写一个python脚本，可以支持传入两个参数，参数1:指定log文件，参数2:指定uart设备端，参数3:指定uart波特率, 参数4: 指定timeout时间。脚本中写一个函数，将uart的输出打印到log文件， 并打印出log文件的路径。并写一个help，提示脚本如何使用.

import logging
import serial
import argparse

def print_uart_to_log(file_name, uart_device, baud_rate, timeout):
    log_format = '%(asctime)s - %(levelname)s - %(message)s'
    logging.basicConfig(filename=file_name, level=logging.INFO, format=log_format)

    try:
        ser = serial.Serial(uart_device, baud_rate, timeout=timeout)
        while True:
            line = ser.readline().decode()
            if line:
                logging.info(line.strip())
                print(f"Uart output logged: {line.strip()}")
    except Exception as e:
        logging.error("Error reading from UART: ", exc_info=True)
        print(f"Error: {str(e)}")

def main():
    parser = argparse.ArgumentParser(description="Script to print UART data to a log file.")
    parser.add_argument("-f", "--file", dest="logfile", required=True, help="Path to the log file")
    parser.add_argument("-u", "--uart", dest="uart_device", required=True, help="Serial port device (e.g., /dev/ttyUSB0)")
    parser.add_argument("-b", "--baud", type=int, dest="baud_rate", required=True, help="UART baud rate")
    parser.add_argument("-t", "--timeout", type=float, dest="timeout", default=1, help="Timeout in seconds for serial read")

    args = parser.parse_args()

    print_uart_to_log(args.logfile, args.uart_device, args.baud_rate, args.timeout)

if __name__ == "__main__":
    main()
    
#