php网站广告管理系统,wordpress换背景插件,网站站长在哪登陆后台,网站怎么更换服务器我正在创建一个应用程序来本质上充当一个资产数据库#xff0c;我试图打开一个CSV文件#xff0c;读取值并相应地更新它们。我看到很多关于如何读写CSV文件的教程#xff0c;但是我找不到一个详细介绍如何迭代CSV文件和更新单个值的教程。理想情况下#xff0c;与列表相比我试图打开一个CSV文件读取值并相应地更新它们。我看到很多关于如何读写CSV文件的教程但是我找不到一个详细介绍如何迭代CSV文件和更新单个值的教程。理想情况下与列表相比使用字典似乎更容易因此我可以按关键字(部件名称)进行搜索。它在大多数情况下都能工作但是我在将更新后的列表写入CSV文件时遇到了问题。我得到了以下错误“第155行书面形式返回自撰稿人(self.\u dict_to_列表(rowdict))值错误对关闭的文件执行I/O操作def write(part_name, part_numnull):with open(Database.csv, r) as file_read:fieldnames[Part_Name, Part_Num]csv_reader csv.DictReader(file_read, fieldnamesfieldnames)temp_list [] # Create temp copy of the csv filefor line in csv_reader: # Reading the CSV file and storing it in temp_listtemp_list.append(line)for line in temp_list: # Printing the original list to verify contents were read correctlyprint (line)for line in temp_list: # Reading each element in the list and updating the value if different from the value passed into the functionif (line[Part_Name] part_name and line[Part_Num] ! part_num):line[Part_Num] part_numfor line in temp_list: # Printing out the new vesion of the temp_list to verify updates tookprint (line)with open(Database.csv, w) as file_write:csv_writer csv.DictWriter(file_write, fieldnamesfieldnames)for line in temp_list: # Attempting to write the updated temp_list to the csv filecsv_writer.writerow(line)
