python - 垃圾日志问题

Question

我在一个项目中有多个爬虫，问题是现在我正在 SETTINGS 中定义 LOG_FILE

LOG_FILE = "scrapy_%s.log" % datetime.now()

我想要的是scrapy_SPIDERNAME_DATETIME

但我无法在 log_file 名称中提供 spidername ..

我找到了

scrapy.log.start(logfile=None, loglevel=None, logstdout=None)

并在每个蜘蛛 init 方法中调用它，但它不起作用..

任何帮助将不胜感激

Answer 1

蜘蛛的 __init__() 还不够早，无法自行调用 log.start()，因为此时日志观察器已经启动；因此，您需要重新初始化日志记录状态以欺骗 Scrapy 进入(重新)启动它。

在你的蜘蛛类文件中:

from datetime import datetime
from scrapy import log
from scrapy.spider import BaseSpider

class ExampleSpider(BaseSpider):
    name = "example"
    allowed_domains = ["example.com"]
    start_urls = ["http://www.example.com/"]

    def __init__(self, name=None, **kwargs):
        LOG_FILE = "scrapy_%s_%s.log" % (self.name, datetime.now())
        # remove the current log
        # log.log.removeObserver(log.log.theLogPublisher.observers[0])
        # re-create the default Twisted observer which Scrapy checks
        log.log.defaultObserver = log.log.DefaultObserver()
        # start the default observer so it can be stopped
        log.log.defaultObserver.start()
        # trick Scrapy into thinking logging has not started
        log.started = False
        # start the new log file observer
        log.start(LOG_FILE)
        # continue with the normal spider init
        super(ExampleSpider, self).__init__(name, **kwargs)

    def parse(self, response):
        ...

输出文件可能如下所示:

scrapy_example_2012-08-25 12:34:48.823896.log