import logging
import logging.handlers

#logging.thread=None  # this line also doesn't solve the problem

class LoggingExample:
    def __init__(self):
        self.refresh()

    def refresh(self):
        self.logger = logging.getLogger('Example')
        formatter = logging.Formatter('%(asctime)s  %(module)s %(lineno)d %(levelname)s %(message)s')
        self.rotatingFileLogHandler=logging.handlers.RotatingFileHandler("C:\log.txt",'a',200000,5)
    	self.logger.setLevel(logging.INFO)         
        self.rotatingFileLogHandler.setFormatter(formatter)
    	self.logger.addHandler(self.rotatingFileLogHandler)
        self.logger.info("Logging started")


log = LoggingExample()
for i in range(0,5000000):
	log.refresh() # if I comment out this line, it works (strange, isn't it)
	log.logger.info(" I am line number "+str(i))
sys.exit(0)