extract_text 2.0

from threading import Thread
import wx
import PyPDF2
import os

class MyFrame(wx.Frame):
    def __init__(self, parent, title):
        super().__init__(parent, title=title)
        self.panel = wx.Panel(self)
        vbox = wx.BoxSizer()
        self.static1 = wx.StaticText(self.panel, label="Please wait")
        self.gauge = wx.Gauge(self.panel, range=100, style=wx.GA_HORIZONTAL)
        self.gauge.SetCanFocus(True)
        vbox.Add(self.static1, flag=wx.ALL, border=0)
        vbox.Add(self.gauge, flag=wx.ALL, border=10)
        self.panel.SetSizer(vbox)
        open_dlg = wx.FileDialog(self.panel, "open file", os.getcwd(), "", "*.pdf", wx.FD_OPEN)
        if open_dlg.ShowModal() == wx.ID_CANCEL: self.Destroy()
        self.file_name = open_dlg.GetFilename()
        dir_name = open_dlg.GetDirectory()
        source_file_path = os.path.join(dir_name, self.file_name)
        open_dlg.Destroy()
        self.file_name= self.file_name.split(".")
        self.file_name[1] = ".txt"
        self.file_name = "".join(self.file_name)
        save_dlg = wx.DirDialog(self.panel, "save file", defaultPath="")
        if save_dlg.ShowModal() == wx.ID_CANCEL: self.Destroy()
        destination_file_path = os.path.join(save_dlg.GetPath(), self.file_name)
        save_dlg.Destroy()
        self.thr = Thread(target=self.show_progress, args=(source_file_path, destination_file_path))
        self.thr.start()
    def show_progress(self, source_file_path, destination_file_path):
        with open(source_file_path, "rb") as s_file:
            with open(destination_file_path, "w", encoding="utf-8") as d_file:
                reader = PyPDF2.PdfReader(s_file)
                for i in range(len(reader.pages)):
                    page = reader.pages[i]
                    d_file.write(page.extract_text())
                    progress = int((i + 1) / len(reader.pages) * 100)
                    self.gauge.SetValue(progress)
        self.Destroy()


app = wx.App()
my_frame = MyFrame(None, "test")
my_frame.Show()
my_frame.gauge.SetFocus()
my_frame.SetFocus()
app.MainLoop()