Traceback (most recent call last): File "C:\Documents and Settings\HP_Administrator\Desktop\IDE_proj.py", line 87, in ? editmenu.add_command(label="Cut", command= obj.cut (None)) File "C:\Documents and Settings\HP_Administrator\Desktop\IDE_proj.py", line 36, in cut self.copy() File "C:\Documents and Settings\HP_Administrator\Desktop\IDE_proj.py", line 32, in copy text = self.get("sel.first", "sel.last") File "C:\Python23\lib\lib-tk\Tkinter.py", line 2868, in get return self.tk.call(self._w, 'get', index1, index2)TclError: text doesn't contain any characters tagged with "sel"