在scrapy中修改CSV导出 [英] Modifiying CSV export in scrapy

问题描述

我似乎遗漏了一些非常简单的东西.我想要做的就是使用 ; 作为CSV 导出器中的分隔符，而不是 ,.

I seem to be missing something very simple. All i want to do is use ; as a delimiter in the CSV exporter instead of ,.

我知道 CSV 导出器将 kwargs 传递给 csv writer，但我似乎无法弄清楚如何传递这个分隔符.

I know the CSV exporter passes kwargs to csv writer, but i cant seem to figure out how to pass this the delimiter.

我这样称呼我的蜘蛛:

scrapy crawl spidername --set FEED_URI=output.csv --set FEED_FORMAT=csv 

推荐答案

在 contrib/feedexport.py,

class FeedExporter(object):

    ...

    def open_spider(self, spider):
        file = TemporaryFile(prefix='feed-')
        exp = self._get_exporter(file)  # <-- this is where the exporter is instantiated
        exp.start_exporting()
        self.slots[spider] = SpiderSlot(file, exp)

    def _get_exporter(self, *a, **kw):
        return self.exporters[self.format](*a, **kw)  # <-- not passed in :(

您需要自己制作，这是一个示例:

You will need to make your own, here's an example:

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


class CsvOptionRespectingItemExporter(CsvItemExporter):

    def __init__(self, *args, **kwargs):
        delimiter = settings.get('CSV_DELIMITER', ',')
        kwargs['delimiter'] = delimiter
        super(CsvOptionRespectingItemExporter, self).__init__(*args, **kwargs)

在你的爬虫目录的settings.py文件中，添加:

In the settings.py file of your crawler directory, add this:

FEED_EXPORTERS = {
    'csv': 'importable.path.to.CsvOptionRespectingItemExporter',
}

现在，您可以按如下方式执行您的蜘蛛:

Now, you can execute your spider as follows:

scrapy crawl spidername --set FEED_URI=output.csv --set FEED_FORMAT=csv --set CSV_DELIMITER=';'

HTH.

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