在Scrapy中处理异常通常涉及到使用try-except
块捕获异常并进行相应的处理。以下是一些常见的异常处理方法:
try-except
块捕获异常并进行处理,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
模块中的信号来捕获异常并进行处理,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
模块中的异常类来捕获特定类型的异常,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')
这些是一些常见的处理Scrapy中异常的方法,根据具体情况选择合适的方法来处理异常。