        unet,
+                        rank=1,
+                        multiplier=1.0,
+                        alpha=27.0,
+                        train_method="xattn-strict"
+                    ).to(device, torch.bfloat16)
 
-    @torch.no_grad()
-    @spaces.GPU
-    def edit_inference(self, prompt, negative_prompt, guidance_scale, ddim_steps, seed, start_noise, a1, a2, a3, a4): 
-        device = self.device
-        original_weights = self,network.proj.clone()
-            
-        #pad to same number of PCs
-        pcs_original = original_weights.shape[1]
-        pcs_edits = self.young.shape[1]
-        padding =  torch.zeros((1,pcs_original-pcs_edits)).to(device)
-        young_pad = torch.cat((self.young, padding), 1)
-        pointy_pad = torch.cat((self.pointy, padding), 1)
-        wavy_pad = torch.cat((self.wavy, padding), 1)
-        thick_pad = torch.cat((self.thick, padding), 1)
-            
-        
-        edited_weights = original_weights+a1*1e6*young_pad+a2*1e6*pointy_pad+a3*1e6*wavy_pad+a4*2e6*thick_pad
-           
-        generator = torch.Generator(device=device).manual_seed(seed)
-        latents = torch.randn(
-                (1, self.unet.in_channels, 512 // 8, 512 // 8),
-                generator = generator,
-                device = self.device
-            ).bfloat16()
-           
-        
-        text_input = self.tokenizer(prompt, padding="max_length", max_length=self.tokenizer.model_max_length, truncation=True, return_tensors="pt")
-        
-        text_embeddings = text_encoder(text_input.input_ids.to(device))[0]
-        
-        max_length = text_input.input_ids.shape[-1]
-        uncond_input = tokenizer(
-                                    [negative_prompt], padding="max_length", max_length=max_length, return_tensors="pt"
-                                )
-        uncond_embeddings = text_encoder(uncond_input.input_ids.to(device))[0]
-        text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
-        noise_scheduler.set_timesteps(ddim_steps) 
-        latents = latents * noise_scheduler.init_noise_sigma
-            
-        
+    ### load mask
+    mask = transforms.Resize((64,64), interpolation=transforms.InterpolationMode.BILINEAR)(mask)
+    mask = torchvision.transforms.functional.pil_to_tensor(mask).unsqueeze(0).to(device).bfloat16()[:,0,:,:].unsqueeze(1)
+    ### check if an actual mask was draw, otherwise mask is just all ones
+    if torch.sum(mask) == 0:
+        mask = torch.ones((1,1,64,64)).to(device).bfloat16()
+        
+    ### single image dataset
+    image_transforms = transforms.Compose([transforms.Resize(512, interpolation=transforms.InterpolationMode.BILINEAR),
+                                                transforms.RandomCrop(512),
+                                                transforms.ToTensor(),
+                                                transforms.Normalize([0.5], [0.5])])
+
+
+    train_dataset = CustomImageDataset(image, transform=image_transforms)
+    train_dataloader = torch.utils.data.DataLoader(train_dataset, batch_size=1, shuffle=True) 
+
+    ### optimizer 
+    optim = torch.optim.Adam(network.parameters(), lr=lr, weight_decay=weight_decay)    
+
+    ### training loop
+    unet.train()
+    for epoch in tqdm.tqdm(range(epochs)):
+        for batch in train_dataloader:
+            ### prepare inputs
+            batch = batch.to(device).bfloat16()
+            latents = vae.encode(batch).latent_dist.sample()
+            latents = latents*0.18215
+            noise = torch.randn_like(latents)
+            bsz = latents.shape[0]
          
-        for i,t in enumerate(tqdm.tqdm(self.noise_scheduler.timesteps)):
-            latent_model_input = torch.cat([latents] * 2)
-            latent_model_input = self.noise_scheduler.scale_model_input(latent_model_input, timestep=t)
-                
-            if t>start_noise:
-                pass
-            elif t<=start_noise:
-                self.network.proj = torch.nn.Parameter(edited_weights)
-                self.network.reset()
-        
-        
-            with self.network:
-                noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=text_embeddings, timestep_cond= None).sample
-                    
-                
-            #guidance
-            noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
-            noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)
-            latents = noise_scheduler.step(noise_pred, t, latents).prev_sample
-            
-        latents = 1 / 0.18215 * latents
-        image = self.vae.decode(latents).sample
-        image = (image / 2 + 0.5).clamp(0, 1)
-        
-        image = image.detach().cpu().float().permute(0, 2, 3, 1).numpy()[0]
-        
-        image = Image.fromarray((image * 255).round().astype("uint8"))
-        
-        #reset weights back to original 
-        self.network.proj = torch.nn.Parameter(original_weights)
-        self.network.reset()
-        
-        return image
+            timesteps = torch.randint(0, noise_scheduler.config.num_train_timesteps, (bsz,), device=latents.device)
+            timesteps = timesteps.long()
+            noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps)
+            text_input = tokenizer("sks person", padding="max_length", max_length=tokenizer.model_max_length, truncation=True, return_tensors="pt")
+            text_embeddings = text_encoder(text_input.input_ids.to(device))[0]
 
