Add FilePicker for config.ini

app.py

         self.BtacCopy = makeBtn(self, "4. Freies Buchstabieren", "lightblue", self.btn_tacCopy, TOP)
         self.BtacSimul = makeBtn(self, "5. Rollstuhlsimulator", "pink", self.btn_tacSimul, TOP)
         # self.BtacQuest = makeBtnSmall(self, "6. Fragebogen", "green", self.btn_tacQuest, TOP)
-        self.BtacConfig = makeBtnSmall(self, "Einstellungen", "gray", self.btn_config, TOP)
+        self.BtacConfig = makeBtnSmall(self, "Konfiguration", "gray", self.btn_config, TOP)
 
         frame.rowconfigure((0,1), weight=1)  # make buttons stretch when
         frame.columnconfigure((0,2), weight=1)  # when window is resized
     # 1. FILTER ##################################
     def btn_filter(self):
         print('Starte TactileBCIFilter.exe')
-        subprocess.Popen(config['PATH']['TactileBCIFilter'] + '\TactileBCIFilter.exe')
+        subprocess.Popen(config['PATH']['tactilebcifilter'] + '\TactileBCIFilter.exe')
 
     # 2. KALIBIERUNGEN ###########################
     def btn_tacCal(self):
         print('starte taktile Kalibrierung')
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\Operator.exe', '--OnConnect', '-LOAD PARAMETERFILE TactileCalibration.prm'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\gUSBampSource.exe', '127.0.0.1'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\P3SignalProcessing.exe', '127.0.0.1'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\P3Speller.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\Operator.exe', '--OnConnect', '-LOAD PARAMETERFILE TactileCalibration.prm'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\gUSBampSource.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\P3SignalProcessing.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\P3Speller.exe', '127.0.0.1'])
         # TODO Lock einführen und bei Returnwert Lock öffnen
 
     # 3. P300 Classifier #########################
     def btn_p300(self):
         print('Starte P300Classifier.exe')
-        subprocess.Popen(config['PATH']['P300Classifier'] + '\P300Classifier.exe')
+        subprocess.Popen(config['PATH']['bci2000'] + r'\tools\P300Classifier\P300Classifier.exe')
 
     # 4. COPYSPELL     ###########################
     def btn_tacCopy(self):
         print('Starte taktilen Copyspeller')
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\Operator.exe', '--OnConnect', '-LOAD PARAMETERFILE TactileCopy.prm'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\gUSBampSource.exe', '127.0.0.1'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\P3SignalProcessing.exe', '127.0.0.1'])
-        subprocess.Popen([config['PATH']['BCI2000'] + '\prog\P3Speller.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\Operator.exe', '--OnConnect', '-LOAD PARAMETERFILE TactileCopy.prm'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\gUSBampSource.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\P3SignalProcessing.exe', '127.0.0.1'])
+        subprocess.Popen([config['PATH']['bci2000'] + r'\prog\P3Speller.exe', '127.0.0.1'])
     
     # 5. WHEELCHAIR SIMULATOR     ###########################
     def btn_tacSimul(self):
 
     # X. Settings #########################
     def btn_config(self):
-        print('Einstellungen')
-        # tk_chooseDirectory
-        # tk_getOpenFile
+        print('Konfiguration')
+        messagebox.showinfo('Konfiguration', 'Bitte wählen Sie nun den BCI2000 Ordner aus, in dem sich die Ordner "batch", "data", "icons", "parms", "prog" und "tools" befinden.')
+        config['PATH']['bci2000'] = filedialog.askdirectory()
+        messagebox.showinfo('Konfiguration', 'Bitte wählen Sie nun den Ordner aus, in dem sich die TactileBCIfilter.exe befindet.')
+        config['PATH']['tactilebcifilter'] = filedialog.askdirectory()
+        config.write(open('config.ini','w'))
+        # TODO Catch errors falls falsche Ordner gewählt wurden
 
     def global_close(self, window):
         print('Beenden')

config.ini

 [PATH]
-BCI2000 = C:\BCI2000\BCI2000 v3.6.beta.R5570\BCI2000.x64
-TactileBCIFilter = C:\Users\bci\Desktop\Qt Filter Program\build-TactileBCIFilter-Desktop_Qt_5_15_0_MinGW_32_bit-Release\release
-P300Classifier = C:\Users\bci\Desktop\Igor\PythonBCIgui_v0.2\bin
+bci2000 = C:/BCI2000/BCI2000 v3.6.beta.R5570/BCI2000.x64
+tactilebcifilter = C:/Users/bci/Desktop/Qt Filter Program/build-TactileBCIFilter-Desktop_Qt_5_15_0_MinGW_32_bit-Release/release
+