For a program that takes information from the network I would like to display it in a table to make selections (calculate average, stdev ect.). I created a list of lists and I am trying to populate it into a treeview table. The table should show serial number, the parameters requested and their respected values. The populating works, but I get 3 duplicates of every row and the final row per serialnumber shows 7 duplicates (while my list of lists only shows 1 result per line). I've been struggling for some time to remove the duplicates and checked the suggestions here. Behind the '#' in the code below are the suggestions I found. Behind the '->' I mention the result. def displayInfo(): #tree.delete(*tree.get_children()) -> Shows no improvement at all for results in fullResults: # tree.delete(0, "end") -> doesn't run as it doesn't recognise command # tree.delete(*tree.get_children()) -> Shows no improvement at all for result in results: # tree.delete(*tree.get_children()) -> deletes the previous serialnumber for value in result: tree.insert('', 'end', values=result) Can you please point me to some direction? Continue reading...