python csv模块，仅写入特定列

Question

我正在尝试从csv中读取特定的列并写入另一个csv。

这是我的代码：

import csv

with open('contribs_01.csv', 'r') as file:
    csv_reader = csv.DictReader(file)

    with open('01_output.csv', 'w') as new_file:
        select_fields = ['contributorNameLast', 'contributorNameFirst', 'contributorStreetCity', 'contributorStreetStateCd', 'contributorStreetPostalCode', 'contributorOccupation', 'filerName']

        csv_writer = csv.DictWriter(new_file, fieldnames=select_fields)

        csv_writer.writeheader()

        for line in csv_reader:
            csv_writer.writerow(line)

运行它时，出现此错误：

Traceback (most recent call last):
  File "01_donor_read.py", line 16, in <module>
    csv_writer.writerow(line)
  File "C:\Python27\lib\csv.py", line 152, in writerow
    return self.writer.writerow(self._dict_to_list(rowdict))
  File "C:\Python27\lib\csv.py", line 148, in _dict_to_list
    + ", ".join([repr(x) for x in wrong_fields]))
ValueError: dict contains fields not in fieldnames: 'contributorParent1LawFirmName', 'receivedDt', 'recordType', 'contributionAmount', 'contributorNamePrefixCd', 'contributorPacFein', 'contributorStreetCountyCd', 'contributorParent2LawFirmName', 'schedFormTypeCd', 'contributionDescr', 'contributorEmployer', 'contributorStreetRegion', 'contributionDt', 'contributorStreetCountryCd', 'contributorSpouseLawFirmName', 'contributorNameShort', 'formTypeCd', 'infoOnlyFlag', 'filerTypeCd', 'contributorOosPacFlag', 'contributorJobTitle', 'itemizeFlag', 'contributorNameOrganization', 'contributorNameSuffixCd', 'travelFlag', 'filerIdent', 'reportInfoIdent', 'contributionInfoId'

有人有什么想法吗？