-    @spaces.GPU
-    def sample_then_run(self):
-        self.sample_model()    
-        prompt = "sks person"
-        negative_prompt = "low quality, blurry, unfinished, nudity, weapon"
-        seed = 5
-        cfg = 3.0
-        steps = 25
-        image = self.inference( prompt, negative_prompt, cfg, steps, seed)
-        torch.save(self.network.proj, "model.pt" )
-        return image, "model.pt"
+            ### loss + sgd step
+            with network:
+                model_pred = unet(noisy_latents, timesteps, text_embeddings).sample
+                loss = torch.nn.functional.mse_loss(mask*model_pred.float(), mask*noise.float(), reduction="mean")
+                optim.zero_grad()
+                loss.backward()
+                optim.step()
 
+    ### return optimized network
+    return network
 
 
-    class CustomImageDataset(Dataset):
-        def __init__(self, images, transform=None):
-            self.images = images
-            self.transform = transform
-        
-        def __len__(self):
-            return len(self.images)
-        
-        def __getitem__(self, idx):
-            image = self.images[idx]
-            if self.transform:
-                image = self.transform(image)
-            return image
-        
-    @spaces.GPU
-    def invert(self, image, mask, pcs=10000, epochs=400, weight_decay = 1e-10, lr=1e-1):
-            
-        del unet
-        del network
-        unet, _, _, _, _ = load_models(device)
-            
-        proj = torch.zeros(1,pcs).bfloat16().to(device)
-        network = LoRAw2w( proj, mean, std, v[:, :pcs], 
-                                unet,
-                                rank=1,
-                                multiplier=1.0,
-                                alpha=27.0,
-                                train_method="xattn-strict"
-                            ).to(device, torch.bfloat16)
-    
-        ### load mask
-        mask = transforms.Resize((64,64), interpolation=transforms.InterpolationMode.BILINEAR)(mask)
-        mask = torchvision.transforms.functional.pil_to_tensor(mask).unsqueeze(0).to(device).bfloat16()[:,0,:,:].unsqueeze(1)
-        ### check if an actual mask was draw, otherwise mask is just all ones
-        if torch.sum(mask) == 0:
-            mask = torch.ones((1,1,64,64)).to(device).bfloat16()
-                
-        ### single image dataset
-        image_transforms = transforms.Compose([transforms.Resize(512, interpolation=transforms.InterpolationMode.BILINEAR),
-                                                        transforms.RandomCrop(512),
-                                                        transforms.ToTensor(),
-                                                        transforms.Normalize([0.5], [0.5])])
-        
-        
-        train_dataset = CustomImageDataset(image, transform=image_transforms)
-        train_dataloader = torch.utils.data.DataLoader(train_dataset, batch_size=1, shuffle=True) 
-        
-        ### optimizer 
-        optim = torch.optim.Adam(network.parameters(), lr=lr, weight_decay=weight_decay)    
-        
-        ### training loop
-        unet.train()
-        for epoch in tqdm.tqdm(range(epochs)):
-            for batch in train_dataloader:
-                ### prepare inputs
-                batch = batch.to(device).bfloat16()
-                latents = vae.encode(batch).latent_dist.sample()
-                latents = latents*0.18215
-                noise = torch.randn_like(latents)
-                bsz = latents.shape[0]
-                 
-                timesteps = torch.randint(0, noise_scheduler.config.num_train_timesteps, (bsz,), device=latents.device)
-                timesteps = timesteps.long()
-                noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps)
-                text_input = tokenizer("sks person", padding="max_length", max_length=tokenizer.model_max_length, truncation=True, return_tensors="pt")
-                text_embeddings = text_encoder(text_input.input_ids.to(device))[0]
-        
-                ### loss + sgd step
-                with network:
-                    model_pred = unet(noisy_latents, timesteps, text_embeddings).sample
-                    loss = torch.nn.functional.mse_loss(mask*model_pred.float(), mask*noise.float(), reduction="mean")
-                    optim.zero_grad()
-                    loss.backward()
-                    optim.step()
-        
-        ### return optimized network
-        return network
+@spaces.GPU
+def run_inversion(dict, pcs, epochs, weight_decay,lr):
+    global network
+    init_image = dict["image"].convert("RGB").resize((512, 512))
+    mask = dict["mask"].convert("RGB").resize((512, 512))
+    network = invert([init_image], mask, pcs, epochs, weight_decay,lr)
 
