在Scrapy中處理異常通常涉及到使用try-except
塊捕獲異常并進行相應的處理。以下是一些常見的異常處理方法:
try-except
塊捕獲異常并進行處理,例如:class MySpider(scrapy.Spider):
name = 'myspider'
def start_requests(self):
try:
# your code here
except Exception as e:
self.logger.error('An error occurred: %s' % e)
scrapy.signals
模塊中的信號來捕獲異常并進行處理,例如:from scrapy import signals
from scrapy.exceptions import NotConfigured
class MySpider(scrapy.Spider):
name = 'myspider'
@classmethod
def from_crawler(cls, crawler, *args, **kwargs):
spider = super(MySpider, cls).from_crawler(crawler, *args, **kwargs)
crawler.signals.connect(spider.spider_error, signal=signals.spider_error)
return spider
def spider_error(self, failure, response, spider):
self.logger.error('An error occurred: %s' % failure.getErrorMessage())
scrapy.exceptions
模塊中的異常類來捕獲特定類型的異常,例如:from scrapy.exceptions import IgnoreRequest
class MySpider(scrapy.Spider):
name = 'myspider'
def parse(self, response):
try:
# your code here
except IgnoreRequest:
self.logger.info('Request ignored')
這些是一些常見的處理Scrapy中異常的方法,根據具體情況選擇合適的方法來處理異常。