有如下兩個文件one.csv 列0, 列1, 列2, 列3 1, a, ww.ok;ww.ant;, anything 2, e, ww.kdi;, ihy 3, se, ww.sdd, sld 4, sd, ww.akd, sdjfa two.csv 列0, 列1, 列2, 列3 1, sd, ww.ok;, 1245 2, 2e3, ww.kdi;, 432 3, de, ww.sdd;, 232 目標是先判斷one.csv列2是否包含two.csv文件列2，如果包含，則將two.csv列3的數(shù)據(jù)追加到one.csv對應行的末尾，最終結果效果如下: result.csv 列0, 列1, 列2, 列3, 列4 1, a, ww.ok;ww.ant;, anything 1245 2, e, ww.kdi;, ihy 432 3, se, ww.sdd, sld 232 4, sd, ww.akd, sdjfa 自己寫了幾行代碼，一直卡在追加這一塊，因為實際要處理的數(shù)據(jù)量大，不像給出的樣本這樣，以one.csv為基礎遍歷，則比對的數(shù)據(jù)不全，以two.csv為基礎遍歷，則寫文件不知道如何進行。求前輩們指點。 import csv import datetime start = datetime.datetime.now() with open('D:\one.csv') as one: ic_rd = csv.reader(one) next(ic_rd) for i in ic_rd: with open('D:\two.csv') as ga: ga_rd = csv.reader(ga) next(ga_rd) for g in ga_rd: if g[2] in i[2]: i.append(g[2]) break with open('D:\\result.csv','a+') as rs: writer = csv.writer(rs) writer.writerow(i) end = datetime.datetime.now() print (end-start)