问如何为使用PySerial收集的数据添加时间戳并导出到csv？

EN

import time
import csv
from threading import Thread
import fio2

def Csv_creator():
    my_file = open('test_csv.csv', 'w+')

    with my_file:
        new_file = csv.writer(my_file)

def Timestamp():
    date_now = time.strftime('%d/%m/%y')
    time_now = time.strftime('%H:%M:%S')
    return [date_now,time_now]


def Write_loop():
    Csv_creator()
    fio2.Initialize()

    while True:
        with open('test_csv.csv', 'a') as f:
            [date_now,time_now] = Timestamp()
            fio2_data = fio2.Reader()
            print fio2_data
            to_write = [date_now,time_now,fio2_data]
            csv_file = csv.writer(f)
            csv_file.writerow(to_write)     

t = Thread(target=Write_loop)
t.daemon = True
t.start()

raw_input("Press any key to stop \n")

import serial

ser = serial.Serial("COM6",
                    baudrate=2400,
                    bytesize=serial.EIGHTBITS,
                    parity =serial.PARITY_ODD,
                    timeout=1,
                    writeTimeout =1)


def Initialize():
    global ser
    try:
        ser.isOpen()
        print("\n Serial is open")
    except: 
        print ("Error: serial Not Open")

def Reader():
    global ser
    if (ser.isOpen()):

        try:                    
            x = ser.readline().decode()
            x = (x)
            return x
        except:
            return "unable to print"
    else: 
        return "cannot open serial port"