NameError: 全局名称 'logger' 未定义

Question

我从设置日志记录配置的位置编写了一个 logging.json 文件，之后我创建了一个类，其中我的所有方法都将在那里但是当我在类中使用记录器时，它会抛出错误 NameError: global name 'logger' is not defined

应用程序.py

 #/usr/bin/python

import sys
import logging
import time
import json
import os
import logging.config

def setup_logging(default_path='logging.json',default_level=logging.INFO,env_key='LOG_CFG'):
    """Setup logging configuration"""
    path = default_path
    value = os.getenv(env_key, None)
    if value:
        path = value
    if os.path.exists(path):
        with open(path, 'rt') as f:
            config = json.load(f)
        logging.config.dictConfig(config)
    else:
        logging.basicConfig(level=default_level)

class Generic:

        def __init__(self , file_path):
                self.file_path = file_path

        def check_mime(self):
                logger.info('Generic on file {} starts at {}'.format(file_path , time.time()))

print 'File path is {}'.format(sys.argv[1])
file_path = sys.argv[1]

def parser():
        parser = Generic(file_path)
        parser.check_mime()
def main():
        print 'This is intended for module purpose only'
        setup_logging()
        parser()

if __name__ == '__main__':
        main()

日志记录.json

 {
    "version": 1,
    "disable_existing_loggers": false,
    "formatters": {
        "simple": {
            "format": "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
        }
    },

    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
            "level": "DEBUG",
            "formatter": "simple",
            "stream": "ext://sys.stdout"
        },

        "info_file_handler": {
            "class": "logging.handlers.RotatingFileHandler",
            "level": "INFO",
            "formatter": "simple",
            "filename": "logs/gp.log",
            "maxBytes": 10485760,
            "backupCount": 20,
            "encoding": "utf8"
        },

        "error_file_handler": {
            "class": "logging.handlers.RotatingFileHandler",
            "level": "ERROR",
            "formatter": "simple",
            "filename": "logs/errors.log",
            "maxBytes": 10485760,
            "backupCount": 20,
            "encoding": "utf8"
        }
    },

    "loggers": {
        "my_module": {
            "level": "ERROR",
            "handlers": ["console"],
            "propagate": "no"
        }
    },

    "root": {
        "level": "INFO",
        "handlers": ["console", "info_file_handler", "error_file_handler"]
    }
}

问题 ：

当我运行程序错误

$ python app.py /home/default/domain.txt
File path is /home/default/domain.txt
This is intended for module purpose only
Traceback (most recent call last):
  File "app.py", line 44, in <module>
    main()
  File "app.py", line 41, in main
    parser()
  File "app.py", line 37, in parser
    parser.check_mime()
  File "app.py", line 29, in check_mime
    logger.info('GenericParser
NameError: global name 'logger' is not defined

我正在使用此链接中的日志记录示例 [ https://fangpenlin.com/posts/2012/08/26/good-logging-practice-in-python/ ]

关于如何解决这个问题的任何建议，因为记录器不是全球性的，任何让它成为全球性的方法。？

原文由 SaiKiran 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您链接到的示例有：

 import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__) #<<<<<<<<<<<<<<<<<<<<

你错过了 logger 定义。

您可以将 self.logger = logging.getLogger(__name__) 放入 Generic.__init__() 函数中，或者在导入之后立即定义全局 logger 就像示例中那样。

原文由 GPhilo 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

以下应添加到您的代码中

logger=None
def setup():
   logger.debug('put some text')
   return 0

def main():
   global logger
   logger = logging.getLogger('give_some_logger_name')
   logger.setLevel(logging.DEBUG)

   ret = setup()

原文由 Chetan_Vasudevan 发布，翻译遵循 CC BY-SA 4.0 许可协议