code: def log_every(self, iterable, print_freq, header=None):
      i = 0
      if not header:
          header = ""
      start_time = time.time()
      end = time.time()
      iter_time = SmoothedValue(fmt="{avg:.4f}")
      data_time = SmoothedValue(fmt="{avg:.4f}")
      space_fmt = ":" + str(len(str(len(iterable)))) + "d"
      if torch.cuda.is_available():
          log_msg = self.delimiter.join(
              [
                  header,
                  "[{0" + space_fmt + "}/{1}]",
                  "eta: {eta}",
                  "{meters}",
                  "time: {time}",
                  "data: {data}",
                  "max mem: {memory:.0f}",
              ]
          )
      else:
          log_msg = self.delimiter.join(
              [
                  header,
                  "[{0" + space_fmt + "}/{1}]",
                  "eta: {eta}",
                  "{meters}",
                  "time: {time}",
                  "data: {data}",
              ]
          )
      MB = 1024.0 * 1024.0
      for obj in iterable:
          data_time.update(time.time() - end)
          yield obj
          iter_time.update(time.time() - end)
          if i % print_freq == 0:
              eta_seconds = iter_time.global_avg * (len(iterable) - i)
              eta_string = str(
                  datetime.timedelta(seconds=int(eta_seconds))
              )
              if torch.cuda.is_available():
                  print(
                      log_msg.format(
                          i,
                          len(iterable),
                          eta=eta_string,
                          meters=str(self),
                          time=str(iter_time),
                          data=str(data_time),
                          memory=torch.cuda.max_memory_allocated() / MB,
                      )
                  )
              else:
                  print(
                      log_msg.format(
                          i,
                          len(iterable),
                          eta=eta_string,
                          meters=str(self),
                          time=str(iter_time),
                          data=str(data_time),
                      )
                  )
          i += 1
          end = time.time()
      total_time = time.time() - start_time
      total_time_str = str(datetime.timedelta(seconds=int(total_time)))
      print(f"{header} Total time: {total_time_str}")
  
imports: import datetime
  import errno
  import os
  import time
  from collections import defaultdict, deque
  import torch
  import torch.distributed
label_desc: Use image node_id 7 for calling the MetricLogger obj's underlying member method code with example usage: obj.log_every(iterable, print_freq, header) without return types