将数据写入csv文件

import csv
import os

def writercsv():
    stu1=['1','2','3']
    stu2=['4','5','6']
    if os.path.isfile('test_launch.csv'):
        with open('test_launch.csv','a',newline='')as f:
            csv_write=csv.writer(f,dialect='excel')
            csv_write.writerow(stu1)
            csv_write.writerow(stu2)
    else:
         with open('test_launch.csv','w',newline='')as f:
            csv_write=csv.writer(f,dialect='excel')
            csv_write.writerow(['设备名称','android版本号','分辨率','app版本号','第一次','第二次','第三次','平均值','测试时间'])
            csv_write.writerow(stu1)
            csv_write.writerow(stu2)

if __name__=='__main__':
    writercsv()