Đánh giá perplexity

# Encode the input text, generate and decode it
input_text_ids = ____(input_text, return_tensors="pt")
output = ____(input_text_ids, max_length=20)
generated_text = ____(output[0], skip_special_tokens=True)

print("Generated Text: ", generated_text)

# Load and compute the perplexity score
perplexity = ____("perplexity", module_type="metric")
results = ____(model_id="gpt2", predictions=____)
print("Perplexity: ", results['mean_perplexity'])