如何写一个文件，使用日志Python模块?

如何使用Python中的日志记录模块写入文件?每次我尝试使用它，它就会打印出信息。

当前回答

这里有一个更简单的方法。这个解决方案不使用a Config字典，并使用一个旋转文件处理程序，如下所示:

import logging
from logging.handlers import RotatingFileHandler
     
logging.basicConfig(handlers=[RotatingFileHandler(filename=logpath+filename,
                     mode='w', maxBytes=512000, backupCount=4)], level=debug_level,
                     format='%(levelname)s %(asctime)s %(message)s', 
                    datefmt='%m/%d/%Y%I:%M:%S %p')
     
logger = logging.getLogger('my_logger')

或像这样:

import logging
from logging.handlers import RotatingFileHandler
     
handlers = [ RotatingFileHandler(filename=logpath+filename, 
            mode='w', 
            maxBytes=512000, 
            backupCount=4)
           ]
logging.basicConfig(handlers=handlers, 
                    level=debug_level, 
                    format='%(levelname)s %(asctime)s %(message)s', 
                    datefmt='%m/%d/%Y%I:%M:%S %p')
     
logger = logging.getLogger('my_logger')

handlers变量需要是一个可迭代对象。Logpath +filename和debug_level只是变量各自的信息。当然，函数参数的值是向上的给你。

第一次我使用日志模块，我犯了写下面的错误，这产生了一个操作系统文件锁错误(的以上是解决方案):

import logging
from logging.handlers import RotatingFileHandler
     
logging.basicConfig(filename=logpath+filename, 
       level=debug_level, 
       format='%(levelname)s %(asctime)s %(message)s', 
       datefmt='%m/%d/%Y%I:%M:%S %p')
     
logger = logging.getLogger('my_logger')
logger.addHandler(RotatingFileHandler(
       filename=logpath+filename, 
       mode='w', 
       maxBytes=512000, 
       backupCount=4))

2020-02-17 13:13:13

其他回答

这个例子应该可以正常工作。我已经为控制台添加了流处理器。控制台日志和文件处理程序数据应该相似。

    # MUTHUKUMAR_TIME_DATE.py #>>>>>>>> file name(module)

    import sys
    import logging
    import logging.config
    # ================== Logger ================================
    def Logger(file_name):
        formatter = logging.Formatter(fmt='%(asctime)s %(module)s,line: %(lineno)d %(levelname)8s | %(message)s',
                                      datefmt='%Y/%m/%d %H:%M:%S') # %I:%M:%S %p AM|PM format
        logging.basicConfig(filename = '%s.log' %(file_name),format= '%(asctime)s %(module)s,line: %(lineno)d %(levelname)8s | %(message)s',
                                      datefmt='%Y/%m/%d %H:%M:%S', filemode = 'w', level = logging.INFO)
        log_obj = logging.getLogger()
        log_obj.setLevel(logging.DEBUG)
        # log_obj = logging.getLogger().addHandler(logging.StreamHandler())

        # console printer
        screen_handler = logging.StreamHandler(stream=sys.stdout) #stream=sys.stdout is similar to normal print
        screen_handler.setFormatter(formatter)
        logging.getLogger().addHandler(screen_handler)

        log_obj.info("Logger object created successfully..")
        return log_obj
    # =======================================================


MUTHUKUMAR_LOGGING_CHECK.py #>>>>>>>>>>> file name
# calling **Logger** function
file_name = 'muthu'
log_obj =Logger(file_name)
log_obj.info("yes   hfghghg ghgfh".format())
log_obj.critical("CRIC".format())
log_obj.error("ERR".format())
log_obj.warning("WARN".format())
log_obj.debug("debug".format())
log_obj.info("qwerty".format())
log_obj.info("asdfghjkl".format())
log_obj.info("zxcvbnm".format())
# closing file
log_obj.handlers.clear()

OUTPUT:
2019/07/13 23:54:40 MUTHUKUMAR_TIME_DATE,line: 17     INFO | Logger object created successfully..
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 8     INFO | yes   hfghghg ghgfh
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 9 CRITICAL | CRIC
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 10    ERROR | ERR
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 11  WARNING | WARN
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 12    DEBUG | debug
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 13     INFO | qwerty
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 14     INFO | asdfghjkl
2019/07/13 23:54:40 MUTHUKUMAR_LOGGING_CHECK,line: 15     INFO | zxcvbnm

Thanks,

2019-07-13 18:36:31

摘自“伐木食谱”:

# create logger with 'spam_application'
logger = logging.getLogger('spam_application')
logger.setLevel(logging.DEBUG)
# create file handler which logs even debug messages
fh = logging.FileHandler('spam.log')
fh.setLevel(logging.DEBUG)
logger.addHandler(fh)

你可以开始了。

附注:一定要阅读日志指南。

2011-06-17 13:48:59

http://docs.python.org/library/logging.handlers.html#filehandler

FileHandler类位于核心日志包中，它将日志输出发送到磁盘文件。

2011-06-17 13:45:32

import sys
import logging

from util import reducer_logfile
logging.basicConfig(filename=reducer_logfile, format='%(message)s',
                    level=logging.INFO, filemode='w')

2016-09-05 09:04:30