Update Chatbot.py Add this Under Hacktoberfest 2025 (#3540)

Author: fineanmol

Python/Chatbot.py

@@ -1,55 +1,93 @@
 import re
 import streamlit as st
+from datetime import datetime
 
+# ------------------------------
+# 💬 Chatbot Response Function
+# ------------------------------
 def chatbot_response(user_input):
-    user_input = user_input.lower()
+    """Generate a chatbot response using regex pattern matching."""
+    user_input = user_input.lower().strip()
 
     patterns = {
         r"\b(hi|hello|hey|hola)\b": "Hello there! 👋 How can I help you today?",
-        r"\b(how (are|r) you|how's it going)\b": "I'm doing great! How about you?",
-        r"\b(what is your name|who are you)\b": "I'm ChatBot — your non-friendly chatbot 🤖",
-        r"\b(help|support|assist|problem)\b": "Sure! Please tell me what issue you’re facing.",
-        r"\b(thank you|thanks|thx)\b": "You're welcome! 😊",
-        r"\b(weather|temperature)\b": "I can’t check the weather right now, but it’s always sunny in my code!",
-        r"\b(time)\b": "Check your system clock!",
-        r"\b(ok)\b": "Ok,anything else",
-        r"\b(bye|exit|quit|goodbye|see you)\b": "Bye! Have a great day! 👋",
-        r"\b(joke|funny)\b": "Why did the computer show up at work late? It had a hard drive! 😂",
-        r"\b(why)\b": "cause I am a bot",
-        r"b(no|nah|nope)\b": "Okay",
-        r"\b(yes|yeah|yep|sure)\b": "Great!"
+        r"\b(how (are|r) you|how's it going)\b": "I'm doing great! Thanks for asking 😊 How about you?",
+        r"\b(what is your name|who are you)\b": "I'm PyBot 🤖 — your friendly chatbot!",
+        r"\b(help|support|assist|problem)\b": "Sure! Please tell me what issue you’re facing. 🛠️",
+        r"\b(thank you|thanks|thx)\b": "You're most welcome! 🙏",
+        r"\b(weather|temperature)\b": "I can’t check the weather right now, but it’s always sunny in my code! ☀️",
+        r"\b(time)\b": f"The current time is {datetime.now().strftime('%I:%M %p')} 🕒",
+        r"\b(ok|okay|fine)\b": "Okay! 👍 Anything else?",
+        r"\b(bye|exit|quit|goodbye|see you)\b": "Bye! 👋 Have a fantastic day!",
+        r"\b(joke|funny)\b": "😂 Why did the computer show up at work late? It had a hard drive!",
+        r"\b(why)\b": "Because that's how my developer coded me 🤖",
+        r"\b(no|nah|nope)\b": "Alright, no worries 🙂",
+        r"\b(yes|yeah|yep|sure)\b": "Great! Let's continue 🚀"
     }
 
+    # Match input with regex patterns
     for pattern, response in patterns.items():
         if re.search(pattern, user_input):
             return response
 
-    return "Hmm, I didn’t quite understand that. Could you try rephrasing?"
+    # Default response
+    return "Hmm 🤔, I didn’t quite get that. Could you please rephrase?"
 
-st.set_page_config(page_title="Chatbot", page_icon="🤖", layout="centered")
+# ------------------------------
+# ⚙️ Streamlit Page Config
+# ------------------------------
+st.set_page_config(page_title="PyBot Chat", page_icon="🤖", layout="centered")
 
-st.title("Chatbot")
-# st.markdown("Chat with a simple **rule-based chatbot** built using **Python + Streamlit + Regex**.")
-
-# Initialize chat history in Streamlit session state
+# ------------------------------
+# 🧠 Chat History Initialization
+# ------------------------------
 if "chat_history" not in st.session_state:
     st.session_state.chat_history = []
 
-# Input box
-user_input = st.chat_input("Type your message...")
+# ------------------------------
+# 🧾 App Title
+# ------------------------------
+st.markdown("<h1 style='text-align:center;'>🤖 PyBot - Your Mini Chat Assistant</h1>", unsafe_allow_html=True)
+st.caption("A simple rule-based chatbot built using Python + Streamlit + Regex")
+
+st.divider()
+
+# ------------------------------
+# 💬 Chat Input Area
+# ------------------------------
+user_input = st.chat_input("Type your message here...")
 
+# If user sends a message
 if user_input:
     response = chatbot_response(user_input)
     st.session_state.chat_history.append(("You", user_input))
     st.session_state.chat_history.append(("PyBot", response))
 
-# Display chat history
+# ------------------------------
+# 🗨️ Display Chat History
+# ------------------------------
 for sender, message in st.session_state.chat_history:
     if sender == "You":
-        st.markdown(f"🧑 **You:** {message}")
+        st.markdown(
+            f"<div style='background-color:#DCF8C6;padding:10px;border-radius:10px;margin:5px 0;'><b>🧑 You:</b> {message}</div>",
+            unsafe_allow_html=True
+        )
     else:
-        st.markdown(f"🤖 **Bot:** {message}")
+        st.markdown(
+            f"<div style='background-color:#E6E6FA;padding:10px;border-radius:10px;margin:5px 0;'><b>🤖 PyBot:</b> {message}</div>",
+            unsafe_allow_html=True
+        )
+
+# ------------------------------
+# 🧹 Clear Chat Button
+# ------------------------------
+if st.button("🗑️ Clear Chat"):
+    st.session_state.chat_history = []
+    st.experimental_rerun()
+
+st.divider()
 
-# Footer note
-st.markdown("---")
-st.caption("A simple Chatbot ")
+# ------------------------------
+# 📜 Footer
+# ------------------------------
+st.markdown("<center>Built with ❤️ using <b>Streamlit</b></center>", unsafe_allow_html=True)