python日志控制台和文件输出包含重复的消息

Question

我已经为python flask项目实现了日志记录，为此我创建了一个模块logging_manager，代码为-

file_formatter = logging.Formatter(
'%(asctime)s - %(filename)s -  %(funcName)s - %(lineno)i - %(levelname)s - %(message)s')
console_formatter = logging.Formatter(
'%(asctime)s - %(filename)s -  %(funcName)s - %(lineno)i - %(levelname)s - %(message)s')
file_log_level = logging.DEBUG
console_log_level = logging.WARNING
root_logging_level = logging.INFO
logName = "main.log"
fileNamePrefix = settings.ROOT_DIR + '/logs/'
fileMaxBytes = 4e+6
backUpCount = 1
encoding = 'utf8'
def get_logger():
logger = logging.getLogger(logName)
filehandler = handlers.RotatingFileHandler(fileNamePrefix + logName,
maxBytes=fileMaxBytes, backupCount=backUpCount,
encoding=encoding)
filehandler.setFormatter(file_formatter)
filehandler.setLevel(file_log_level)
logger.addHandler(filehandler)
consolehandler = logging.StreamHandler(stream=sys.stdout)
consolehandler.setFormatter(console_formatter)
consolehandler.setLevel(console_log_level)
logger.addHandler(consolehandler)
logger.setLevel(root_logging_level)
return logger

并通过从logging_manager导入一个记录器在我的python脚本中使用它。

from logging_manager import get_logger
get_logger().error("wrong file type provided")

每次调用get_logger时，都会向其添加一条额外的消息。

我的输出是(你可以看到重复(-

2019-10-09 13:42:35,591 - fabric_api.py -  post - 32 - INFO - Fabric classification Model Triggered
2019-10-09 13:42:35,605 - fabric_api.py -  post - 38 - INFO - Started processing file - 7c6d4400-e002-11e9-984e-a86daadb0edd.png
2019-10-09 13:42:35,605 - fabric_api.py -  post - 38 - INFO - Started processing file - 7c6d4400-e002-11e9-984e-a86daadb0edd.png
2019-10-09 13:42:35,606 - fabric_api.py -  post - 45 - INFO - saved image to location - E:1570608755.6064117c6d4400-e002-11e9-984e-a86daadb0edd.png
2019-10-09 13:42:35,606 - fabric_api.py -  post - 45 - INFO - saved image to location - E:1570608755.6064117c6d4400-e002-11e9-984e-a86daadb0edd.png
2019-10-09 13:42:35,606 - fabric_api.py -  post - 45 - INFO - saved image to location - E:1570608755.6064117c6d4400-e002-11e9-984e-a86daadb0edd.png
2019-10-09 13:42:46,167 - fabric_api.py -  post - 54 - INFO - Completed fabric detection with result - {'image': '7c6d4400-e002-11e9-984e-a86daadb0edd.png', 'confidence_score': '0.9986871', 'predicted_class': 'Cotton'}
2019-10-09 13:42:46,167 - fabric_api.py -  post - 54 - INFO - Completed fabric detection with result - {'image': '7c6d4400-e002-11e9-984e-a86daadb0edd.png', 'confidence_score': '0.9986871', 'predicted_class': 'Cotton'}
2019-10-09 13:42:46,167 - fabric_api.py -  post - 54 - INFO - Completed fabric detection with result - {'image': '7c6d4400-e002-11e9-984e-a86daadb0edd.png', 'confidence_score': '0.9986871', 'predicted_class': 'Cotton'}
2019-10-09 13:42:46,167 - fabric_api.py -  post - 54 - INFO - Completed fabric detection with result - {'image': '7c6d4400-e002-11e9-984e-a86daadb0edd.png', 'confidence_score': '0.9986871', 'predicted_class': 'Cotton'}

我在这个项目中使用pycharm。

Answer 1

我在代码中发现了错误，我已经在get_logger((中初始化了logger。所以，每次我调用这个函数时，它都会一次又一次地创建一个新的记录器实例，并且我的消息会传递给每个记录器。

以下修改解决了我的问题-

logName = "main.log"
fileNamePrefix = settings.ROOT_DIR + '/logs/'
fileMaxBytes = 4e+6
backUpCount = 1
encoding = 'utf8'
logger = logging.getLogger(logName)
filehandler = handlers.RotatingFileHandler(fileNamePrefix + logName,
maxBytes=fileMaxBytes, backupCount=backUpCount,
encoding=encoding)
filehandler.setFormatter(file_formatter)
filehandler.setLevel(file_log_level)
logger.addHandler(filehandler)
consolehandler = logging.StreamHandler(stream=sys.stdout)
consolehandler.setFormatter(console_formatter)
consolehandler.setLevel(console_log_level)
logger.addHandler(consolehandler)
logger.setLevel(root_logging_level)
def get_logger():
return logger