使用 DictReader 和 DictWriter 我需要找到 file1.csv 和 file2.csv 之間的匹配值。如果找到匹配項，請將其從 file1.csv 中刪除文件1.csvUserName,LastIP,LastLogonJessica_Alba,10.10.10.11,11/14/2019Karen_Edwards,10.10.10.12,11/14/2019Tracy_Chung,10.10.10.25,11/15/2019文件2.csvDepartment,UserName,LastPasswordReset,LastIPIT,Jessica_Alba,9/14/2019,10.10.10.11Accounting,Karen_Edwards,9/14/2019,10.10.10.12通過刪除匹配的用戶更新 file1.csv 的兩個文件比較后的預(yù)期輸出UserName,LastIP,LastLogonTracy_Chung,10.10.10.25,11/15/2019但是，我的代碼似乎并非如此。我究竟做錯了什么？data3 = []with open("file1.csv","r") as in_file1, open("file2.csv", "r") as in_file2:    reader1 = csv.DictReader(in_file1)    reader2 = csv.DictReader(in_file2)    for row2 in reader2:        for row1 in reader1:            print(row1['UserName'])            if row2['UserName'] != row1['UserName']:                data3.append(row1)print(data3)