How can I center the text I just changed?

Question

There is a static text in the center, which by clicking on the button changes to a random text from file.

And here's the problem itself: after pressing the button, the new text starts from the beginning of the previous peace text, not in the center.

How can the problem be solved?

import wx
import random

class TestWindow(wx.Frame):

    def chBtnClick(self, event):
        f = open("Words.txt", "r")
        random_word = random.choice(f.read().split("\n"))
        self.chText.SetLabel(random_word)
        
    def __init__(self, parent, title):
        wx.Frame.__init__(self, None, title=title, size=(300, 200))

        self.panel = wx.Panel(self, wx.ID_ANY)

        VSizer = wx.BoxSizer(wx.VERTICAL)

        self.chText = wx.StaticText(self.panel, wx.ID_ANY, label="Click Random")
        VSizer.Add(self.chText, 0, wx.CENTER | wx.ALL, 5)
        
        self.chBtn = wx.Button(self.panel, wx.ID_ANY, label="Random!")
        VSizer.Add(self.chBtn, 0, wx.CENTER|wx.ALL, 5)

        self.chBtn.Bind(wx.EVT_BUTTON, self.chBtnClick)

        self.panel.SetSizer(VSizer)
        self.Centre()
        self.Show()

if __name__ == "__main__":
    app = wx.App()
    frame = TestWindow(None, "ExBurate Test ver.")
    app.MainLoop()

Before button

After button

Answer 1

After change the text call self.panel.Layout() to re-center object

def chBtnClick(self, event):
    f = open("Words.txt", "r")
    random_word = random.choice(f.read().split("\n"))
    self.chText.SetLabel(random_word)
    self.panel.Layout()