How do I replicate pythons logging library in a better way?

I want to create a library similair to logging in python. Example from python api below:

import logging
import mylib

def main():
    logging.basicConfig(filename='myapp.log', level=logging.INFO)
    logging.info('Started')
    mylib.do_something()
    logging.info('Finished')

if __name__ == '__main__':
    main()

import logging

def do_something():
    logging.info('Doing something')

INFO:root:Started

INFO:root:Doing something

INFO:root:Finished

Notice how logging was able to get its config set in one module and have the other module use it without the second module repeating. Currently, I can make something similar with global variables in the library... but that just feels sloppy.

str = '' 
def setStr(input):
   global str
   str = input
def getStr():
   retu str

Now I can import in modules and update them...

import library
import module2

library.setStr('wow')
module2.run()

import library

def run():
        print(library.getStr())

wow

For my project I will have to use a lot of global variables and it will look sloppy. So how do I do this? Thanks in advance.