>

import logging

logger = logging.getLogger('mylogger')
logger.setLevel(logging.INFO)

fh=logging.handlers.RotatingFileHandler('/tmp/test.log', mode = 'a', maxBytes=10240, backupCount=3, encoding='utf-8')

formatter = logging.Formatter('%(asctime)s - %(filename)s[line:%(lineno)d] - %(levelname)s - %(message)s')
fh.setFormatter(formatter)

logger.addHandler(fh)

logger.info('hello logging')
logger.warning('hello logging')
logger.error('hello logging')
logger.critical('hello logging')

run times error:

AttributeError: ‘module’ object has no attribute ‘handlers’

import logging
import logging.handlers
……

Rerun, the program output normally.

import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
import Logging
Therefore, it is necessary to explicitly import the logging.handlers submodule in the access TAB.

but sometimes, when importing some package does not require additional action will automatically import its module, this is because the set of packages for these operations in py files. In other cases, something else you import might also import logging.handlers. Anyway, just make sure that before visiting

The corresponding submodule has already been imported. Sometimes a module that looks like a package is not, such as OS and OS.Path. OS is not a package, it just provides another module called path, which you can access through os.path.

str.split(str="", num=string.count(str)).

parameter
STR – The delimiter, which defaults to all null characters, including Spaces, newlines (\n), tabs (\t), and so on. Num – number of splits.
The return value
Returns a list of partitioned strings.
The instance
The following example shows how to use the split() function:

#!/usr/bin/python

str = "Line1-abcdef \nLine2-abc \nLine4-abcd";
print str.split( );
print str.split(' ', 1 );

The output of the above example is as follows:

['Line1-abcdef', 'Line2-abc', 'Line4-abcd']
['Line1-abcdef', '\nLine2-abc \nLine4-abcd']