Build a script to track fuel efficiency

Here’s a simple Python script that allows a user to track fuel efficiency (e.g., miles per gallon or kilometers per liter) over multiple entries. The script stores data locally in a CSV file so it persists across sessions.

python
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import csv
import os

DATA_FILE = 'fuel_efficiency_log.csv'

def initialize_file():
    if not os.path.exists(DATA_FILE):
        with open(DATA_FILE, mode='w', newline='') as file:
            writer = csv.writer(file)
            writer.writerow(['Date', 'Distance (km)', 'Fuel Used (liters)', 'Efficiency (km/l)'])

def log_trip(date, distance_km, fuel_liters):
    efficiency = round(distance_km / fuel_liters, 2)
    with open(DATA_FILE, mode='a', newline='') as file:
        writer = csv.writer(file)
        writer.writerow([date, distance_km, fuel_liters, efficiency])
    print(f"Trip logged: {efficiency} km/l")

def show_logs():
    if not os.path.exists(DATA_FILE):
        print("No data found.")
        return

    with open(DATA_FILE, mode='r') as file:
        reader = csv.reader(file)
        for row in reader:
            print('t'.join(row))

def main():
    initialize_file()
    while True:
        print("nFuel Efficiency Tracker")
        print("1. Log new trip")
        print("2. Show log")
        print("3. Exit")
        choice = input("Choose an option: ")

        if choice == '1':
            date = input("Enter date (YYYY-MM-DD): ")
            distance = float(input("Enter distance traveled (km): "))
            fuel = float(input("Enter fuel used (liters): "))
            log_trip(date, distance, fuel)
        elif choice == '2':
            show_logs()
        elif choice == '3':
            print("Goodbye!")
            break
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()

Features:

• Records date, distance, fuel used, and calculated efficiency.

• Stores data in a CSV file for future reference.

• CLI-based interaction, suitable for terminal/console use.

Notes:

• You can switch to miles/gallons by modifying the unit names and efficiency formula (miles / gallons).

• For web or mobile version, let me know if you want to upgrade this into a Flask app or React interface.