[+] row_index == -1

frames/CTkTableFrame.py

@@ -166,6 +166,9 @@ class CTkTableFrame(ctk.CTkFrame):
     def edit(self, row_index, new_data=None, color=None, disable=False, **__):
         """Редактирует строку по индексу."""
 
+        if row_index == -1:
+            row_index = len(self._data) - 1
+
         def _disable_colors(widget):
             widget.unbind("<Enter>")
             widget.unbind("<Leave>")