 
-    @spaces.GPU
-    def run_inversion(self, dict, pcs, epochs, weight_decay,lr):
-        init_image = dict["image"].convert("RGB").resize((512, 512))
-        mask = dict["mask"].convert("RGB").resize((512, 512))
-        network = invert([init_image], mask, pcs, epochs, weight_decay,lr)
-        
-        
-        #sample an image
-        prompt = "sks person"
-        negative_prompt = "low quality, blurry, unfinished, nudity"
-        seed = 5
-        cfg = 3.0
-        steps = 25
-        image = inference( prompt, negative_prompt, cfg, steps, seed)
-        torch.save(network.proj, "model.pt" )
-        return image, "model.pt"
+    #sample an image
+    prompt = "sks person"
+    negative_prompt = "low quality, blurry, unfinished, nudity"
+    seed = 5
+    cfg = 3.0
+    steps = 25
+    image = inference( prompt, negative_prompt, cfg, steps, seed)
+    torch.save(network.proj, "model.pt" )
+    return image, "model.pt"
     
     
-    @spaces.GPU
-    def file_upload(self, file):
-          
-        proj = torch.load(file.name).to(device)
-        
-        #pad to 10000 Principal components to keep everything consistent
-        pcs = proj.shape[1]
-        padding =  torch.zeros((1,10000-pcs)).to(device)
-        proj = torch.cat((proj, padding), 1)
-        
-        unet, _, _, _, _ = load_models(device)
-        
-        
-        network = LoRAw2w( proj, mean, std, v[:, :10000], 
-                                unet,
-                                rank=1,
-                                multiplier=1.0,
-                                alpha=27.0,
-                                train_method="xattn-strict"
-                            ).to(device, torch.bfloat16)
-                
-            
-        prompt = "sks person"
-        negative_prompt = "low quality, blurry, unfinished, nudity"
-        seed = 5
-        cfg = 3.0
-        steps = 25
-        image = inference( prompt, negative_prompt, cfg, steps, seed)
-        return image
+@spaces.GPU
+def file_upload(file):
+    global unet
+    del unet
+    global network
+    global device
+
     
     
+    proj = torch.load(file.name).to(device)
+
+    #pad to 10000 Principal components to keep everything consistent
+    pcs = proj.shape[1]
+    padding =  torch.zeros((1,10000-pcs)).to(device)
+    proj = torch.cat((proj, padding), 1)
 
+    unet, _, _, _, _ = load_models(device)
+
+
+    network = LoRAw2w( proj, mean, std, v[:, :10000], 
+                        unet,
+                        rank=1,
+                        multiplier=1.0,
+                        alpha=27.0,
+                        train_method="xattn-strict"
+                    ).to(device, torch.bfloat16)
+        
     
-intro = """
-<div style="display: flex;align-items: center;justify-content: center">
-        <h1 style="margin-left: 12px;text-align: center;margin-bottom: 7px;display: inline-block"><em>weights2weights</em> Demo</h1>
-        <h3 style="display: inline-block;margin-left: 10px;margin-top: 6px;font-weight: 500">Interpreting the Weight Space of Customized Diffusion Models</h3>
-    </div>
-    <p style="font-size: 0.95rem;margin: 0rem;line-height: 1.2em;margin-top:1em;display: inline-block">
-        <a href="https://snap-research.github.io/weights2weights/" target="_blank">Project Page</a> | <a href="https://arxiv.org/abs/2406.09413" target="_blank">Paper</a>
-         |  <a href="https://github.com/snap-research/weights2weights" target="_blank">Code</a> |
-        <a href="https://huggingface.co/spaces/Snapchat/w2w-demo?duplicate=true" target="_blank" style="
-            display: inline-block;
-        ">
-        <img style="margin-top: -1em;margin-bottom: 0em;position: absolute;" src="https://bit.ly/3CWLGkA" alt="Duplicate Space"></a>
-    </p>
-    """
+    prompt = "sks person"
+    negative_prompt = "low quality, blurry, unfinished, nudity"
+    seed = 5
+    cfg = 3.0
+    steps = 25
+    image = inference( prompt, negative_prompt, cfg, steps, seed)
+    return image
     
