python 3.x - Scrapy Logging Level Change -

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i'm trying start scrapy spider scripty shown in here

logging.basicconfig(     filename='log.txt',     format='%(levelname)s: %(message)s',     level=logging.critical ) configure_logging(install_root_handler=false) process = crawlerprocess(get_project_settings())  process.crawl('1740') process.start() # script block here until crawling finished

i want configure logging level of spider if not install root logger handler , configure basic config logging.basicconfig method not obey determinded level. 

info: enabled spider middlewares: ['scrapy.spidermiddlewares.httperror.httperrormiddleware',  'scrapy.spidermiddlewares.offsite.offsitemiddleware',  'scrapy.spidermiddlewares.referer.referermiddleware',  'scrapy.spidermiddlewares.urllength.urllengthmiddleware',  'scrapy.spidermiddlewares.depth.depthmiddleware'] info: enabled item pipelines: ['collector.pipelines.collectorpipeline'] info: spider opened info: crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)

it following format , file name determined in basicconfig not use logging level. not determine logging level other place.

note: there not other place import logging or change logging level.

for scrapy should define logging settings in settings.py as described in docs

so in settings.py can set:

log_level = 'error'  # display errors log_format = '%(levelname)s: %(message)s' log_file = 'log.txt'

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