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POCalling scrapy from a python script not creating JSON output file
 

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  1. POCalling scrapy from a python script not creating JSON output file
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    <p>Here's the python script that i am using to call scrapy, the answer of </p> <p><a href="https://stackoverflow.com/questions/14777910/scrapy-crawl-from-script-always-blocks-script-execution-after-scraping">Scrapy crawl from script always blocks script execution after scraping</a></p> <pre><code>def stop_reactor(): reactor.stop() dispatcher.connect(stop_reactor, signal=signals.spider_closed) spider = MySpider(start_url='abc') crawler = Crawler(Settings()) crawler.configure() crawler.crawl(spider) crawler.start() log.start() log.msg('Running reactor...') reactor.run() # the script will block here until the spider is closed log.msg('Reactor stopped.') </code></pre> <p>here's my pipelines.py code</p> <pre><code>from scrapy import log,signals from scrapy.contrib.exporter import JsonItemExporter from scrapy.xlib.pydispatch import dispatcher class scrapermar11Pipeline(object): def __init__(self): self.files = {} dispatcher.connect(self.spider_opened , signals.spider_opened) dispatcher.connect(self.spider_closed , signals.spider_closed) def spider_opened(self,spider): file = open('links_pipelines.json' ,'wb') self.files[spider] = file self.exporter = JsonItemExporter(file) self.exporter.start_exporting() def spider_closed(self,spider): self.exporter.finish_exporting() file = self.files.pop(spider) file.close() def process_item(self, item, spider): self.exporter.export_item(item) log.msg('It reached here') return item </code></pre> <p>This code is taken from here</p> <p><a href="https://stackoverflow.com/questions/7839559/scrapy-issues-with-json-export">Scrapy :: Issues with JSON export</a></p> <p>When i run the crawler like this</p> <pre><code>scrapy crawl MySpider -a start_url='abc' </code></pre> <p>a links file with the expected output is created .But when i execute the python script it does not create any file though the crawler runs as the dumped scrapy stats are similar to those of the previous run. I think there's a mistake in the python script as the file is getting created in the first approach .How do i get the script to output the file ? </p>
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    1. CONot sure if it'll help, but: have you tried to run it via crawlerprocess (http://stackoverflow.com/questions/9530046/can-i-execute-scrapypython-crawl-outside-the-project-dir and http://stackoverflow.com/questions/6494067/running-scrapy-from-a-script-hangs)?
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    2. CO@AlexanderAfanasiev both the solutions use scrapy.conf which is deprecated in 0.16. However will still try to use crawlerprocess.
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