     
+
     
+intro = """
+<div style="display: flex;align-items: center;justify-content: center">
+    <h1 style="margin-left: 12px;text-align: center;margin-bottom: 7px;display: inline-block"><em>weights2weights</em> Demo</h1>
+    <h3 style="display: inline-block;margin-left: 10px;margin-top: 6px;font-weight: 500">Interpreting the Weight Space of Customized Diffusion Models</h3>
+</div>
+<p style="font-size: 0.95rem;margin: 0rem;line-height: 1.2em;margin-top:1em;display: inline-block">
+    <a href="https://snap-research.github.io/weights2weights/" target="_blank">Project Page</a> | <a href="https://arxiv.org/abs/2406.09413" target="_blank">Paper</a>
+     |  <a href="https://github.com/snap-research/weights2weights" target="_blank">Code</a> |
+    <a href="https://huggingface.co/spaces/Snapchat/w2w-demo?duplicate=true" target="_blank" style="
+        display: inline-block;
+    ">
+    <img style="margin-top: -1em;margin-bottom: 0em;position: absolute;" src="https://bit.ly/3CWLGkA" alt="Duplicate Space"></a>
+</p>
+"""
+
+
+
 with gr.Blocks(css="style.css") as demo:
-    model = main()    
     gr.HTML(intro)
-        
+    
     gr.Markdown("""<div style="text-align: justify;"> In this demo, you can get an identity-encoding model by sampling or inverting. To use a model previously downloaded from this demo see \"Uploading a model\" in the Advanced Options. Next, you can generate new images from it, or edit the identity encoded in the model and generate images from the edited model. We provide detailed instructions and tips at the bottom of the page.""")
     with gr.Column():
             with gr.Row():
@@ -437,26 +404,26 @@ with gr.Blocks(css="style.css") as demo:
                     gr.Markdown("""1) Either sample a new model, or upload an image (optionally draw a mask over the head) and click `invert`.""")
                     sample = gr.Button("🎲 Sample New Model")
                     input_image = gr.ImageEditor(elem_id="image_upload", type='pil', label="Reference Identity",
-                                               width=512, height=512)    
-                      
+                                           width=512, height=512)    
+                  
                     with gr.Row():
                         invert_button = gr.Button("⬆️ Invert")
-    
-    
-    
+
+
+
                 with gr.Column():
                     gr.Markdown("""2) Generate images of the sampled/inverted identity or edit the identity with the sliders and generate new images with various prompts and seeds.""")
                     gallery = gr.Image(label="Generated Image",height=512, width=512, interactive=False)
                     submit = gr.Button("Generate")
-    
-                        
+
+                    
             prompt = gr.Textbox(label="Prompt",
-                                                info="Make sure to include 'sks person'" ,
-                                                placeholder="sks person", 
-                                                value="sks person")
-                
+                                            info="Make sure to include 'sks person'" ,
+                                            placeholder="sks person", 
+                                            value="sks person")
+            
             seed = gr.Number(value=5, label="Seed", precision=0, interactive=True)
-                    
+                
             # Editing 
             with gr.Column():
                 with gr.Row():
@@ -465,8 +432,8 @@ with gr.Blocks(css="style.css") as demo:
                 with gr.Row():        
                     a3 = gr.Slider(label="- Curly Hair +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True)
                     a4 = gr.Slider(label="- Thick Eyebrows +", value=0, step=0.001, minimum=-1, maximum=1, interactive=True)
-    
-                
+
+            
             with gr.Accordion("Advanced Options", open=False):
                 with gr.Tab("Inversion"):
                     with gr.Row():     
@@ -477,65 +444,62 @@ with gr.Blocks(css="style.css") as demo:
                         weight_decay = gr.Number(value=1e-10, label="Weight Decay", interactive=True)
                 with gr.Tab("Sampling"):
                     with gr.Row():     
-                        cfg= gr.Slider(label="CFG", value=3.0, step=0.1, minimum=0, maximum=10, interactive=True)
-                        steps = gr.Slider(label="Inference Steps",  value=25, step=1, minimum=0, maximum=100, interactive=True)
+                            cfg= gr.Slider(label="CFG", value=3.0, step=0.1, minimum=0, maximum=10, interactive=True)
+                            steps = gr.Slider(label="Inference Steps",  value=25, step=1, minimum=0, maximum=100, interactive=True)
                     with gr.Row():
-                        negative_prompt = gr.Textbox(label="Negative Prompt", placeholder="low quality, blurry, unfinished, nudity, weapon", value="low quality, blurry, unfinished, nudity, weapon")
-                        injection_step = gr.Slider(label="Injection Step",  value=800, step=1, minimum=0, maximum=1000, interactive=True)
-                                
+                            negative_prompt = gr.Textbox(label="Negative Prompt", placeholder="low quality, blurry, unfinished, nudity, weapon", value="low quality, blurry, unfinished, nudity, weapon")
+                            injection_step = gr.Slider(label="Injection Step",  value=800, step=1, minimum=0, maximum=1000, interactive=True)
+                            
                 with gr.Tab("Uploading a model"):
                     gr.Markdown("""<div style="text-align: justify;">Upload a model below downloaded from this demo.""")
-    
+
                     file_input = gr.File(label="Upload Model", container=True)
-    
-         
-    
-    
+
+     
+
+
     gr.Markdown("""<div style="text-align: justify;"> After sampling a new model or inverting, you can download the model below.""")
-    
+
     with gr.Row():
         file_output = gr.File(label="Download Sampled/Inverted Model", container=True, interactive=False)
+        
+
+
+
+        invert_button.click(fn=run_inversion,
+                    inputs=[input_image, pcs, epochs, weight_decay,lr], 
+                    outputs = [input_image, file_output])
+        
             
