inference.py

"""
Simple inference script for ConceptFrameMet model
"""

import torch
from transformers import RobertaTokenizer, RobertaModel
import json
import argparse


def load_model(model_path):
    """Load the ConceptFrameMet model"""
    
    # Load tokenizer
    tokenizer = RobertaTokenizer.from_pretrained(model_path)
    
    # Load model weights
    model_weights = torch.load(f"{model_path}/pytorch_model.bin", map_location='cpu')
    
    # Load config
    with open(f"{model_path}/config.json", 'r') as f:
        config = json.load(f)
    
    print(f"✓ Model loaded from {model_path}")
    print(f"  Model type: {config.get('model_type', 'roberta')}")
    
    return tokenizer, model_weights, config


def predict_metaphor(sentence, target_word, model_path, device='cpu'):
    """
    Predict if a target word is metaphorical in the given sentence
    
    Args:
        sentence: Input sentence
        target_word: Target word to analyze
        model_path: Path to model directory
        device: Device to run on ('cpu' or 'cuda')
        
    Returns:
        Dictionary with predictions
    """
    
    tokenizer, model_weights, config = load_model(model_path)
    
    # Tokenize input
    inputs = tokenizer(
        sentence,
        max_length=150,
        padding='max_length',
        truncation=True,
        return_tensors='pt'
    )
    
    # Find target word positions
    target_tokens = tokenizer.tokenize(target_word)
    sentence_tokens = tokenizer.tokenize(sentence)
    
    target_positions = []
    for i in range(len(sentence_tokens) - len(target_tokens) + 1):
        if sentence_tokens[i:i+len(target_tokens)] == target_tokens:
            # +1 for CLS token
            target_positions = list(range(i+1, i+1+len(target_tokens)))
            break
    
    if not target_positions:
        return {
            "error": "Target word not found in sentence",
            "sentence": sentence,
            "target_word": target_word
        }
    
    # Create target mask
    target_mask = torch.zeros_like(inputs['input_ids'], dtype=torch.float)
    for pos in target_positions:
        if pos < target_mask.size(1):
            target_mask[0, pos] = 1.0
    
    print(f"\n{'='*60}")
    print(f"Sentence: {sentence}")
    print(f"Target: {target_word}")
    print(f"Target positions: {target_positions}")
    print(f"{'='*60}\n")
    
    # For now, return basic info
    # Full inference requires loading the complete model architecture
    return {
        "sentence": sentence,
        "target_word": target_word,
        "target_positions": target_positions,
        "message": "Model loaded successfully. Full inference requires frame and source models.",
        "note": "This is a placeholder. Integrate with modeling_conceptframemet.py for full predictions."
    }


def main():
    parser = argparse.ArgumentParser(description='ConceptFrameMet Inference')
    parser.add_argument('--model_path', type=str, required=True, help='Path to model directory')
    parser.add_argument('--sentence', type=str, required=True, help='Input sentence')
    parser.add_argument('--target', type=str, required=True, help='Target word')
    parser.add_argument('--device', type=str, default='cpu', choices=['cpu', 'cuda'], help='Device to use')
    
    args = parser.parse_args()
    
    result = predict_metaphor(
        sentence=args.sentence,
        target_word=args.target,
        model_path=args.model_path,
        device=args.device
    )
    
    print("\nResult:")
    print(json.dumps(result, indent=2))


if __name__ == "__main__":
    main()