标签:sel level for access stdout 大型软件 使用 img evel
logging模块是Python提供的自己的程序日志记录模块。
在大型软件使用过程中,出现的错误有时候很难进行重现,因此需要通过分析日志来确认错误位置,这也是写程序时要使用日志的最重要的原因。
scrapy使用python内置的logging模块记录日志
1. logging.CRITICAL - for critical errors (highest severity)
2. logging.ERROR - for regular errors
3. logging.WARNING - for warning messages
4. logging.INFO - for informational messages
5. logging.DEBUG - for debugging messages (lowest severity)
1.简单使用方法
import logging
Logging.warning(“this is a test ”)
执行结果:
2.通用的记录日志的方法,可加入日志的级别
import logging
Logging.log(logging.WARNING,”this is a warning”)
3,通过logger记录日志
import logging
logger=logging.getLogger(_name_)
Logger.warning(“this is a warning”)
Scrapy provides a logger within each Spider instance, that can be accessed and used like this:
import scrapy
class MySpider(scrapy.Spider):
name = ‘myspider‘
start_urls = [‘http://scrapinghub.com‘]
def parse(self, response):
self.logger.info(‘Parse function called on %s‘, response.url)
That logger is created using the Spider’s name, but you can use any custom Python logger you want. For example:
import logging import scrapy
logger = logging.getLogger(‘mycustomlogger‘)
class MySpider(scrapy.Spider):
name = ‘myspider‘
start_urls = [‘http://scrapinghub.com‘]
def parse(self, response):
logger.info(‘Parse function called on %s‘, response.url)
These settings can be used to configure the logging:
? LOG_FILE
? LOG_ENABLED
? LOG_ENCODING
? LOG_LEVEL
? LOG_FORMAT
? LOG_DATEFORMAT
? LOG_STDOUT
转载自:http://www.maiziedu.com/wiki/crawler/logging/
标签:sel level for access stdout 大型软件 使用 img evel
原文地址:http://www.cnblogs.com/themost/p/7044879.html