diff --git a/utils/addjson.py b/utils/addjson.py
index 7fabe625e..013d14727 100755
--- a/utils/addjson.py
+++ b/utils/addjson.py
@@ -1,9 +1,7 @@
 #!/usr/bin/env python3
 # encoding: utf-8
-
 # Copyright 2018 Nagoya University (Tomoki Hayashi)
 #  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
-
 from __future__ import print_function
 from __future__ import unicode_literals
 
@@ -12,7 +10,6 @@ import codecs
 import json
 import logging
 import sys
-
 from distutils.util import strtobool
 
 from espnet.utils.cli_utils import get_commandline_args
@@ -23,17 +20,16 @@ is_python2 = sys.version_info[0] == 2
 def get_parser():
     parser = argparse.ArgumentParser(
         description="add multiple json values to an input or output value",
-        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-    )
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter, )
     parser.add_argument("jsons", type=str, nargs="+", help="json files")
     parser.add_argument(
         "-i",
         "--is-input",
         default=True,
         type=strtobool,
-        help="If true, add to input. If false, add to output",
-    )
-    parser.add_argument("--verbose", "-V", default=0, type=int, help="Verbose option")
+        help="If true, add to input. If false, add to output", )
+    parser.add_argument(
+        "--verbose", "-V", default=0, type=int, help="Verbose option")
     return parser
 
 
@@ -121,7 +117,8 @@ if __name__ == "__main__":
             out_add_dic = {}
             # add shape
             if "odim" in adddic and "olen" in adddic:
-                out_add_dic["shape"] = [int(adddic["olen"]), int(adddic["odim"])]
+                out_add_dic[
+                    "shape"] = [int(adddic["olen"]), int(adddic["odim"])]
             elif "odim" in adddic:
                 out_add_dic["shape"] = [int(adddic["odim"])]
             # add all other key value
@@ -143,13 +140,13 @@ if __name__ == "__main__":
 
     # ensure "ensure_ascii=False", which is a bug
     jsonstring = json.dumps(
-        {"utts": new_dic},
+        {
+            "utts": new_dic
+        },
         indent=4,
         ensure_ascii=False,
         sort_keys=True,
-        separators=(",", ": "),
-    )
-    sys.stdout = codecs.getwriter("utf-8")(
-        sys.stdout if is_python2 else sys.stdout.buffer
-    )
+        separators=(",", ": "), )
+    sys.stdout = codecs.getwriter("utf-8")(sys.stdout
+                                           if is_python2 else sys.stdout.buffer)
     print(jsonstring)
diff --git a/utils/scp2json.py b/utils/scp2json.py
index 8e8de3e08..e2a757665 100755
--- a/utils/scp2json.py
+++ b/utils/scp2json.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 # encoding: utf-8
-
 # Copyright 2017 Johns Hopkins University (Shinji Watanabe)
 #  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
 from __future__ import print_function
@@ -17,8 +16,7 @@ is_python2 = sys.version_info[0] == 2
 def get_parser():
     parser = argparse.ArgumentParser(
         description="convert scp to json",
-        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-    )
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter, )
     parser.add_argument("--key", "-k", type=str, help="key")
     return parser
 
@@ -28,10 +26,10 @@ if __name__ == "__main__":
     args = parser.parse_args()
 
     new_line = {}
-    sys.stdin = codecs.getreader("utf-8")(sys.stdin if is_python2 else sys.stdin.buffer)
-    sys.stdout = codecs.getwriter("utf-8")(
-        sys.stdout if is_python2 else sys.stdout.buffer
-    )
+    sys.stdin = codecs.getreader("utf-8")(sys.stdin
+                                          if is_python2 else sys.stdin.buffer)
+    sys.stdout = codecs.getwriter("utf-8")(sys.stdout
+                                           if is_python2 else sys.stdout.buffer)
     line = sys.stdin.readline()
     while line:
         x = line.rstrip().split()
@@ -43,6 +41,9 @@ if __name__ == "__main__":
 
     # ensure "ensure_ascii=False", which is a bug
     jsonstring = json.dumps(
-        all_l, indent=4, ensure_ascii=False, sort_keys=True, separators=(",", ": ")
-    )
+        all_l,
+        indent=4,
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ": "))
     print(jsonstring)