Change logging "print" function to "tqdm.write" so logging doesn't interfere with progress bars

Question

I have a simple question: How do I change the built-in Python logger's print function to tqdm.write such that logging messages do not interfere with tqdm's progress bars? Thanks!

Answer 1

You need a custom logging handler:

import logging import tqdm  class TqdmLoggingHandler(logging.Handler):     def __init__(self, level=logging.NOTSET):         super().__init__(level)      def emit(self, record):         try:             msg = self.format(record)             tqdm.tqdm.write(msg)             self.flush()         except Exception:             self.handleError(record)   

and then add this to the logging chain:

import time  log = logging.getLogger(__name__) log.setLevel(logging.INFO) log.addHandler(TqdmLoggingHandler()) for i in tqdm.tqdm(range(100)):     if i == 50:         log.info("Half-way there!")     time.sleep(0.1) 

Edit: Fixed a bug in the call to super TqdmLoggingHandler's init method, that was pointed out by diligent reader @BlaineRogers in the comments. (If anyone wants to read further about this murky area of Python, I recommend https://fuhm.net/super-harmful/)