讀取

import csv

with open('test.csv','r',encoding='utf8') as csvfile:
    reader = csv.reader(csvfile)
    for i in reader:
        print(i)

寫入

key_words = [111，222，333]

out = open('test.csv','a',newline='',encoding='utf8')
csv_write = csv.writer(out,dialect='excel')

csv_write.writerow(key_words )
    
 

獲取指定資料夾下的所以檔案

import os
p = os.listdir(r'E:\test1\test')