Delete main.py
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main.py
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import torch
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from safetensors.torch import save_file, load_file
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import sys
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import json
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def create_gemma_safetensors(output_file="model.safetensors", dtype=torch.bfloat16, num_heads=64, num_layers=48, image_feature_dim=2048):
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"""
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Creates a safetensors file with initialized Gemma model weights,
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including vision components for a vision-text-to-text model.
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Args:
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output_file (str): The name of the output safetensors file.
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dtype (torch.dtype): The data type of the model weights.
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num_heads (int): The number of attention heads.
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num_layers (int): The number of transformer layers.
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image_feature_dim (int): The dimension of the image features.
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"""
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tensors = {}
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embedding_dim = 5376 // 4 # reducing embedding_dim to reduce model size
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intermediate_size = 21504 // 4 # reducing intermediate_size to reduce model size
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head_dim = embedding_dim // num_heads
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# Text embedding
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tensors["language_model.model.embed_tokens.weight"] = torch.randn(262208 // 4, embedding_dim, dtype=dtype) * 0.02
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# Text layers
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for layer_idx in range(num_layers):
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layer_prefix = f"language_model.model.layers.{layer_idx}"
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tensors[f"{layer_prefix}.input_layernorm.weight"] = torch.randn(embedding_dim, dtype=dtype)
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tensors[f"{layer_prefix}.mlp.down_proj.weight"] = torch.randn(embedding_dim, intermediate_size, dtype=dtype) * (intermediate_size ** -0.5)
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tensors[f"{layer_prefix}.mlp.gate_proj.weight"] = torch.randn(intermediate_size, embedding_dim, dtype=dtype) * (embedding_dim ** -0.5)
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tensors[f"{layer_prefix}.mlp.up_proj.weight"] = torch.randn(intermediate_size, embedding_dim, dtype=dtype) * (embedding_dim ** -0.5)
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tensors[f"{layer_prefix}.post_attention_layernorm.weight"] = torch.randn(embedding_dim, dtype=dtype)
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tensors[f"{layer_prefix}.post_feedforward_layernorm.weight"] = torch.randn(embedding_dim, dtype=dtype)
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tensors[f"{layer_prefix}.pre_feedforward_layernorm.weight"] = torch.randn(embedding_dim, dtype=dtype)
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tensors[f"{layer_prefix}.self_attn.k_norm.weight"] = torch.randn(head_dim, dtype=dtype)
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tensors[f"{layer_prefix}.self_attn.k_proj.weight"] = torch.randn(head_dim * num_heads // 4, embedding_dim, dtype=dtype) * ((embedding_dim * head_dim // 4) ** -0.5)
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tensors[f"{layer_prefix}.self_attn.o_proj.weight"] = torch.randn(embedding_dim, head_dim * num_heads // 4 * 2, dtype=dtype) * ((embedding_dim * head_dim // 4 * 2) ** -0.5)
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tensors[f"{layer_prefix}.self_attn.q_norm.weight"] = torch.randn(head_dim, dtype=dtype)
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tensors[f"{layer_prefix}.self_attn.q_proj.weight"] = torch.randn(head_dim * num_heads // 4 * 2, embedding_dim, dtype=dtype) * ((embedding_dim * head_dim // 4 * 2) ** -0.5)
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tensors[f"{layer_prefix}.self_attn.v_proj.weight"] = torch.randn(head_dim * num_heads // 4, embedding_dim, dtype=dtype) * ((embedding_dim * head_dim // 4) ** -0.5)
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# Vision encoder (simplified example)
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tensors["vision_encoder.projection.weight"] = torch.randn(image_feature_dim, embedding_dim, dtype=dtype) * (image_feature_dim ** -0.5)
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tensors["vision_encoder.projection.bias"] = torch.zeros(embedding_dim, dtype=dtype)
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total_params = 0
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for tensor in tensors.values():
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total_params += tensor.numel() * tensor.element_size()
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total_params_gb = total_params / (1024 ** 3)
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print(f"Estimated total parameter size: {total_params_gb:.2f} GB ({dtype}).")
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proceed = input("Do you want to proceed and create the safetensors file? (y/n): ").lower()
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if proceed == 'y':
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save_file(tensors, output_file)
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print(f"Gemma safetensors file created: {output_file}")
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else:
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print("Safetensors file creation cancelled.")
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sys.exit()
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def analyze_model_file(model_file):
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"""
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Analyzes a safetensors model file, extracts relevant information,
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prints it to the console, and saves it to a config.json file.
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Args:
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model_file (str): The path to the safetensors model file.
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"""
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try:
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tensors = load_file(model_file, device="cpu") # Load safetensors
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config = {}
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# Extract basic information (example, adjust based on your model)
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config["architectures"] = ["Gemma3ForConditionalGeneration"] # Changed architecture
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config["model_type"] = "gemma3" # changed model_type
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config["torch_dtype"] = str(tensors["language_model.model.embed_tokens.weight"].dtype)
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# Extract dimensions (adjust based on your model's tensor names)
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config["hidden_size"] = tensors["language_model.model.embed_tokens.weight"].shape[1]
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config["num_hidden_layers"] = len(
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[key for key in tensors if "language_model.model.layers." in key]
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) // 12
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num_heads = tensors["language_model.model.layers.0.self_attn.q_proj.weight"].shape[0] // (config["hidden_size"] // 4)
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config["num_attention_heads"] = num_heads
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config["intermediate_size"] = tensors["language_model.model.layers.0.mlp.gate_proj.weight"].shape[0]
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config["head_dim"] = config["hidden_size"] // config["num_attention_heads"]
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# Add other relevant information as needed
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# Example:
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config["vocab_size"] = tensors["language_model.model.embed_tokens.weight"].shape[0]
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config["image_feature_dim"] = tensors["vision_encoder.projection.weight"].shape[0]
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# Print to console
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print(json.dumps(config, indent=2))
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# Save to config.json
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with open("config.json", "w") as f:
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json.dump(config, f, indent=2)
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print("Model analysis completed and saved to config.json")
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except FileNotFoundError:
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print(f"Error: Model file '{model_file}' not found.")
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except Exception as e:
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print(f"An error occurred during model analysis: {e}")
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if __name__ == "__main__":
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dtype_input = input("Enter the desired data type (bfloat16, float16, float32, etc.): ").lower()
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if dtype_input == "bfloat16":
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dtype = torch.bfloat16
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elif dtype_input == "float16":
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dtype = torch.float16
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elif dtype_input == "float32":
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dtype = torch.float32
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elif dtype_input == "float8":
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dtype = torch.float8_e4m3fn
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else:
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print("Invalid data type. Using bfloat16 as default.")
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dtype = torch.bfloat16
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create_gemma_safetensors(dtype=dtype)
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# Analyze the created model file
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analyze_model_file("model.safetensors")
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