how to write log base e in python code example

Example 1: create log in python

logging.basicConfig(filename="logfilename.log", level=logging.INFO)
# Log Creation

logging.info('your text goes here')
logging.error('your text goes here')
logging.debug('your text goes here')

Example 2: python fme logger

logger = fmeobjects.FMELogFile()
logger.logMessageString("{}".format('Error'), fmeobjects.FME_ERROR)