AttributeError: 'TreeCtrl' object has no attribute 'GetItem'

So I've googled around on this error and found some others who've had this 
problem. But I can't seem to solve it for my own app.

I get the error from the bind event: def OnSelChanged(self, event): 

import wx
import os

class MainFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, parent=None, size=wx.Size(600, 400), pos=wx.Point(-
900, 400), title='TreeCtrl Demo')
# x y
self.tree = wx.TreeCtrl(self, wx.ID_ANY, size=wx.Size(240, 400), style=wx.TR_FULL_ROW_HIGHLIGHT 
| wx.TR_HAS_BUTTONS | wx.TR_NO_LINES)
self.tree.Bind(wx.EVT_TREE_SEL_CHANGED, OnSelChanged(self, self.tree), self
.tree)
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.tree,
1) # make vertically stretchable
self.SetSizer(vbox)

default_path = r'C:\Users\rfresh1011\Documents\pEdit'
self.root = self.tree.AddRoot(default_path)
traverse_directory_tree(self.root, default_path, self.tree)
self.tree.ExpandAll()

self.Show()

def OnSelChanged(self, event):
item = event.GetItem()
print(self.tree.GetItemText(item))

def traverse_directory_tree(parent, path, tree):
global glist_tree_node_id
global glist_tree_filenames
gstr_show_folders = '0'
if gstr_show_folders == '1':
for folder_name in filter(os.path.isdir, os.listdir(os.getcwd())):
# full_path = os.path.join(path, d)
isdir = os.path.isdir(path)
if isdir:
if not folder_name.startswith('.'):
tree.AppendItem(parent, folder_name)
for fn in os.listdir(path):
if fn.endswith('.py'):
if ".bak" in fn:
pass
else:
id2 = tree.AppendItem(parent, fn)

if __name__ == '__main__':
app = wx.App()
main_frame = MainFrame()
app.MainLoop()



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