Put measurements into separate output directory

Python_script/climate-lab-gui.py

 #!/usr/bin/python3
+import os.path
+
 from PyQt5.QtWidgets import QMainWindow, QApplication, QPushButton, QTextEdit
 from PyQt5 import uic, QtCore, QtGui, QtWidgets
 import sys
@@ -17,6 +19,8 @@ class TestStandMainWindow(QMainWindow):
         self.tempSweepButton.clicked.connect(lambda: self.set_temp_sweep_labels())
         self.humSweepButton.clicked.connect(lambda: self.set_hum_sweep_labels())
 
+        self.start_dir = os.getcwd()
+
     def set_temp_sweep_labels(self):
         self.parametersGroupBox.setEnabled(True)
         self.startStopStepGroupBox.setTitle('Temperature [degC]')
@@ -27,10 +31,33 @@ class TestStandMainWindow(QMainWindow):
         self.startStopStepGroupBox.setTitle('Humidity [% r.h.]')
         self.fixedParameterLabel.setText('Temperature [degC]')
 
+    def check_and_change_dir(self, data_folder):
+        if os.path.exists(data_folder):
+            if os.path.isdir(data_folder):
+                button_reply = QtWidgets.QMessageBox.question(self, 'Warning: \''+data_folder+'\' already exists',
+                                                              'Overwrite data in \''+data_folder+'\'?',
+                                                              QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
+                                                              QtWidgets.QMessageBox.No)
+                if not button_reply == QtWidgets.QMessageBox.Yes:
+                    return False
+            else:
+                QtWidgets.QMessageBox.critical(self, 'Error', '\''+data_folder + '\' exists but is not a directory!')
+                return False
+        else:
+            try:
+                os.makedirs(data_folder)
+            except:
+                QtWidgets.QMessageBox.critical(self, 'Error', 'Cannot create folder \''+data_folder + '\'!')
+                return False
+        os.chdir(data_folder)
+        print('changed dir')
+        return True
+
     def do_measurement(self):
         self.setEnabled(False)
         self.qt_app.processEvents();
 
+        os.chdir(self.start_dir)
         with open('test_stand_parameter.json', 'r') as f:
             config_data = json.load(f)
 
@@ -38,6 +65,11 @@ class TestStandMainWindow(QMainWindow):
             output_basename = time.strftime("%Y_%m_%d-%H_%M_%S") + "_results"
         else:
             output_basename = self.baseName.text()
+
+        if not self.check_and_change_dir(config_data['data_folder']+'/'+output_basename):
+            self.setEnabled(True)
+            return
+
         meas = prototype.Measurements(config_data['chamber_ip'], config_data['vna_ip'], output_basename,
                                       False, config_data)
         try:

Python_script/test_stand_parameter.json

-{"delta_temp": 0.1, "delta_hum": 1, "delta_mag": 0.1 , "delta_phase": 0.02, "sleep_time": 10.0, "frequency": 1300000000, "vna_config_file": "climate-lab.znxml","chamber_ip":"localhost", "vna_ip":"localhost"}
+{"delta_temp": 0.1, "delta_hum": 1, "delta_mag": 0.1 , "delta_phase": 0.02, "sleep_time": 10.0, "frequency": 1300000000, "vna_config_file": "climate-lab.znxml","chamber_ip":"localhost", "vna_ip":"localhost", "data_folder":"measurements"}