[listbox] Loop through items and select hits?

Hello,

After filling a listbox with items, the user must be able to 1) search for a string, and 2) have the application highlight all the items in the listbox that contain that string.

I’m almost there, but listbox.SetSelection() expects an integer: How do I get the item’s index from its string?

class ListBoxFrame(wx.Frame):
	def __init__(self, *args, **kwargs):  
		...
		self.lb1 = wx.ListBox(panel, style=(wx.LB_MULTIPLE | wx.LB_ALWAYS_SB))
		sizer.Add(self.lb1,1, wx.ALL | wx.EXPAND ,5)
		...
		
	def OnSearchButtonClick(self,event):
		self.search_btn.Disable()
		if (search := self.textbox.GetValue()):
			for item in self.lb1.Items:
				#found string in current list item
				if search in item:
						#HERE
						self.lb1.SetSelection(int)
		else:
			self.statusbar.SetStatusText("Please type")
		self.search_btn.Enable()

Cheers,