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import streamlit as st
import numpy as np
from sklearn.linear_model import LinearRegression
# Streamlit page config
st.set_page_config(page_title="BigMart Sales Predictor", page_icon="🛒", layout="centered")
st.title("🛒 BigMart Sales Prediction")
st.markdown("Enter item details below to predict sales:")
# Input fields
project_name = st.text_input("📦 Project Name")
item_weight = st.number_input("⚖️ Item Weight (in kg)", min_value=0.0, step=0.1)
item_visibility = st.slider("👀 Item Visibility", 0.0, 1.0, 0.05)
item_mrp = st.number_input("💰 Item MRP", min_value=0.0, step=1.0)
# Predict button
if st.button("Predict Sales"):
if not project_name:
st.warning("Please enter a project name.")
else:
# Dummy training data for demo
X_train = np.array([
[9.3, 0.016, 249.8],
[5.92, 0.019, 48.27],
[17.5, 0.016, 141.62],
[19.2, 0.0075, 182.095],
])
y_train = np.array([3735.14, 443.42, 2233.6, 3612.47]) # Target: Item_Outlet_Sales
# Train model
model = LinearRegression()
model.fit(X_train, y_train)
# Prepare user input
user_input = np.array([[item_weight, item_visibility, item_mrp]])
predicted_sales = model.predict(user_input)[0]
st.success(f"📈 Predicted Sales for '{project_name}': ₹{predicted_sales:,.2f}")
# Sidebar
st.sidebar.title("📌 About")
st.sidebar.markdown(
"""
This app predicts sales based on item weight, visibility, and MRP using a demo ML model.
🔧 Replace with a trained model on BigMart dataset for real-world use!
"""
)
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