src/streamlit_app.py

def generate_code(prompt, language):

    full_prompt = f"""
You are an expert {language} programmer.

Write clean, correct, and complete code.

Requirements:
- No explanations
- Only code
- Proper syntax
- Complete function/program

Task:
{prompt}

Code:
"""

    inputs = tokenizer(full_prompt, return_tensors="pt", truncation=True)

    with torch.no_grad():
        outputs = model.generate(
            **inputs,
            max_new_tokens=300,
            do_sample=True,              # ✅ IMPORTANT
            temperature=0.2,             # ✅ slight creativity
            top_p=0.9,                   # ✅ better coherence
            repetition_penalty=1.1,      # ✅ avoid loops
            eos_token_id=tokenizer.eos_token_id,
            pad_token_id=tokenizer.eos_token_id
        )

    result = tokenizer.decode(outputs[0], skip_special_tokens=True)

    # Remove prompt part safely
    if "Code:" in result:
        result = result.split("Code:")[-1]

    return clean_code(result)