Logging in Python with Config File - Using handlers defined in file through code

I am using logging module of python. How can I access the handlers defined in config file from the code. As an example, I have a logger defined and two handlers - one for screen and other for file. I want to use appropriate handler based on user preference (whether they want to log on screen or to a file). How can I dynamically add and remove handlers defined in config file from loggers defined in config file?

[loggers]

keys=root,netmap

[handlers]
keys=fil,screen

[logger_root]
level=NOTSET
handlers=

[logger_netmap]
level=INFO
handlers=fil,screen
qualname=netmap

[formatters]
keys = simple

[formatter_simple]
format=%(asctime)s - %(name)s - %(levelname)s - %(message)s
datefmt=

[handler_fil]
class=handlers.RotatingFileHandler
args=('file.log','a','maxBytes=10000','backupCount=5')
formatter=simple

[handler_screen]
class=StreamHandler
args = (sys.stdout,)
formatter=simple

Depending on whether user runs the program with -v or not I need to use one of File or Screen Handler. How can I add or delete fil or screen handlers from netmap logger?