added python code for the ls command

Author: Luke-Manyamazi

implement-shell-tools/ls/ls.py

@@ -0,0 +1,28 @@
+import os
+import argparse
+
+def ls(path='.', one_column=False, show_hidden=False):
+    try:
+        files = os.listdir(path)
+        if not show_hidden:
+            files = [f for f in files if not f.startswith('.')]
+        files.sort()
+        
+        if one_column:
+            print(*files, sep='\n')
+        else:
+            print(*files)
+    except FileNotFoundError:
+        print(f"ls: cannot access '{path}': No such file or directory")
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-1', action='store_true', help='list one file per line')
+    parser.add_argument('-a', action='store_true', help='show hidden files')
+    parser.add_argument('path', nargs='?', default='.', help='directory to list')
+    args = parser.parse_args()
+    
+    ls(args.path, args.__dict__['1'], args.a)
+
+if __name__ == "__main__":
+    main()