added -1 flag, used ruff format command

Author: Nataliia74

implement-shell-tools/ls/ls.py

@@ -6,15 +6,21 @@
 import time
 
 parser = argparse.ArgumentParser(
-    prog = "ls-command",
-    description= "ls shell command on python"
+    prog="ls-command", description="ls shell command on python"
 )
 
-parser.add_argument("-l", action="store_true", help="Display long format description files")
-parser.add_argument("-a", action="store_true", help="Display hidden files along with visible")
+parser.add_argument("-1", action="store_true", dest="one", help="One file per line")
+parser.add_argument(
+    "-l", action="store_true", help="Display long format description files"
+)
+parser.add_argument(
+    "-a", action="store_true", help="Display hidden files along with visible"
+)
 parser.add_argument("path", nargs="*", default=["."], help="The file to search")
 
-args=parser.parse_args()
+
+args = parser.parse_args()
+
 
 def long_format(path, file):
     info = os.stat(path)
@@ -23,8 +29,7 @@ def long_format(path, file):
     owner = pwd.getpwuid(info.st_uid).pw_name
     group = grp.getgrgid(info.st_gid).gr_name
     mtime = time.strftime("%b %d %H:%M", time.localtime(info.st_mtime))
-    print (permissions, size_file, owner, group, mtime, file)
-
+    print(permissions, size_file, owner, group, mtime, file)
 
 
 for path in args.path:
@@ -37,23 +42,16 @@ def long_format(path, file):
     elif os.path.isdir(path):
         files = os.listdir(path)
 
-        if not args.a:
-            visible_files=[]
-            for file in files:
-                if not file.startswith("."):
-                    visible_files.append(file)
-            files=visible_files
-                    
-        for file in files:
-            full_file_path = os.path.join(path, file)
-
-            if args.l:
-                long_format(full_file_path, file)
-            else:
-                print(file)
-
-
-
-
+    if not args.a:
+        files = [file for file in files if not file.startswith(".")]
 
+    for file in files:
+        full_file_path = os.path.join(path, file)
 
+        if args.l:
+            long_format(full_file_path, file)
+        else:
+            if args.one:
+                print(file)
+            else:
+                print(file, "\n")