openapi / app.py
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import gradio as gr
import pickle
import numpy as np
import pandas as pd
# Load the saved model and LabelEncoder
with open('xgb_model.pkl', 'rb') as f:
model = pickle.load(f)
with open('le_fartoy.pkl', 'rb') as f:
le_fartoy = pickle.load(f)
# Define the prediction function
def predict_accidents(fartoy_gruppe, year):
try:
# Encode the selected vessel group
fartoy_encoded = le_fartoy.transform([fartoy_gruppe])[0]
# Features must be in the exact order: ['FartøyGruppe', 'Ulykke_Year']
features = np.array([[fartoy_encoded, year]])
# Get model prediction
prediction = model.predict(features)[0]
# Round and ensure non-negative
predicted_count = max(0, int(round(prediction)))
return f"Predicted Number of Accidents: {predicted_count}"
except Exception as e:
return f"Error during prediction: {str(e)}"
# Get the list of vessel groups for the dropdown
vessel_groups = sorted(list(le_fartoy.classes_))
# Build Gradio UI with custom inputs (Dropdown and Slider)
interface = gr.Interface(
fn=predict_accidents,
inputs=[
gr.Dropdown(choices=vessel_groups, label="FartøyGruppe (Vessel Group)", value=vessel_groups[0]),
gr.Slider(minimum=1981, maximum=2032, step=1, label="Ulykke_Year (Accident Year)", value=2024)
],
outputs=gr.Textbox(label="Prediction Output"),
title="Maritime Accident Predictor (XGBoost)",
description="Select a vessel category and year to predict the annual aggregated number of accidents using the optimized XGBoost Regressor model.",
theme="soft"
)
if __name__ == '__main__':
interface.launch()