-    
-    
-    
-        invert_button.click(fn=model.run_inversion,
-                        inputs=[input_image, pcs, epochs, weight_decay,lr], 
-                        outputs = [input_image, file_output])
-            
-                
-        sample.click(fn=model.sample_then_run, outputs=[input_image, file_output])
-            
+        sample.click(fn=sample_then_run, outputs=[input_image, file_output])
+        
         submit.click(
-                fn=model.edit_inference, inputs=[prompt, negative_prompt, cfg, steps, seed, injection_step, a1, a2, a3, a4], outputs=[gallery]
-            )
-        file_input.change(fn=model.file_upload, inputs=file_input, outputs = gallery)
-    
-    
-    
+            fn=edit_inference, inputs=[prompt, negative_prompt, cfg, steps, seed, injection_step, a1, a2, a3, a4], outputs=[gallery]
+        )
+        file_input.change(fn=file_upload, inputs=file_input, outputs = gallery)
+
+
+
     help_text1 = """
-            <b>Instructions</b>:
-            1. To get results faster without waiting in queue, you can duplicate into a private space with an A100 GPU.
-            2. To begin, you will have to get an identity-encoding model. You can either sample one from *weights2weights* space by clicking `Sample New Model` or by uploading an image and clicking `invert` to invert the identity into a model. You can optionally draw over the head to define a mask in the image for better results. Sampling a model takes around 10 seconds and inversion takes around 2 minutes. After this is done, you can optionally download this model for later use. A model can be uploaded in the \"Uploading a model\" tab in the `Advanced Options`.   
-            3. After getting a model, an image of the identity will be displayed on the right. You can sample from the model by changing seeds as well as prompts and then clicking `Generate`. Make sure to include \"sks person\" in your prompt to keep the same identity.
-            4. The identity in the model can be edited by changing the sliders for various attributes. After clicking `Generate`, you can see how the identity has changed and the effects are maintained across different seeds and prompts. 
-            """
+        <b>Instructions</b>:
+        1. To get results faster without waiting in queue, you can duplicate into a private space with an A100 GPU.
+        2. To begin, you will have to get an identity-encoding model. You can either sample one from *weights2weights* space by clicking `Sample New Model` or by uploading an image and clicking `invert` to invert the identity into a model. You can optionally draw over the head to define a mask in the image for better results. Sampling a model takes around 10 seconds and inversion takes around 2 minutes. After this is done, you can optionally download this model for later use. A model can be uploaded in the \"Uploading a model\" tab in the `Advanced Options`.   
+        3. After getting a model, an image of the identity will be displayed on the right. You can sample from the model by changing seeds as well as prompts and then clicking `Generate`. Make sure to include \"sks person\" in your prompt to keep the same identity.
+        4. The identity in the model can be edited by changing the sliders for various attributes. After clicking `Generate`, you can see how the identity has changed and the effects are maintained across different seeds and prompts. 
+        """
     help_text2 = """<b>Tips</b>:
-            1. Editing and Identity Generation
-                * If you are interested in preserving more of the image during identity-editing (i.e., where the same seed and prompt results in the same image with only the identity changed), you can play with the "Injection Step" parameter in the \"Sampling\" tab in the `Advanced Options`. During the first *n* timesteps, the original model's weights will be used, and then the edited weights will be set during the remaining steps. Values closer to 1000 will set the edited weights early, having a more pronounced effect, which may disrupt some semantics and structure of the generated image. Lower values will set the edited weights later, better preserving image context. We notice that around 600-800 tends to produce the best results. Larger values in the range (700-1000) are helpful for more global attribute changes, while smaller (400-700) can be used for more finegrained edits. Although it is not always needed.
