如何覆盖 CsvItemExporter 的 join_multivalued 选项

How to override join_multivalued option of CsvItemExporter

CsvItemExporter 有一个选项 join_multivalued,默认为逗号 (=',')。

如何在我的 scrapy 项目中将其更改为另一个字符?

在您的自定义 CSVItemExporter 中这样设置:

from scrapy.conf import settings
from scrapy.contrib.exporter import CsvItemExporter

class CSVkwItemExporter(CsvItemExporter):

    def __init__(self, *args, **kwargs):
        kwargs['fields_to_export'] = settings.getlist('EXPORT_FIELDS') or None
        kwargs['encoding'] = settings.get('EXPORT_ENCODING', 'utf-8')

        super(CSVkwItemExporter, self).__init__(*args, **kwargs)

        self._join_multivalued = settings.get('MY_CSV_DELIMITER', ',')

其中 MY_CSV_DELIMITER 是分隔符的示例设置。

Scrapy 版本 1.5.0

your_scrapy_project/exporters.py

from scrapy.conf import settings
from scrapy.exporters import CsvItemExporter

class MyCsvItemExporter(CsvItemExporter):

    def __init__(self, *args, **kwargs):

        delimiter = settings.get('CSV_DELIMITER', ';')
        kwargs['delimiter'] = delimiter

        super(MyCsvItemExporter, self).__init__(*args, **kwargs) 

your_scrapy_project/settings.py

FEED_EXPORT_ENCODING = 'utf-8'

FEED_EXPORTERS = {
    'csv': 'your_scrapy_project.exporters.MyCsvItemExporter',
}

CSV_DELIMITER = ';'