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"""
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# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
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https://github.com/facebookresearch/detr/blob/main/util/misc.py
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Mostly copy-paste from torchvision references.
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"""
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import datetime
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import pickle
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import time
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from collections import defaultdict, deque
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from typing import Dict
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import torch
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import torch.distributed as tdist
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from .dist_utils import get_world_size, is_dist_available_and_initialized
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class SmoothedValue(object):
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"""Track a series of values and provide access to smoothed values over a
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window or the global series average.
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"""
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def __init__(self, window_size=20, fmt=None):
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if fmt is None:
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fmt = "{median:.4f} ({global_avg:.4f})"
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self.deque = deque(maxlen=window_size)
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self.total = 0.0
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self.count = 0
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self.fmt = fmt
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def update(self, value, n=1):
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self.deque.append(value)
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self.count += n
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self.total += value * n
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def synchronize_between_processes(self):
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"""
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Warning: does not synchronize the deque!
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"""
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if not is_dist_available_and_initialized():
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return
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t = torch.tensor([self.count, self.total], dtype=torch.float64, device="cuda")
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tdist.barrier()
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tdist.all_reduce(t)
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t = t.tolist()
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self.count = int(t[0])
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self.total = t[1]
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@property
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def median(self):
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d = torch.tensor(list(self.deque))
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return d.median().item()
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@property
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def avg(self):
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d = torch.tensor(list(self.deque), dtype=torch.float32)
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return d.mean().item()
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@property
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def global_avg(self):
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return self.total / self.count
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@property
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def max(self):
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return max(self.deque)
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@property
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def value(self):
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return self.deque[-1]
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def __str__(self):
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return self.fmt.format(
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median=self.median,
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avg=self.avg,
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global_avg=self.global_avg,
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max=self.max,
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value=self.value,
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)
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def all_gather(data):
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"""
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Run all_gather on arbitrary picklable data (not necessarily tensors)
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Args:
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data: any picklable object
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Returns:
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list[data]: list of data gathered from each rank
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"""
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world_size = get_world_size()
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if world_size == 1:
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return [data]
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buffer = pickle.dumps(data)
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storage = torch.ByteStorage.from_buffer(buffer)
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tensor = torch.ByteTensor(storage).to("cuda")
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local_size = torch.tensor([tensor.numel()], device="cuda")
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size_list = [torch.tensor([0], device="cuda") for _ in range(world_size)]
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tdist.all_gather(size_list, local_size)
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size_list = [int(size.item()) for size in size_list]
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max_size = max(size_list)
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tensor_list = []
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for _ in size_list:
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tensor_list.append(torch.empty((max_size,), dtype=torch.uint8, device="cuda"))
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if local_size != max_size:
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padding = torch.empty(size=(max_size - local_size,), dtype=torch.uint8, device="cuda")
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tensor = torch.cat((tensor, padding), dim=0)
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tdist.all_gather(tensor_list, tensor)
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data_list = []
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for size, tensor in zip(size_list, tensor_list):
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buffer = tensor.cpu().numpy().tobytes()[:size]
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data_list.append(pickle.loads(buffer))
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return data_list
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def reduce_dict(input_dict, average=True) -> Dict[str, torch.Tensor]:
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"""
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Args:
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input_dict (dict): all the values will be reduced
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average (bool): whether to do average or sum
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Reduce the values in the dictionary from all processes so that all processes
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have the averaged results. Returns a dict with the same fields as
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input_dict, after reduction.
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"""
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world_size = get_world_size()
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if world_size < 2:
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return input_dict
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with torch.no_grad():
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names = []
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values = []
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for k in sorted(input_dict.keys()):
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names.append(k)
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values.append(input_dict[k])
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values = torch.stack(values, dim=0)
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tdist.all_reduce(values)
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if average:
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values /= world_size
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reduced_dict = {k: v for k, v in zip(names, values)}
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return reduced_dict
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class MetricLogger(object):
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def __init__(self, delimiter="\t"):
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self.meters = defaultdict(SmoothedValue)
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self.delimiter = delimiter
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def update(self, **kwargs):
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for k, v in kwargs.items():
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if isinstance(v, torch.Tensor):
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v = v.item()
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assert isinstance(v, (float, int))
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self.meters[k].update(v)
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def __getattr__(self, attr):
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if attr in self.meters:
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return self.meters[attr]
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if attr in self.__dict__:
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return self.__dict__[attr]
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raise AttributeError("'{}' object has no attribute '{}'".format(type(self).__name__, attr))
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def __str__(self):
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loss_str = []
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for name, meter in self.meters.items():
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loss_str.append("{}: {}".format(name, str(meter)))
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return self.delimiter.join(loss_str)
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def synchronize_between_processes(self):
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for meter in self.meters.values():
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meter.synchronize_between_processes()
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def add_meter(self, name, meter):
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self.meters[name] = meter
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def log_every(self, iterable, print_freq, header=None):
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i = 0
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if not header:
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header = ""
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start_time = time.time()
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end = time.time()
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iter_time = SmoothedValue(fmt="{avg:.4f}")
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data_time = SmoothedValue(fmt="{avg:.4f}")
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space_fmt = ":" + str(len(str(len(iterable)))) + "d"
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if torch.cuda.is_available():
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log_msg = self.delimiter.join(
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[
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header,
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"[{0" + space_fmt + "}/{1}]",
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"eta: {eta}",
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"{meters}",
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"time: {time}",
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"data: {data}",
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"max mem: {memory:.0f}",
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]
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)
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else:
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log_msg = self.delimiter.join(
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[
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header,
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"[{0" + space_fmt + "}/{1}]",
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"eta: {eta}",
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"{meters}",
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"time: {time}",
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"data: {data}",
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]
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)
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MB = 1024.0 * 1024.0
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for obj in iterable:
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data_time.update(time.time() - end)
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yield obj
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iter_time.update(time.time() - end)
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if i % print_freq == 0 or i == len(iterable) - 1:
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eta_seconds = iter_time.global_avg * (len(iterable) - i)
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eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
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if torch.cuda.is_available():
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print(
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log_msg.format(
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i,
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len(iterable),
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eta=eta_string,
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meters=str(self),
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time=str(iter_time),
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data=str(data_time),
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memory=torch.cuda.max_memory_allocated() / MB,
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)
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)
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else:
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print(
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log_msg.format(
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i,
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len(iterable),
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eta=eta_string,
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meters=str(self),
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time=str(iter_time),
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data=str(data_time),
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)
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)
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i += 1
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end = time.time()
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total_time = time.time() - start_time
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total_time_str = str(datetime.timedelta(seconds=int(total_time)))
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print(
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"{} Total time: {} ({:.4f} s / it)".format(
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header, total_time_str, total_time / len(iterable)
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)
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)
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