Fix errors

exps/basic/xmain.py

@@ -74,8 +74,11 @@ def main(args):
     logger.log("The optimizer is:\n{:}".format(optimizer))
     logger.log("The objective is {:}".format(objective))
     logger.log("The metric is {:}".format(metric))
-    logger.log("The iters_per_epoch = {:}, estimated epochs = {:}".format(
-      iters_per_epoch, args.steps // iters_per_epoch))
+    logger.log(
+        "The iters_per_epoch = {:}, estimated epochs = {:}".format(
+            iters_per_epoch, args.steps // iters_per_epoch
+        )
+    )
 
     model, objective = torch.nn.DataParallel(model).cuda(), objective.cuda()
     scheduler = xmisc.LRMultiplier(

xautodl/xmisc/meter_utils.py

@@ -1,6 +1,12 @@
 #####################################################
 # Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2020.06 #
 #####################################################
+# In this python file, it contains the meter classes#
+# , which may need to use PyTorch or Numpy.         #
+#####################################################
+import abc
+import torch
+import torch.nn.functional as F
 
 
 class AverageMeter: