NameError:全局名称“记录器"未定义 [英] NameError: global name 'logger' is not defined
问题描述
我写了一个logging.json文件，从那里设置了日志配置，之后我创建了一个类，其中所有方法都可以在其中使用，但是当我在类内使用logger进行记录时，会抛出错误NameError: global name 'logger' is not defined
app.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()
logging.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
我使用此链接中下面的日志记录示例[ https://fangpenlin.com/posts/2012/08/26/good-logging-practice-in-python/]
关于如何解决此问题的任何建议都不是全局的，因此可以使它成为全局的.
您链接到的示例具有:
import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__) #<<<<<<<<<<<<<<<<<<<<
您错过了logger定义.
您可以将self.logger = logging.getLogger(__name__)放入Generic.__init__()函数中，也可以像在示例中那样在导入后立即定义全局logger.
I wrote a logging.json file from where the logging configuration is setup after which i created a class in which all my methods will be there but for logging when i use logger inside the class it is throwing error NameError: global name 'logger' is not defined
app.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()
logging.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"]
}
}
Problem :
When i run the program error
$ 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
Iam using the logging example following in this link [ https://fangpenlin.com/posts/2012/08/26/good-logging-practice-in-python/ ]
Any suggestions on how to solve this as logger is not global, any way to make it global.?
The example you link to has:
import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__) #<<<<<<<<<<<<<<<<<<<<
you missed the logger definition.
You can either put a self.logger = logging.getLogger(__name__) in your Generic.__init__() function, or define a global logger right after the import as in the example.
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