Implement ls shell tool in Python

Author: ebrahimbeiati

implement-shell-tools/implement-shell-tools-python/ls/ls.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+import sys
+import os
+
+def list_directory(path, show_all, one_per_line):
+    try:
+        entries = os.listdir(path)
+        if show_all:
+            # Add . and .. when -a is used
+            entries = [".", ".."] + entries
+        else:
+            entries = [e for e in entries if not e.startswith(".")]
+
+        entries.sort(key=lambda x: (x not in (".", ".."), x))
+
+        for e in entries:
+            print(e)
+
+    except Exception as e:
+        print(f"Error reading directory {path}: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+def main():
+    args = sys.argv[1:]
+
+    show_all = "-a" in args
+    one_per_line = "-1" in args
+
+    dirs = [a for a in args if a not in ("-a", "-1")]
+
+    if not dirs:
+        dirs = [os.getcwd()]
+
+    for i, path in enumerate(dirs):
+            if os.path.isdir(path):
+                if len(dirs) > 1:
+                    print(f"{path}:")
+                list_directory(path, show_all, one_per_line)
+                if len(dirs) > 1 and i < len(dirs) - 1:
+                    print("")
+            else:
+                print(path)
+
+
+if __name__ == "__main__":
+    main()