dekker.one
A web scraper build to search specific information for a given compound (and its pseudonyms)
Added a pipeline to replace None values with empty strings
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-2
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FourmiCrawler/pipelines.py
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FourmiCrawler/pipelines.py
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import re
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from scrapy.exceptions import DropItem
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class RemoveNonePipeline(object):
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def __init__(self):
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self.known_values = set()
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def process_item(self, item, spider):
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"""
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Processing the items so None values are replaced by empty strings
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:param item: The incoming item
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:param spider: The spider which scraped the spider
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:return: :raise DropItem: Returns the item if unique or drops them if it's already known
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"""
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for key in item:
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if item[key] is None:
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item[key] = ""
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return item
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class DuplicatePipeline(object):
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FourmiCrawler/settings.py
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FourmiCrawler/settings.py
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SPIDER_MODULES = ['FourmiCrawler']
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NEWSPIDER_MODULE = 'FourmiCrawler'
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ITEM_PIPELINES = {
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'FourmiCrawler.pipelines.AttributeSelectionPipeline': 100,
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'FourmiCrawler.pipelines.DuplicatePipeline': 200,
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"FourmiCrawler.pipelines.RemoveNonePipeline": 100,
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'FourmiCrawler.pipelines.AttributeSelectionPipeline': 200,
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'FourmiCrawler.pipelines.DuplicatePipeline': 300,
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}
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FEED_URI = 'results.json'
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FEED_FORMAT = 'jsonlines'