Update app.py

app.py

@@ -3,7 +3,7 @@ import google.generativeai as genai
 import os
 
 # -------------------------------------------------
-# 1️⃣  UI – page setup
+# 1️⃣ Page configuration
 # -------------------------------------------------
 st.set_page_config(page_title="Python Code Reviewer 🤖", layout="centered")
 st.title("🐍 Python Code Reviewer 🤖")
@@ -12,20 +12,20 @@ st.markdown(
 )
 
 # -------------------------------------------------
-# 2️⃣  Input fields
+# 2️⃣ Input fields
 # -------------------------------------------------
-# API key (optional – fallback to hard‑coded key)
+# Optional API key – falls back to the hard‑coded key
 api_key_input = st.text_input(
     "🔑 Google API Key (optional – leave blank to use the built‑in key)",
     type="password",
-    help="Enter your own Gemini API key if you have one. Otherwise the app uses the default key."
+    help="Enter your own Gemini API key if you have one; otherwise the default key is used."
 )
 
-# System prompt (optional – fallback to env var or default)
+# Optional system prompt – falls back to env var or a generic default
 sys_prompt_input = st.text_input(
     "🗒️ System Prompt (optional)",
     placeholder="e.g., 'You are a friendly Python code reviewer.'",
-    help="Custom instructions for the model. If left empty, the USER_PROMPT env var is used."
+    help="Custom instructions for the model."
 )
 
 # Code to be reviewed
@@ -43,49 +43,47 @@ prompt_box = st.text_area(
 )
 
 # -------------------------------------------------
-# 3️⃣  Main logic – run when button pressed
+# 3️⃣ Main logic (runs on button press)
 # -------------------------------------------------
 if st.button("🚀 Review"):
-    # ---- Validate input ----
+    # ---- Validate that code was provided ----
     if not code_box.strip():
         st.warning("⚠️ Please paste some Python code.")
         st.stop()
 
-    # ---- Choose API key ----
-    # User‑provided key > hard‑coded fallback
+    # ---- Choose API key (user‑provided > fallback) ----
     api_key = api_key_input.strip() or "AIzaSyBiAW2GQLid0HGe9Vs_ReKwkwsSVNegNzs"
     genai.configure(api_key=api_key)
 
-    # ---- Choose system instruction ----
-    # User input > env var > generic default
+    # ---- Choose system instruction (user input > env var > default) ----
     system_instruction = (
         sys_prompt_input.strip()
         or os.getenv("USER_PROMPT")
         or "You are a helpful Python code reviewer."
     )
 
-    # ---- Initialise model ----
+    # ---- Initialise the Gemini model ----
     model = genai.GenerativeModel(
         model_name="models/gemini-2.5-flash",
         system_instruction=system_instruction,
     )
 
-    # ---- Build the user message ----
+    # ---- Build the message sent to Gemini ----
     user_message = (
         f"Code:\n```python\n{code\_box}\n```\n\n"
         f"Task: {prompt_box or 'Review the code.'}"
     )
 
-    # ---- Call Gemini ----
+    # ---- Generate the response ----
     with st.spinner("Analyzing your code... 🧐"):
         response = model.generate_content(user_message)
 
-    # ---- Show result ----
+    # ---- Display the result ----
     st.markdown("### 🤖 Response")
     st.success(response.text)
 
 # -------------------------------------------------
-# 4️⃣  Footer
+# 4️⃣ Footer
 # -------------------------------------------------
 st.markdown("---")
 st.markdown("🛠️ **Built with Streamlit & Google Gemini AI** | ❤️ _Happy Coding!_ 🐍")