No text return in ListItem.GetText()

[bvrl]

Operating system: Windows-7-6.1.7601-SP1
wxPython version: 4.0.0rc1.dev3456+e141c95
Python version: 2.7.13

Description of the problem: I created an Editable ListControl, when edit a field I want to catch the changement string (=text). This is done in a eventhandler OnMixUpdate() triggered by wx.EVT_LIST_END_LABEL_EDIT . With event.GetItem() I access the correct listItem but when I do Getext() it returns an empty string. Also wxPyDeprecationWarning is given on listctrl.py:655

import wx
import wx.lib.mixins.listctrl  as  listmix
import sys
import platform
 
########################################################################
class EditableListCtrl(wx.ListCtrl, listmix.TextEditMixin):
    ''' TextEditMixin allows any column to be edited. '''
 
    #----------------------------------------------------------------------
    def __init__(self, parent, ID=wx.ID_ANY, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        """Constructor"""
        wx.ListCtrl.__init__(self, parent, ID, pos, size, style)
        listmix.TextEditMixin.__init__(self)
 
########################################################################
class MyPanel(wx.Panel):
    """"""
 
    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent)
 
        rows = [("Ford", "Taurus", "1996", "Blue"),
                ("Nissan", "370Z", "2010", "Green"),
                ("Porche", "911", "2009", "Red")
                ]
        self.list_ctrl = EditableListCtrl(self, style=wx.LC_REPORT)
 
        self.list_ctrl.InsertColumn(0, "Make")
        self.list_ctrl.InsertColumn(1, "Model")
        self.list_ctrl.InsertColumn(2, "Year")
        self.list_ctrl.InsertColumn(3, "Color")
 
        index = 0
        for row in rows:
            self.list_ctrl.InsertItem(index, row[0])
            self.list_ctrl.SetItem(index, 1, row[1])
            self.list_ctrl.SetItem(index, 2, row[2])
            self.list_ctrl.SetItem(index, 3, row[3])
            index += 1
 
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.list_ctrl, 0, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)
        self.Bind(wx.EVT_LIST_END_LABEL_EDIT, self.OnMixUpdate, self.list_ctrl)
        
    def OnMixUpdate(self, event):
        rowid = event.GetIndex()
        colid = event.GetColumn()
        new_data = event.GetItem()
        #print  event.GetItemData()  #Works perfectly with wxpython 2.9, gives string with last given value.
        print type(new_data)
        print new_data.GetText()   #Problem prints empty string

        olddata=self.list_ctrl.GetItem(itemIdx=rowid, col=colid).GetText()

        print "COL ID:%s\tROW ID:%s\t ROW OLD:%s\t NEW:%s\t"%(colid,rowid,olddata,new_data.GetText())
        event.Skip()  
 
 
########################################################################
class MyFrame(wx.Frame):
    """"""
 
    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, wx.ID_ANY, "Editable List Control")
        panel = MyPanel(self)
        self.Show()
        print sys.version_info
        print platform.platform()
        print 'wxversion: %s'%wx.__version__
    #----------------------------------------------------------------------
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()

Output: (I changed 911 to 9110):
sys.version_info(major=2, minor=7, micro=13, releaselevel='final', serial=0)
Windows-7-6.1.7601-SP1
wxversion: 4.0.0rc1.dev3456+e141c95
<class 'wx._core.ListItem'>

COL ID:1 ROW ID:2 ROW OLD:911 NEW:
C:\Python27\lib\site-packages\wx\lib\mixins\listctrl.py:655: wxPyDeprecationWarning: Call to deprecated item. Use SetItem instead.
self.SetStringItem(self.curRow, self.curCol, text)

[bvrl]

It seems that I'm not alone having this problem:
https://stackoverflow.com/questions/46692363/wxpython-phoenix-editable-listctrl-unable-to-access-the-changed-data