[Tkinter] Label doesn't refresh

[jollydragon]

It doesn't have to be in __init__.
This is a habit of mine as I tend to access from several methods, but it can be used in local scope.

No, it doesn't work in local scope.
I moved it to local scope as the code below and you can try.
You'll find the label doesn't refresh correctly if changing the directory path from a long one to short.

import tkinter
import tkinter.filedialog
import os
 
 
class fileData:
 
     def __init__(self):
          self.targetDir = "./"
          self.mainWin = tkinter.Tk()
 
     def reportShow(self):          
 
          ln1 = 2
          absPathv = tkinter.StringVar()
          tkinter.Label(self.mainWin, text = "     Target   ",justify = tkinter.LEFT).grid(row = ln1, column =0)
          absPath = os.path.abspath(self.targetDir)
          if len(absPath) > 40:  absPath = ' ...%s' % absPath[-37:]
          absPathv.set(absPath)
          tkinter.Label(self.mainWin, textvariable = absPathv, background='white').grid(row = ln1, column = 1, columnspan = 3)                    
 
 
def chooseFolder():                                                   #This is where we lauch the directory change bar
     filesData.targetDir = tkinter.filedialog.askdirectory(title = "Choose the target directory", initialdir=filesData.targetDir)
     filesData.reportShow()
      
  
      
def showMain():
     mainWin = filesData.mainWin
      
     winSize = 360     
     mainWin.geometry('%dx%d+%d+%d' % (winSize, winSize, (mainWin.winfo_screenwidth()-winSize)/2,
                    (mainWin.winfo_screenheight()-winSize)/2))        #The size and position of the main window
     mainWin.minsize(winSize,winSize)
     mainWin.bind('<Control-o>',lambda event: chooseFolder())
 
     filesData.reportShow()
     mainWin.mainloop()
 
 
filesData = fileData()
 
 
if __name__=="__main__":
    showMain()