Add ls.py and setup the basic program.

Author: anosidium

implement-shell-tools/ls/ls.py

@@ -0,0 +1,20 @@
+import argparse
+import os
+
+parser = argparse.ArgumentParser(prog="ls",
+                                 description="simple ls clone")
+
+parser.add_argument("-1",
+                    dest="one_per_line",
+                    action="store_true",
+                    help="list one file per line")
+
+parser.add_argument("-a",
+                    action="store_true",
+                    help="show hidden files")
+
+parser.add_argument("filepath",
+                    nargs="?",
+                    default=".")
+
+args = parser.parse_args()