meters.py

from collections import OrderedDict


class AverageMeter(object):
    """Computes and stores the average and current value"""

    def __init__(self, name, fmt=":f"):
        self.name = name
        self.fmt = fmt
        self.reset()

    def reset(self):
        self.val = 0
        self.avg = 0
        self.sum = 0
        self.count = 0

    def update(self, val, n=1):
        self.val = val
        self.sum += val * n
        self.count += n
        self.avg = self.sum / self.count

    def __str__(self):
        fmtstr = "{name} {val" + self.fmt + "} ({avg" + self.fmt + "})"
        return fmtstr.format(**self.__dict__)


class ProgressMeter(object):
    def __init__(self, total_iters, meter_names, prefix=""):
        self.iter_fmtstr = self._get_iter_fmtstr(total_iters)
        self.meters = OrderedDict({mn: AverageMeter(mn, ":6.3f") for mn in meter_names})
        self.prefix = prefix

    def update(self, n=1, **kwargs):
        for k, v in kwargs.items():
            self.meters[k].update(v, n=n)

    def display(self, iteration):
        entries = [self.prefix + self.iter_fmtstr.format(iteration)]
        entries += [str(meter) for meter in self.meters.values()]
        print("\t".join(entries))

    def _get_iter_fmtstr(self, total_iters):
        num_digits = len(str(total_iters // 1))
        fmt = "{:" + str(num_digits) + "d}"
        return "[" + fmt + "/" + fmt.format(total_iters) + "]"