How to override join_multivalued option of CsvItemExporter

问题

CsvItemExporter has an option join_multivalued that defaults to a comma (=',').

How can i change this to another char in my scrapy project?

回答1:

Set it in your custom CSVItemExporter this way:

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', ',')

where MY_CSV_DELIMITER is an example setting you would have for a delimiter.

回答2:

Scrapy version 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 = ';'

来源：https://stackoverflow.com/questions/28089977/how-to-override-join-multivalued-option-of-csvitemexporter