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(['裝置名稱','android版本號','解析度','app版本號','第一次','第二次','第三次','平均值','測試時間'])
            csv_write.writerow(stu1)
            csv_write.writerow(stu2)

if __name__=='__main__':
    writercsv()