-                * You can play around with negative prompts, number of inference steps, and CFG in the \"Sampling\" tab in the `Advanced Options` to affect the ultimate image quality.
-                * Sometimes the identity will not be perfectly consistent (e.g., there might be small variations of the face) when you use some seeds or prompts. This is a limitation of our method as well as an open-problem in personalized models. 
-            2. Inversion 
-                * To obtain the best results for inversion, upload a high resolution photo of the face with minimal occlusion. It is recommended to draw over the face and hair to define a mask. But inversion should still work generally for non-closeup face shots.
-                * For inverting a realistic photo of an identity, typically 800 epochs with lr=1e-1 and 10,000 principal components (PCs) works well. If the resulting generations have artifacted and unrealstic textures, there is probably overfitting and you may want to reduce the number of epochs or learning rate, or play with weight decay. If the generations do not look like the input photo, then you may want to increase the number of epochs.
-                * For inverting out-of-distribution identities, such as artistic renditions of people or non-humans (e.g. the ones shown in the paper), it is recommended to use 1000 PCs, lr=1, and train for 800 epochs.
-                * Note that if you change the number of PCs, you will probably need to change the learning rate. For less PCs, higher learning rates are typically required.""" 
+        1. Editing and Identity Generation
+            * If you are interested in preserving more of the image during identity-editing (i.e., where the same seed and prompt results in the same image with only the identity changed), you can play with the "Injection Step" parameter in the \"Sampling\" tab in the `Advanced Options`. During the first *n* timesteps, the original model's weights will be used, and then the edited weights will be set during the remaining steps. Values closer to 1000 will set the edited weights early, having a more pronounced effect, which may disrupt some semantics and structure of the generated image. Lower values will set the edited weights later, better preserving image context. We notice that around 600-800 tends to produce the best results. Larger values in the range (700-1000) are helpful for more global attribute changes, while smaller (400-700) can be used for more finegrained edits. Although it is not always needed.
+            * You can play around with negative prompts, number of inference steps, and CFG in the \"Sampling\" tab in the `Advanced Options` to affect the ultimate image quality.
+            * Sometimes the identity will not be perfectly consistent (e.g., there might be small variations of the face) when you use some seeds or prompts. This is a limitation of our method as well as an open-problem in personalized models. 
+        2. Inversion 
+            * To obtain the best results for inversion, upload a high resolution photo of the face with minimal occlusion. It is recommended to draw over the face and hair to define a mask. But inversion should still work generally for non-closeup face shots.
+            * For inverting a realistic photo of an identity, typically 800 epochs with lr=1e-1 and 10,000 principal components (PCs) works well. If the resulting generations have artifacted and unrealstic textures, there is probably overfitting and you may want to reduce the number of epochs or learning rate, or play with weight decay. If the generations do not look like the input photo, then you may want to increase the number of epochs.
+            * For inverting out-of-distribution identities, such as artistic renditions of people or non-humans (e.g. the ones shown in the paper), it is recommended to use 1000 PCs, lr=1, and train for 800 epochs.
+            * Note that if you change the number of PCs, you will probably need to change the learning rate. For less PCs, higher learning rates are typically required.""" 
+    
         
-            
     gr.Markdown(help_text1)
     gr.Markdown(help_text2)
-        
+    #demo.load(fn=start_items)
 demo.queue().launch()
-
-
-