Change o flag to 1 for display per line

Author: RihannaP

implement-shell-tools/ls/ls.py

@@ -7,7 +7,7 @@
     )
 
 parser.add_argument("-a", action="store_true", help="Display all files include hidden files")
-parser.add_argument("-o", action="store_true", help="list one file per line")
+parser.add_argument("-1", action="store_true", help="list one file per line")
 parser.add_argument("dir", nargs="?", default=".", help="Directory to list, default curent directory")
 
 args = parser.parse_args()
@@ -18,7 +18,7 @@
     files = [f for f in files if not f.startswith(".")]
 files.sort()
 
-if args.o:
+if args.__dict__["1"]:
     for f in files:
         print(f)
 else: