How to get ride of "squares" in the TreeListCtl

I asked the same question on stackoverflow but nobody answered, from what I saw the community i more engaged in forums and groups than in stack…

I am using the following code to create a TreeList:

tree = wx.dataview.TreeListCtrl(self, -1, style=wx.TR_DEFAULT_STYLE | \
wx.TR_FULL_ROW_HIGHLIGHT | \
wx.TR_EDIT_LABELS
tree.AppendColumn("Item Name")
node = tree.AppendItem(parent_node, text)

And for some reason there’s an empty square (It looks like a checkbox, but it is not clickable… - see image bellow)

enter image description here

I even tried to add item as this:

node = tree.AppendItem(parent_node, text, wx.NO_IMAGE, wx.NO_IMAGE)

or

node = tree.AppendItem(parent_node, text)
tree.SetItemImage(node, wx.NO_IMAGE, wx.NO_IMAGE)

But none worked, when I remove the wx.TR_DEFAULT_STYLE style, the box is gone, but the space previously occupied remains there…