Sort imports with isort.

This is the result of:

    $ isort --recursive examples templates transformers utils hubconf.py setup.py

examples/distillation/scripts/binarized_data.py

@@ -16,12 +16,15 @@
 Preprocessing script before distillation.
 """
 import argparse
+import logging
 import pickle
 import random
 import time
+
 import numpy as np
-from transformers import BertTokenizer, RobertaTokenizer, GPT2Tokenizer
-import logging
+
+from transformers import BertTokenizer, GPT2Tokenizer, RobertaTokenizer
+
 
 logging.basicConfig(
     format="%(asctime)s - %(levelname)s - %(name)s -   %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO

examples/distillation/scripts/extract.py

@@ -16,10 +16,13 @@
 Preprocessing script before training the distilled model.
 Specific to RoBERTa -> DistilRoBERTa and GPT2 -> DistilGPT2.
 """
-from transformers import BertForMaskedLM, RobertaForMaskedLM, GPT2LMHeadModel
-import torch
 import argparse
 
+import torch
+
+from transformers import BertForMaskedLM, GPT2LMHeadModel, RobertaForMaskedLM
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="Extraction some layers of the full RobertaForMaskedLM or GPT2LMHeadModel for Transfer Learned Distillation"

examples/distillation/scripts/extract_distilbert.py

@@ -16,10 +16,13 @@
 Preprocessing script before training DistilBERT.
 Specific to BERT -> DistilBERT.
 """
-from transformers import BertForMaskedLM, RobertaForMaskedLM
-import torch
 import argparse
 
+import torch
+
+from transformers import BertForMaskedLM, RobertaForMaskedLM
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="Extraction some layers of the full BertForMaskedLM or RObertaForMaskedLM for Transfer Learned Distillation"

examples/distillation/scripts/token_counts.py

@@ -15,10 +15,11 @@
 """
 Preprocessing script before training the distilled model.
 """
-from collections import Counter
 import argparse
-import pickle
 import logging
+import pickle
+from collections import Counter
+
 
 logging.basicConfig(
     format="%(asctime)s - %(levelname)s - %(name)s -   %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO