diff --git a/ngshare_exchange/course_management.py b/ngshare_exchange/course_management.py
index 1567d9a..5acd6c1 100644
--- a/ngshare_exchange/course_management.py
+++ b/ngshare_exchange/course_management.py
@@ -7,6 +7,7 @@
 import argparse
 from urllib.parse import quote
 
+
 # https://www.geeksforgeeks.org/print-colors-python-terminal/
 def prRed(skk, exit=True):
     print('\033[91m {}\033[00m'.format(skk))
diff --git a/ngshare_exchange/exchange.py b/ngshare_exchange/exchange.py
index 4b5ccae..9a58967 100644
--- a/ngshare_exchange/exchange.py
+++ b/ngshare_exchange/exchange.py
@@ -189,7 +189,7 @@ def decode_dir(self, src_dir, dest_dir, ignore=None, noclobber=False):
 
     def encode_dir(self, src_dir, ignore=None):
         encoded_files = []
-        for (subdir, dirs, files) in os.walk(src_dir):
+        for subdir, dirs, files in os.walk(src_dir):
             for file_name in files:
                 file_path = subdir + os.sep + file_name
                 data_bytes = open(file_path, 'rb').read()