Log training using your progress bar object; after `pbar.update` call `pbar.log` with whatever you want to store as kwargs.

logging.py

from tqdm import tqdm

class TrainingProgress(tqdm):
    """Make the progress bar store progress as it displays it when the log method is called."""
    def log(self, *args, **kwargs):
        if 'trace' not in self.__dict__.keys():
            self.trace = {}
        # store anything with an integer or float datatype in the trace dictionary
        # with global index as the key
        for k in kwargs:
            if type(kwargs[k]) == float or type(kwargs[k]) == int:
                if k not in self.trace:
                    self.trace[k] = [] # start logging this kwarg
                self.trace[k].append((self.n, kwargs[k]))
        # unpack all the most recent values stored into kwargs
        # so they're always displayed
        for k in self.trace:
            if k not in kwargs:
                kwargs[k] = self.trace[k][-1][1]
        try:
            super(TrainingProgress, self).set_postfix(*args, **kwargs)
        except Exception as exc:
            # cannot catch KeyboardInterrupt when using manual tqdm
            # as the interrupt will most likely happen on another statement
            self.sp(bar_style='danger')
            raise exc