记录模块
为了演示该方法logging模块,这将是一般方法
import logging
# Create a logging instance
logger = logging.getLogger('my_application')
logger.setLevel(logging.INFO) # you can set this to be DEBUG, INFO, ERROR
# Assign a file-handler to that instance
fh = logging.FileHandler("file_dir.txt")
fh.setLevel(logging.INFO) # again, you can set this differently
# Format your logs (optional)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
fh.setFormatter(formatter) # This will set the format to the file handler
# Add the handler to your logging instance
logger.addHandler(fh)
try:
raise ValueError("Some error occurred")
except ValueError as e:
logger.exception(e) # Will send the errors to the file
如果我cat file_dir.txt
2019-03-14 14:52:50,676 - my_application - ERROR - Some error occurred
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ValueError: Some error occurred
打印到文件
正如我在评论中指出的,你could完成这个与print
以及(我不确定你会因此而鼓掌)
# Set your stdout pointer to a file handler
with open('my_errors.txt', 'a') as fh:
try:
raise ValueError("Some error occurred")
except ValueError as e:
print(e, file=fh)
cat my_errors.txt
Some error occurred
注意logging.exception
includes在这种情况下的回溯,这是该模块的众多巨大好处之一
Edit
为了完整起见,traceback模块利用类似的方法print
,您可以在其中提供文件句柄:
import traceback
import sys
with open('error.txt', 'a') as fh:
try:
raise ValueError("Some error occurred")
except ValueError as e:
e_type, e_val, e_tb = sys.exc_info()
traceback.print_exception(e_type, e_val, e_tb, file=fh)
这将包括您想要的所有信息logging