Update app.py

app.py

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+import streamlit as st
+import numpy as np
+import matplotlib.pyplot as plt
+
+# App title
+st.set_page_config(page_title="Dynamic Pricing AI", layout="centered")
+st.title("💸 AI-Based Dynamic Pricing System")
+st.write("""
+This web app calculates *dynamic product prices* based on demand, supply, competition, and seasonal factors — just like real businesses do.
+""")
+
+# Sidebar Inputs
+st.sidebar.header("Input Parameters")
+base_price = st.sidebar.number_input("Base Product Price (₹)", min_value=50.0, value=100.0)
+demand = st.sidebar.slider("Demand Level", 0.0, 1.0, 0.5)
+supply = st.sidebar.slider("Supply Level", 0.0, 1.0, 0.5)
+competition_price = st.sidebar.number_input("Competitor Average Price (₹)", min_value=50.0, value=100.0)
+season_factor = st.sidebar.slider("Season Factor (Festive = 1.2, Off-season = 0.8)", 0.5, 1.5, 1.0)
+
+# Dynamic Pricing Formula
+dynamic_price = base_price * (1 + (demand - supply) * 0.4) * season_factor
+dynamic_price = (dynamic_price + competition_price) / 2
+
+# Show recommended price
+st.subheader(f"💡 Recommended Dynamic Price: ₹{round(dynamic_price, 2)}")
+
+# Visualization: Price vs Demand Curve
+demand_values = np.linspace(0, 1, 10)
+prices = base_price * (1 + (demand_values - supply) * 0.4) * season_factor
+prices = (prices + competition_price) / 2
+
+plt.figure(figsize=(6,4))
+plt.plot(demand_values, prices, marker='o', color='blue', label='Price vs Demand')
+plt.xlabel('Demand Level')
+plt.ylabel('Price (₹)')
+plt.title('Dynamic Pricing Curve')
+plt.legend()
+plt.grid(True)
+st.pyplot(plt)
+
+# Explanation
+st.write("""
+### 📈 How it Works
+- *Higher demand* → price increases  
+- *Higher supply* → price decreases  
+- *Season factor* adjusts prices for festive/off-season  
+- *Competitor price* ensures market competitiveness  
+
+### 🎓 Business Concepts
+- Demand-Supply Economics  
+- Price Elasticity  
+- Strategic Pricing  
+- AI & Data-Driven Decision Making
+""")
+
+st.info("💬 Try adjusting sliders to see how the recommended price changes in real-time!")