diff --git a/vimtabdiff.py b/vimtabdiff.py
index 81ca92c..0b092ab 100755
--- a/vimtabdiff.py
+++ b/vimtabdiff.py
@@ -7,20 +7,24 @@ import itertools
 import tempfile
 import subprocess
 
+
 def star(f):
     """ see https://stackoverflow.com/q/21892989 """
     return lambda args: f(*args)
 
+
 def parse_args():
-    parser = argparse.ArgumentParser(description="Show diff of files from two directories in vim tabs")
+    parser = argparse.ArgumentParser(
+        description="Show diff of files from two directories in vim tabs")
     parser.add_argument("pathA")
     parser.add_argument("pathB")
     parser.add_argument("--vim", help="vim command to run", default="vim")
     return parser.parse_args()
 
+
 def get_dir_info(dirname):
     if not dirname:
-        return [],[]
+        return [], []
     dirs, files = [], []
     dirp = pathlib.Path(dirname)
     for p in dirp.iterdir():
@@ -30,13 +34,16 @@ def get_dir_info(dirname):
             files.append(p)
     return dirs, files
 
+
 def get_pairs(aItems, bItems):
     aItems = [(item, 'A') for item in aItems]
     bItems = [(item, 'B') for item in bItems]
     abItems = aItems + bItems
     abItems.sort(key=star(lambda item, tag: (item.name, tag)))
-    for _, items in itertools.groupby(abItems, key=star(lambda item, _: item.name)):
-        items = list(items) # NOTE: python 3.10's match expression can make this better
+    for _, items in itertools.groupby(abItems,
+                                      key=star(lambda item, _: item.name)):
+        items = list(items)
+        # NOTE: python 3.10's match expression can make this better
         if len(items) == 2:
             (aItem, _), (bItem, _) = items
             yield aItem, bItem
@@ -47,6 +54,7 @@ def get_pairs(aItems, bItems):
             else:
                 yield None, item
 
+
 def get_file_pairs(a, b):
     aDirs, aFiles = get_dir_info(a)
     bDirs, bFiles = get_dir_info(b)
@@ -54,6 +62,7 @@ def get_file_pairs(a, b):
     for aDir, bDir in get_pairs(aDirs, bDirs):
         yield from get_file_pairs(aDir, bDir)
 
+
 def main():
     args = parse_args()
     vimCmdFile = tempfile.NamedTemporaryFile(mode='w', delete=False)
@@ -61,7 +70,9 @@ def main():
         for a, b in get_file_pairs(args.pathA, args.pathB):
             aPath = a.resolve() if a else os.devnull
             bPath = b.resolve() if b else os.devnull
-            print(f"tabedit {aPath} | diffthis | vsp {bPath} | diffthis | diffupdate", file=vimCmdFile)
+            print(
+                f"tabedit {aPath} | diffthis | vsp {bPath} | diffthis | diffupdate",
+                file=vimCmdFile)
         cmds = f"""
         tabfirst | tabclose
         call delete("{vimCmdFile.name}")
@@ -69,6 +80,6 @@ def main():
         print(cmds, file=vimCmdFile)
     subprocess.run(args.vim.split() + ["-S", vimCmdFile.name])
 
+
 if __name__ == '__main__':
     main()
-