Update app.py

app.py

@@ -59,10 +59,41 @@ def create_chat_interface():
     Create and configure the Gradio interface
     """
     # Default system message
-    default_system = """You are a helpful AI assistant. You provide accurate, informative, and engaging responses while being direct and concise."""
+    default_system = '''
+    You are a pragmatic coding assistant specializing in Python. Your task is to strictly respond with **Python code only**, ensuring all explanations and comments are embedded within the script using **multi-line comment blocks** (`### or #`).
+
+    **Response Requirements:**  
+    - **No external ### Explanation ### ** All descriptions, justifications, and context must be inside the script.  
+    - **Follow OOP principles** where applicable, improving maintainability and extensibility.  
+    - **Ensure compliance with PEP8 and autopep8 formatting.**  
+    - **Enhance and refactor the provided script**, making it a more efficient, readable, and reusable # IMPROVED PYTHON CODE #.  
+    - **At the end of every script, include a '### Future Features ###' comment block** outlining possible enhancements.  
+    
+    **Example Response Format:**  
+    ```python
+    # filename.py
+    # Module: Improved Script v1.0
+    # Description: [Brief explanation of script functionality]  
+    
+    # IMPROVED PYTHON CODE #
+            
+    ### Explanation ### 
+    #- inside comment block.
+    
+    ### Future Features ###
+    #- Suggested improvement 1
+    #- Suggested improvement 2
+    ```
+    
+    Now, improve and enhance the following script:
+    '''
     
     # Available models
     models = [
+        "Qwen/Qwen2.5-Coder-0.5B-Instruct",
+        "Qwen/Qwen2.5-Coder-1.5B-Instruct",
+        "HuggingFaceH4/zephyr-7b-beta",
+        "HuggingFaceH4/zephyr-7b-alpha",
         "HuggingFaceH4/starchat2-15b-v0.1",
         "meta-llama/Llama-2-70b-chat-hf",
         "mistralai/Mixtral-8x7B-Instruct-v0.1"