model_predictor.py

from joblib import load
from datetime import datetime, timedelta

model = load("amc_model.pkl")

def predict_next_service(last_service_date):
    today = datetime.today()
    delta_days = (today - datetime.strptime(last_service_date, "%Y-%m-%d")).days
    predicted_days = int(model.predict([[delta_days]])[0])
    return (today + timedelta(days=predicted_days)).strftime("%Y-%m-%d")