Question

我正在尝试将前3行Vehicle Owners.csv写入Speeding Owners.csv以及Speeding Vehicles.csv的第3和第4行。但是，如果没有超速车辆与车主相匹配，则车主将失去车主.cv

有人可以解释为什么这不起作用吗？

Speeding Vehicles.csv看起来像这样：

GH76GHJ，华莱士街，30,35.0
  GH67MNB，华莱士街，30,35.0
  GH76GHJ，绿色街道，40,55.9
  GH76GJ，绿色街道，40,55.9

Vehicle Owners.csv如下所示：

GH76HJK，1红街，罗斯赌博   BH98LOP，1国王路，muammar gaddafi
  CX87YHJ，1艾莉森驱动器，chandler bing
  HJ09UJI，6 avenue，idi amin
  KI59TOM，7华尔街，罗伯特·马卡布

我目前的代码是：

import csv

with open('Vehicle Owners.csv', 'r') as vehicleownersfile:
    owner_reader = csv.reader(vehicleownersfile)
    details = {row[0].lower(): row for row in owner_reader}

with open('Speeding Vehicles.csv', 'r') as speedingvehiclesfile:
    owner_reader = csv.reader(speedingvehiclesfile)

    with open('Speeding Owners.csv', 'w') as speedingownersfile:
        sowriter = csv.writer(speedingownersfile)

        with open('Missing Owners.csv', 'w') as missingownersfile:
            mowriter = csv.writer(missingownersfile)

            for row in owner_reader:
                detail = details.get(row[1].lower())

                if detail is None:
                     mowriter.writerow(row[0], row[1], row[2])
                else:
                     sowriter.writerow(row[0], row[1], row[2], detail[1], detail[2])

Answer 1

我并不完全知道你要做什么，但对我来说，Python（3）大声说writerow需要1个参数，所以我不得不替换这些行：

mowriter.writerow(row[0], row[1], row[2])
sowriter.writerow(row[0], row[1], row[2], detail[1], detail[2])

通过

mowriter.writerow(row[0:3])
sowriter.writerow(row[0:2] + detail[1:3])

在Python中读取和写入CSV文件

1 个答案: