ported GUI to PyQt5

7 files changed, 170 insertions, 174 deletions

diff --git a/src/kicadtoNgspice/Analysis.py b/src/kicadtoNgspice/Analysis.py
index da030153..32902a81 100644
--- a/src/kicadtoNgspice/Analysis.py
+++ b/src/kicadtoNgspice/Analysis.py
@@ -1,10 +1,10 @@
-from PyQt4 import QtGui, QtCore
+from PyQt5 import QtCore, QtWidgets
 from . import TrackWidget
 import os
 from xml.etree import ElementTree as ET
 
 
-class Analysis(QtGui.QWidget):
+class Analysis(QtWidgets.QWidget):
     """
     - This class create Analysis Tab in KicadtoNgspice Window. 4 sections -
       - Select Analysis Type
@@ -26,7 +26,7 @@ class Analysis(QtGui.QWidget):
 
     def __init__(self, clarg1):
         self.clarg1 = clarg1
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
         self.track_obj = TrackWidget.TrackWidget()
         self.count = 0
         self.parameter_cnt = 0
@@ -48,7 +48,7 @@ class Analysis(QtGui.QWidget):
         - Else set the default checkbox to `TRAN`
         - Accordingly set state for track widget options, as `TRAN`, `AC` ...
         """
-        self.grid = QtGui.QGridLayout()
+        self.grid = QtWidgets.QGridLayout()
         self.setLayout(self.grid)
 
         self.grid.addWidget(self.createCheckBox(), 0, 0, QtCore.Qt.AlignTop)
@@ -135,14 +135,14 @@ class Analysis(QtGui.QWidget):
         - checkbox > checkgrid > checkgroupbtn > checkAC | checkDC | checkTRAN
         - Trigger enableBox on clicking
         """
-        self.checkbox = QtGui.QGroupBox()
+        self.checkbox = QtWidgets.QGroupBox()
         self.checkbox.setTitle("Select Analysis Type")
-        self.checkgrid = QtGui.QGridLayout()
+        self.checkgrid = QtWidgets.QGridLayout()
 
-        self.checkgroupbtn = QtGui.QButtonGroup()
-        self.checkAC = QtGui.QCheckBox("AC")
-        self.checkDC = QtGui.QCheckBox("DC")
-        self.checkTRAN = QtGui.QCheckBox("TRANSIENT")
+        self.checkgroupbtn = QtWidgets.QButtonGroup()
+        self.checkAC = QtWidgets.QCheckBox("AC")
+        self.checkDC = QtWidgets.QCheckBox("DC")
+        self.checkTRAN = QtWidgets.QCheckBox("TRANSIENT")
 
         self.checkgroupbtn.addButton(self.checkAC)
         self.checkgroupbtn.addButton(self.checkDC)
@@ -221,15 +221,15 @@ class Analysis(QtGui.QWidget):
             check = 0
             print("AC Previous Values XML is Empty")
 
-        self.acbox = QtGui.QGroupBox()
+        self.acbox = QtWidgets.QGroupBox()
         self.acbox.setTitle("AC Analysis")
         self.acbox.setDisabled(True)
         self.acbox.setVisible(False)
-        self.acgrid = QtGui.QGridLayout()
-        self.radiobuttongroup = QtGui.QButtonGroup()
-        self.Lin = QtGui.QRadioButton("Lin")
-        self.Dec = QtGui.QRadioButton("Dec")
-        self.Oct = QtGui.QRadioButton("Oct")
+        self.acgrid = QtWidgets.QGridLayout()
+        self.radiobuttongroup = QtWidgets.QButtonGroup()
+        self.Lin = QtWidgets.QRadioButton("Lin")
+        self.Dec = QtWidgets.QRadioButton("Dec")
+        self.Oct = QtWidgets.QRadioButton("Oct")
         self.radiobuttongroup.addButton(self.Lin)
         self.radiobuttongroup.addButton(self.Dec)
         self.radiobuttongroup.addButton(self.Oct)
@@ -242,30 +242,30 @@ class Analysis(QtGui.QWidget):
         self.acgrid.addWidget(self.Oct, 1, 3)
         self.acbox.setLayout(self.acgrid)
 
-        self.scale = QtGui.QLabel("Scale")
-        self.start_fre_lable = QtGui.QLabel("Start Frequency")
-        self.stop_fre_lable = QtGui.QLabel("Stop Frequency")
-        self.no_of_points = QtGui.QLabel("No.of Points")
+        self.scale = QtWidgets.QLabel("Scale")
+        self.start_fre_lable = QtWidgets.QLabel("Start Frequency")
+        self.stop_fre_lable = QtWidgets.QLabel("Stop Frequency")
+        self.no_of_points = QtWidgets.QLabel("No.of Points")
         self.acgrid.addWidget(self.scale, 1, 0)
         self.acgrid.addWidget(self.start_fre_lable, 2, 0)
         self.acgrid.addWidget(self.stop_fre_lable, 3, 0)
         self.acgrid.addWidget(self.no_of_points, 4, 0)
 
         self.count = 0
-        self.ac_entry_var[self.count] = QtGui.QLineEdit()  # start
+        self.ac_entry_var[self.count] = QtWidgets.QLineEdit()  # start
         self.acgrid.addWidget(self.ac_entry_var[self.count], 2, 1)
         self.ac_entry_var[self.count].setMaximumWidth(150)
         self.count = self.count + 1
-        self.ac_entry_var[self.count] = QtGui.QLineEdit()  # stop
+        self.ac_entry_var[self.count] = QtWidgets.QLineEdit()  # stop
         self.acgrid.addWidget(self.ac_entry_var[self.count], 3, 1)
         self.ac_entry_var[self.count].setMaximumWidth(150)
         self.count = self.count + 1
-        self.ac_entry_var[self.count] = QtGui.QLineEdit()  # no of pts
+        self.ac_entry_var[self.count] = QtWidgets.QLineEdit()  # no of pts
         self.acgrid.addWidget(self.ac_entry_var[self.count], 4, 1)
         self.ac_entry_var[self.count].setMaximumWidth(150)
 
         self.parameter_cnt = 0
-        self.start_fre_combo = QtGui.QComboBox()
+        self.start_fre_combo = QtWidgets.QComboBox()
         self.start_fre_combo.addItem("Hz",)
         self.start_fre_combo.addItem("KHz")
         self.start_fre_combo.addItem("Meg")
@@ -285,7 +285,7 @@ class Analysis(QtGui.QWidget):
         self.start_fre_combo.activated[str].connect(self.start_combovalue)
 
         self.parameter_cnt = self.parameter_cnt + 1
-        self.stop_fre_combo = QtGui.QComboBox()
+        self.stop_fre_combo = QtWidgets.QComboBox()
         self.stop_fre_combo.addItem("Hz")
         self.stop_fre_combo.addItem("KHz")
         self.stop_fre_combo.addItem("Meg")
@@ -407,29 +407,29 @@ class Analysis(QtGui.QWidget):
             check = 0
             print("DC Previous Values XML is empty")
 
-        self.dcbox = QtGui.QGroupBox()
+        self.dcbox = QtWidgets.QGroupBox()
         self.dcbox.setTitle("DC Analysis")
         self.dcbox.setDisabled(True)
         self.dcbox.setVisible(False)
-        self.dcgrid = QtGui.QGridLayout()
+        self.dcgrid = QtWidgets.QGridLayout()
         self.dcbox.setLayout(self.dcgrid)
 
-        self.source_name = QtGui.QLabel('Enter Source 1', self)
+        self.source_name = QtWidgets.QLabel('Enter Source 1', self)
         self.source_name.setMaximumWidth(150)
-        self.start = QtGui.QLabel('Start', self)
+        self.start = QtWidgets.QLabel('Start', self)
         self.start.setMaximumWidth(150)
-        self.increment = QtGui.QLabel('Increment', self)
+        self.increment = QtWidgets.QLabel('Increment', self)
         self.increment.setMaximumWidth(150)
-        self.stop = QtGui.QLabel('Stop', self)
+        self.stop = QtWidgets.QLabel('Stop', self)
         self.stop.setMaximumWidth(150)
 
-        self.source_name2 = QtGui.QLabel('Enter Source 2', self)
+        self.source_name2 = QtWidgets.QLabel('Enter Source 2', self)
         self.source_name2.setMaximumWidth(150)
-        self.start2 = QtGui.QLabel('Start', self)
+        self.start2 = QtWidgets.QLabel('Start', self)
         self.start2.setMaximumWidth(150)
-        self.increment2 = QtGui.QLabel('Increment', self)
+        self.increment2 = QtWidgets.QLabel('Increment', self)
         self.increment2.setMaximumWidth(150)
-        self.stop2 = QtGui.QLabel('Stop', self)
+        self.stop2 = QtWidgets.QLabel('Stop', self)
         self.stop2.setMaximumWidth(150)
 
         self.dcgrid.addWidget(self.source_name, 1, 0)
@@ -444,47 +444,47 @@ class Analysis(QtGui.QWidget):
 
         self.count = 0
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # source
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # source
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 1, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # start
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # start
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 2, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # increment
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # increment
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 3, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # stop
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # stop
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 4, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # source
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # source
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 5, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # start
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # start
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 6, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # increment
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # increment
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 7, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
-        self.dc_entry_var[self.count] = QtGui.QLineEdit()  # stop
+        self.dc_entry_var[self.count] = QtWidgets.QLineEdit()  # stop
         self.dcgrid.addWidget(self.dc_entry_var[self.count], 8, 1)
         self.dc_entry_var[self.count].setMaximumWidth(150)
 
         self.parameter_cnt = 0
-        self.start_combo = QtGui.QComboBox(self)
+        self.start_combo = QtWidgets.QComboBox(self)
         self.start_combo.setMaximumWidth(150)
         self.start_combo.addItem('Volts or Amperes')
         self.start_combo.addItem('mV or mA')
@@ -501,7 +501,7 @@ class Analysis(QtGui.QWidget):
         self.start_combo.activated[str].connect(self.start_changecombo)
         self.parameter_cnt += 1
 
-        self.increment_combo = QtGui.QComboBox(self)
+        self.increment_combo = QtWidgets.QComboBox(self)
         self.increment_combo.setMaximumWidth(150)
         self.increment_combo.addItem("Volts or Amperes")
         self.increment_combo.addItem("mV or mA")
@@ -518,7 +518,7 @@ class Analysis(QtGui.QWidget):
         self.increment_combo.activated[str].connect(self.increment_changecombo)
         self.parameter_cnt += 1
 
-        self.stop_combo = QtGui.QComboBox(self)
+        self.stop_combo = QtWidgets.QComboBox(self)
         self.stop_combo.setMaximumWidth(150)
         self.stop_combo.addItem("Volts or Amperes")
         self.stop_combo.addItem("mV or mA")
@@ -535,7 +535,7 @@ class Analysis(QtGui.QWidget):
         self.stop_combo.activated[str].connect(self.stop_changecombo)
         self.parameter_cnt += 1
 
-        self.start_combo2 = QtGui.QComboBox(self)
+        self.start_combo2 = QtWidgets.QComboBox(self)
         self.start_combo2.setMaximumWidth(150)
         self.start_combo2.addItem('Volts or Amperes')
         self.start_combo2.addItem('mV or mA')
@@ -552,7 +552,7 @@ class Analysis(QtGui.QWidget):
         self.start_combo2.activated[str].connect(self.start_changecombo2)
         self.parameter_cnt += 1
 
-        self.increment_combo2 = QtGui.QComboBox(self)
+        self.increment_combo2 = QtWidgets.QComboBox(self)
         self.increment_combo2.setMaximumWidth(150)
         self.increment_combo2.addItem("Volts or Amperes")
         self.increment_combo2.addItem("mV or mA")
@@ -570,7 +570,7 @@ class Analysis(QtGui.QWidget):
             self.increment_changecombo2)
         self.parameter_cnt += 1
 
-        self.stop_combo2 = QtGui.QComboBox(self)
+        self.stop_combo2 = QtWidgets.QComboBox(self)
         self.stop_combo2.setMaximumWidth(150)
         self.stop_combo2.addItem("Volts or Amperes")
         self.stop_combo2.addItem("mV or mA")
@@ -587,18 +587,15 @@ class Analysis(QtGui.QWidget):
         self.stop_combo2.activated[str].connect(self.stop_changecombo2)
         self.parameter_cnt += 1
 
-        self.check = QtGui.QCheckBox('Operating Point Analysis', self)
+        self.check = QtWidgets.QCheckBox('Operating Point Analysis', self)
         try:
             self.track_obj.op_check.append(
                 str(root[1][4].text()))
         except BaseException:
             self.track_obj.op_check.append('0')
 
-        # QtCore.QObject.connect(check, SIGNAL("stateChanged()"), check,
-        #                        SLOT("checkedSlot"))
         self.check.stateChanged.connect(self.setflag)
-        # self.flagcheck = 1
-        # self.flagcheck= 2
+
         self.dcgrid.addWidget(self.check, 9, 1, 9, 2)
         self.track_obj.DC_entry_var["ITEMS"] = self.dc_entry_var
         self.track_obj.DC_Parameter["ITEMS"] = self.dc_parameter
@@ -707,36 +704,36 @@ class Analysis(QtGui.QWidget):
             check = 0
             print("Transient Previous Values XML is Empty")
 
-        self.trbox = QtGui.QGroupBox()
+        self.trbox = QtWidgets.QGroupBox()
         self.trbox.setTitle("Transient Analysis")
         # self.trbox.setDisabled(True)
         # self.trbox.setVisible(False)
-        self.trgrid = QtGui.QGridLayout()
+        self.trgrid = QtWidgets.QGridLayout()
         self.trbox.setLayout(self.trgrid)
 
-        self.start = QtGui.QLabel("Start Time")
-        self.step = QtGui.QLabel("Step Time")
-        self.stop = QtGui.QLabel("Stop Time")
+        self.start = QtWidgets.QLabel("Start Time")
+        self.step = QtWidgets.QLabel("Step Time")
+        self.stop = QtWidgets.QLabel("Stop Time")
         self.trgrid.addWidget(self.start, 1, 0)
         self.trgrid.addWidget(self.step, 2, 0)
         self.trgrid.addWidget(self.stop, 3, 0)
         self.count = 0
 
-        self.tran_entry_var[self.count] = QtGui.QLineEdit()
+        self.tran_entry_var[self.count] = QtWidgets.QLineEdit()
         self.trgrid.addWidget(self.tran_entry_var[self.count], 1, 1)
         self.tran_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
-        self.tran_entry_var[self.count] = QtGui.QLineEdit()
+        self.tran_entry_var[self.count] = QtWidgets.QLineEdit()
         self.trgrid.addWidget(self.tran_entry_var[self.count], 2, 1)
         self.tran_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
-        self.tran_entry_var[self.count] = QtGui.QLineEdit()
+        self.tran_entry_var[self.count] = QtWidgets.QLineEdit()
         self.trgrid.addWidget(self.tran_entry_var[self.count], 3, 1)
         self.tran_entry_var[self.count].setMaximumWidth(150)
         self.count += 1
 
         self.parameter_cnt = 0
-        self.start_combobox = QtGui.QComboBox()
+        self.start_combobox = QtWidgets.QComboBox()
         self.start_combobox.addItem("Sec")
         self.start_combobox.addItem("ms")
         self.start_combobox.addItem("us")
@@ -752,7 +749,7 @@ class Analysis(QtGui.QWidget):
         self.start_combobox.activated[str].connect(self.start_combo_change)
         self.parameter_cnt += 1
 
-        self.step_combobox = QtGui.QComboBox()
+        self.step_combobox = QtWidgets.QComboBox()
         self.step_combobox.addItem("Sec")
         self.step_combobox.addItem("ms")
         self.step_combobox.addItem("us")
@@ -767,7 +764,7 @@ class Analysis(QtGui.QWidget):
         self.step_combobox.activated[str].connect(self.step_combo_change)
         self.parameter_cnt += 1
 
-        self.stop_combobox = QtGui.QComboBox()
+        self.stop_combobox = QtWidgets.QComboBox()
         self.stop_combobox.addItem("Sec")
         self.stop_combobox.addItem("ms")
         self.stop_combobox.addItem("us")
diff --git a/src/kicadtoNgspice/Convert.py b/src/kicadtoNgspice/Convert.py
index 7ab57427..24449a3b 100644
--- a/src/kicadtoNgspice/Convert.py
+++ b/src/kicadtoNgspice/Convert.py
@@ -1,4 +1,4 @@
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 import os
 import shutil
 from . import TrackWidget
@@ -584,7 +584,7 @@ class Convert:
 
         if len(self.obj_track.subcircuitList) != len(
                 self.obj_track.subcircuitTrack):
-            self.msg = QtGui.QErrorMessage()
+            self.msg = QtWidgets.QErrorMessage()
             self.msg.setModal(True)
             self.msg.setWindowTitle("Error Message")
             self.msg.showMessage(
diff --git a/src/kicadtoNgspice/DeviceModel.py b/src/kicadtoNgspice/DeviceModel.py
index ceb89351..1c77cabc 100644
--- a/src/kicadtoNgspice/DeviceModel.py
+++ b/src/kicadtoNgspice/DeviceModel.py
@@ -1,10 +1,10 @@
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 import os
 from xml.etree import ElementTree as ET
 from . import TrackWidget
 
 
-class DeviceModel(QtGui.QWidget):
+class DeviceModel(QtWidgets.QWidget):
     """
     - This class creates Device Library Tab in KicadtoNgspice Window
       It dynamically creates the widget for device like diode,mosfet,
@@ -42,7 +42,7 @@ class DeviceModel(QtGui.QWidget):
         except BaseException:
             print("Device Model Previous XML is Empty")
 
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
 
         # Creating track widget object
         self.obj_trac = TrackWidget.TrackWidget()
@@ -62,7 +62,7 @@ class DeviceModel(QtGui.QWidget):
         self.deviceDetail = {}
 
         # Set Layout
-        self.grid = QtGui.QGridLayout()
+        self.grid = QtWidgets.QGridLayout()
         self.setLayout(self.grid)
         # print("Reading Device model details from Schematic")
 
@@ -73,14 +73,14 @@ class DeviceModel(QtGui.QWidget):
             if eachline[0] == 'q':
                 # print("Device Model Transistor: ", words[0])
                 self.devicemodel_dict_beg[words[0]] = self.count
-                transbox = QtGui.QGroupBox()
-                transgrid = QtGui.QGridLayout()
+                transbox = QtWidgets.QGroupBox()
+                transgrid = QtWidgets.QGridLayout()
                 transbox.setTitle(
                     "Add library for Transistor " +
                     words[0] +
                     " : " +
                     words[4])
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 global path_name
 
@@ -104,7 +104,7 @@ class DeviceModel(QtGui.QWidget):
                     pass
 
                 transgrid.addWidget(self.entry_var[self.count], self.row, 1)
-                self.addbtn = QtGui.QPushButton("Add")
+                self.addbtn = QtWidgets.QPushButton("Add")
                 self.addbtn.setObjectName("%d" % self.count)
                 self.addbtn.clicked.connect(self.trackLibrary)
                 self.deviceDetail[self.count] = words[0]
@@ -137,14 +137,14 @@ class DeviceModel(QtGui.QWidget):
             elif eachline[0] == 'd':
                 # print("Device Model Diode:", words[0])
                 self.devicemodel_dict_beg[words[0]] = self.count
-                diodebox = QtGui.QGroupBox()
-                diodegrid = QtGui.QGridLayout()
+                diodebox = QtWidgets.QGroupBox()
+                diodegrid = QtWidgets.QGridLayout()
                 diodebox.setTitle(
                     "Add library for Diode " +
                     words[0] +
                     " : " +
                     words[3])
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 # global path_name
                 try:
@@ -167,7 +167,7 @@ class DeviceModel(QtGui.QWidget):
                     pass
 
                 diodegrid.addWidget(self.entry_var[self.count], self.row, 1)
-                self.addbtn = QtGui.QPushButton("Add")
+                self.addbtn = QtWidgets.QPushButton("Add")
                 self.addbtn.setObjectName("%d" % self.count)
                 self.addbtn.clicked.connect(self.trackLibrary)
                 self.deviceDetail[self.count] = words[0]
@@ -200,14 +200,14 @@ class DeviceModel(QtGui.QWidget):
             elif eachline[0] == 'j':
                 # print("Device Model JFET:", words[0])
                 self.devicemodel_dict_beg[words[0]] = self.count
-                jfetbox = QtGui.QGroupBox()
-                jfetgrid = QtGui.QGridLayout()
+                jfetbox = QtWidgets.QGroupBox()
+                jfetgrid = QtWidgets.QGridLayout()
                 jfetbox.setTitle(
                     "Add library for JFET " +
                     words[0] +
                     " : " +
                     words[4])
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 # global path_name
                 try:
@@ -230,7 +230,7 @@ class DeviceModel(QtGui.QWidget):
                     pass
 
                 jfetgrid.addWidget(self.entry_var[self.count], self.row, 1)
-                self.addbtn = QtGui.QPushButton("Add")
+                self.addbtn = QtWidgets.QPushButton("Add")
                 self.addbtn.setObjectName("%d" % self.count)
                 self.addbtn.clicked.connect(self.trackLibrary)
                 self.deviceDetail[self.count] = words[0]
@@ -262,8 +262,8 @@ class DeviceModel(QtGui.QWidget):
 
             elif eachline[0] == 'm':
                 self.devicemodel_dict_beg[words[0]] = self.count
-                mosfetbox = QtGui.QGroupBox()
-                mosfetgrid = QtGui.QGridLayout()
+                mosfetbox = QtWidgets.QGroupBox()
+                mosfetgrid = QtWidgets.QGridLayout()
                 i = self.count
                 beg = self.count
                 mosfetbox.setTitle(
@@ -271,10 +271,10 @@ class DeviceModel(QtGui.QWidget):
                     words[0] +
                     " : " +
                     words[5])
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 mosfetgrid.addWidget(self.entry_var[self.count], self.row, 1)
-                self.addbtn = QtGui.QPushButton("Add")
+                self.addbtn = QtWidgets.QPushButton("Add")
                 self.addbtn.setObjectName("%d" % self.count)
                 self.addbtn.clicked.connect(self.trackLibrary)
                 mosfetgrid.addWidget(self.addbtn, self.row, 2)
@@ -287,32 +287,32 @@ class DeviceModel(QtGui.QWidget):
                 self.count = self.count + 1
 
                 # Adding to get MOSFET dimension
-                self.widthLabel[self.count] = QtGui.QLabel(
+                self.widthLabel[self.count] = QtWidgets.QLabel(
                     "Enter width of MOSFET " + words[0] + "(default=100u):")
                 mosfetgrid.addWidget(self.widthLabel[self.count], self.row, 0)
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 self.entry_var[self.count].setMaximumWidth(150)
                 mosfetgrid.addWidget(self.entry_var[self.count], self.row, 1)
                 self.row = self.row + 1
                 self.count = self.count + 1
 
-                self.lengthLabel[self.count] = QtGui.QLabel(
+                self.lengthLabel[self.count] = QtWidgets.QLabel(
                     "Enter length of MOSFET " + words[0] + "(default=100u):")
                 mosfetgrid.addWidget(self.lengthLabel[self.count], self.row, 0)
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 self.entry_var[self.count].setMaximumWidth(150)
                 mosfetgrid.addWidget(self.entry_var[self.count], self.row, 1)
                 self.row = self.row + 1
                 self.count = self.count + 1
 
-                self.multifactorLable[self.count] = QtGui.QLabel(
+                self.multifactorLable[self.count] = QtWidgets.QLabel(
                     "Enter multiplicative factor of MOSFET " +
                     words[0] + "(default=1):")
                 mosfetgrid.addWidget(
                     self.multifactorLable[self.count], self.row, 0)
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
                 end = self.count
                 self.entry_var[self.count].setMaximumWidth(150)
@@ -368,12 +368,10 @@ class DeviceModel(QtGui.QWidget):
         if os.name == 'nt':
             init_path = ''
 
-        self.libfile = str(
-            QtGui.QFileDialog.getOpenFileName(
+        self.libfile = QtWidgets.QFileDialog.getOpenFileName(
                 self, "Open Library Directory",
                 init_path + "library/deviceModelLibrary", "*.lib"
-            )
-        )
+            )[0]
 
         # Setting Library to Text Edit Line
         self.entry_var[self.widgetObjCount].setText(self.libfile)
diff --git a/src/kicadtoNgspice/KicadtoNgspice.py b/src/kicadtoNgspice/KicadtoNgspice.py
index 4ce7d49b..93cf6a4e 100644
--- a/src/kicadtoNgspice/KicadtoNgspice.py
+++ b/src/kicadtoNgspice/KicadtoNgspice.py
@@ -11,14 +11,14 @@
 #         NOTES: ---
 #        AUTHOR: Fahim Khan, fahim.elex@gmail.com
 #      MODIFIED: Rahul Paknikar, rahulp@iitb.ac.in
-#  ORGANIZATION: eSim Team at FOSSEE, IIT Bombay.
+#  ORGANIZATION: eSim Team at FOSSEE, IIT Bombay
 #       CREATED: Wednesday 04 March 2015
-#      REVISION: Friday 24 July 2020
+#      REVISION: Saturday 25 July 2020
 # =========================================================================
 
 import sys
 import os
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 from .Processing import PrcocessNetlist
 from . import Analysis
 from . import Source
@@ -30,7 +30,7 @@ from . import TrackWidget
 from xml.etree import ElementTree as ET
 
 
-class MainWindow(QtGui.QWidget):
+class MainWindow(QtWidgets.QWidget):
     """
     - This class create KicadtoNgspice window.
     - And Call Convert function if convert button is pressed.
@@ -42,7 +42,7 @@ class MainWindow(QtGui.QWidget):
     """
 
     def __init__(self, clarg1, clarg2=None):
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
         print("==================================")
         print("Kicad to Ngspice netlist converter")
         print("==================================")
@@ -120,7 +120,7 @@ class MainWindow(QtGui.QWidget):
         """
         if unknownModelList:
             print("Unknown Model List is : ", unknownModelList)
-            self.msg = QtGui.QErrorMessage()
+            self.msg = QtWidgets.QErrorMessage()
             self.msg.setModal(True)
             self.msg.setWindowTitle("Unknown Models")
             self.content = "Your schematic contain unknown model " + \
@@ -129,7 +129,7 @@ class MainWindow(QtGui.QWidget):
             self.msg.exec_()
 
         elif multipleModelList:
-            self.msg = QtGui.QErrorMessage()
+            self.msg = QtWidgets.QErrorMessage()
             self.msg.setModal(True)
             self.msg.setWindowTitle("Multiple Models")
             self.mcontent = "Look like you have duplicate model in \
@@ -148,10 +148,10 @@ class MainWindow(QtGui.QWidget):
             - createcreateConvertWidget
             - Convert button => callConvert
         """
-        self.vbox = QtGui.QVBoxLayout()
-        self.hbox = QtGui.QHBoxLayout()
+        self.vbox = QtWidgets.QVBoxLayout()
+        self.hbox = QtWidgets.QHBoxLayout()
         self.hbox.addStretch(1)
-        self.convertbtn = QtGui.QPushButton("Convert")
+        self.convertbtn = QtWidgets.QPushButton("Convert")
         self.convertbtn.clicked.connect(self.callConvert)
         self.hbox.addWidget(self.convertbtn)
         self.vbox.addWidget(self.createcreateConvertWidget())
@@ -183,44 +183,45 @@ class MainWindow(QtGui.QWidget):
         - convertWindow > mainLayout > tabWidgets > AnalysisTab, SourceTab ...
         """
         global obj_analysis
-        self.convertWindow = QtGui.QWidget()
-        self.analysisTab = QtGui.QScrollArea()
+        self.convertWindow = QtWidgets.QWidget()
+        self.analysisTab = QtWidgets.QScrollArea()
         obj_analysis = Analysis.Analysis(self.clarg1)
         self.analysisTab.setWidget(obj_analysis)
-        # self.analysisTabLayout = QtGui.QVBoxLayout(self.analysisTab.widget())
+        # self.analysisTabLayout = \
+        #       QtWidgets.QVBoxLayout(self.analysisTab.widget())
         self.analysisTab.setWidgetResizable(True)
         global obj_source
-        self.sourceTab = QtGui.QScrollArea()
+        self.sourceTab = QtWidgets.QScrollArea()
         obj_source = Source.Source(sourcelist, sourcelisttrack, self.clarg1)
         self.sourceTab.setWidget(obj_source)
-        # self.sourceTabLayout = QtGui.QVBoxLayout(self.sourceTab.widget())
+        # self.sourceTabLayout = QtWidgets.QVBoxLayout(self.sourceTab.widget())
         self.sourceTab.setWidgetResizable(True)
         global obj_model
-        self.modelTab = QtGui.QScrollArea()
+        self.modelTab = QtWidgets.QScrollArea()
         obj_model = Model.Model(schematicInfo, modelList, self.clarg1)
         self.modelTab.setWidget(obj_model)
-        # self.modelTabLayout = QtGui.QVBoxLayout(self.modelTab.widget())
+        # self.modelTabLayout = QtWidgets.QVBoxLayout(self.modelTab.widget())
         self.modelTab.setWidgetResizable(True)
         global obj_devicemodel
-        self.deviceModelTab = QtGui.QScrollArea()
+        self.deviceModelTab = QtWidgets.QScrollArea()
         obj_devicemodel = DeviceModel.DeviceModel(schematicInfo, self.clarg1)
         self.deviceModelTab.setWidget(obj_devicemodel)
         self.deviceModelTab.setWidgetResizable(True)
         global obj_subcircuitTab
-        self.subcircuitTab = QtGui.QScrollArea()
+        self.subcircuitTab = QtWidgets.QScrollArea()
         obj_subcircuitTab = SubcircuitTab.SubcircuitTab(
             schematicInfo, self.clarg1)
         self.subcircuitTab.setWidget(obj_subcircuitTab)
         self.subcircuitTab.setWidgetResizable(True)
 
-        self.tabWidget = QtGui.QTabWidget()
-        # self.tabWidget.TabShape(QtGui.QTabWidget.Rounded)
+        self.tabWidget = QtWidgets.QTabWidget()
+        # self.tabWidget.TabShape(QtWidgets.QTabWidget.Rounded)
         self.tabWidget.addTab(self.analysisTab, "Analysis")
         self.tabWidget.addTab(self.sourceTab, "Source Details")
         self.tabWidget.addTab(self.modelTab, "Ngspice Model")
         self.tabWidget.addTab(self.deviceModelTab, "Device Modeling")
         self.tabWidget.addTab(self.subcircuitTab, "Subcircuits")
-        self.mainLayout = QtGui.QVBoxLayout()
+        self.mainLayout = QtWidgets.QVBoxLayout()
         self.mainLayout.addWidget(self.tabWidget)
         # self.mainLayout.addStretch(1)
         self.convertWindow.setLayout(self.mainLayout)
@@ -664,8 +665,8 @@ class MainWindow(QtGui.QWidget):
 
             self.msg = "The Kicad to Ngspice Conversion completed "
             self.msg += "successfully!"
-            QtGui.QMessageBox.information(
-                self, "Information", self.msg, QtGui.QMessageBox.Ok
+            QtWidgets.QMessageBox.information(
+                self, "Information", self.msg, QtWidgets.QMessageBox.Ok
             )
         except Exception as e:
             print("Exception Message: ", e)
diff --git a/src/kicadtoNgspice/Model.py b/src/kicadtoNgspice/Model.py
index a5757702..0c821190 100644
--- a/src/kicadtoNgspice/Model.py
+++ b/src/kicadtoNgspice/Model.py
@@ -1,10 +1,10 @@
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 from . import TrackWidget
 from xml.etree import ElementTree as ET
 import os
 
 
-class Model(QtGui.QWidget):
+class Model(QtWidgets.QWidget):
     """
     - This class creates Model Tab of KicadtoNgspice window.
       The widgets are created dynamically in the Model Tab.
@@ -12,7 +12,7 @@ class Model(QtGui.QWidget):
 
     def __init__(self, schematicInfo, modelList, clarg1):
 
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
 
         # Processing for getting previous values
         kicadFile = clarg1
@@ -48,7 +48,7 @@ class Model(QtGui.QWidget):
         self.end = 0
 
         # Creating GUI dynamically for Model tab
-        self.grid = QtGui.QGridLayout()
+        self.grid = QtWidgets.QGridLayout()
         self.setLayout(self.grid)
 
         for line in modelList:
@@ -56,8 +56,8 @@ class Model(QtGui.QWidget):
             # Adding title label for model
             # Key: Tag name,Value:Entry widget number
             tag_dict = {}
-            modelbox = QtGui.QGroupBox()
-            modelgrid = QtGui.QGridLayout()
+            modelbox = QtWidgets.QGroupBox()
+            modelgrid = QtWidgets.QGridLayout()
             modelbox.setTitle(line[5])
             self.start = self.nextcount
             # line[7] is parameter dictionary holding parameter tags.
@@ -68,10 +68,10 @@ class Model(QtGui.QWidget):
                     # For tag having vector value
                     temp_tag = []
                     for item in value:
-                        paramLabel = QtGui.QLabel(item)
+                        paramLabel = QtWidgets.QLabel(item)
                         modelgrid.addWidget(paramLabel, self.nextrow, 0)
                         self.obj_trac.model_entry_var[self.nextcount] = (
-                            QtGui.QLineEdit()
+                            QtWidgets.QLineEdit()
                         )
                         modelgrid.addWidget(
                             self.obj_trac.model_entry_var
@@ -93,10 +93,10 @@ class Model(QtGui.QWidget):
                     tag_dict[key] = temp_tag
 
                 else:
-                    paramLabel = QtGui.QLabel(value)
+                    paramLabel = QtWidgets.QLabel(value)
                     modelgrid.addWidget(paramLabel, self.nextrow, 0)
                     self.obj_trac.model_entry_var[self.nextcount] = (
-                        QtGui.QLineEdit()
+                        QtWidgets.QLineEdit()
                     )
                     modelgrid.addWidget(
                         self.obj_trac.model_entry_var[self.nextcount],
diff --git a/src/kicadtoNgspice/Source.py b/src/kicadtoNgspice/Source.py
index e42899e3..3febdfeb 100644
--- a/src/kicadtoNgspice/Source.py
+++ b/src/kicadtoNgspice/Source.py
@@ -1,16 +1,16 @@
 import os
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 from . import TrackWidget
 from xml.etree import ElementTree as ET
 
 
-class Source(QtGui.QWidget):
+class Source(QtWidgets.QWidget):
     """
     This class create Source Tab of KicadtoNgSpice Window.
     """
 
     def __init__(self, sourcelist, sourcelisttrack, clarg1):
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
         self.obj_track = TrackWidget.TrackWidget()
         # Variables
         self.count = 1
@@ -67,7 +67,7 @@ class Source(QtGui.QWidget):
         except BaseException:
             print("Source Previous Values XML is Empty")
 
-        self.grid = QtGui.QGridLayout()
+        self.grid = QtWidgets.QGridLayout()
         self.setLayout(self.grid)
         xml_num = 0
 
@@ -76,19 +76,19 @@ class Source(QtGui.QWidget):
                 print("SourceList line: ", line)
                 track_id = line[0]
                 if line[2] == 'ac':
-                    acbox = QtGui.QGroupBox()
+                    acbox = QtWidgets.QGroupBox()
                     acbox.setTitle(line[3])
-                    acgrid = QtGui.QGridLayout()
+                    acgrid = QtWidgets.QGridLayout()
                     self.start = self.count
-                    label1 = QtGui.QLabel(line[4])
-                    label2 = QtGui.QLabel(line[5])
+                    label1 = QtWidgets.QLabel(line[4])
+                    label2 = QtWidgets.QLabel(line[5])
                     acgrid.addWidget(label1, self.row, 0)
                     acgrid.addWidget(label2, self.row + 1, 0)
 
-                    self.entry_var[self.count] = QtGui.QLineEdit()
+                    self.entry_var[self.count] = QtWidgets.QLineEdit()
                     self.entry_var[self.count].setMaximumWidth(150)
                     acgrid.addWidget(self.entry_var[self.count], self.row, 1)
-                    self.entry_var[self.count + 1] = QtGui.QLineEdit()
+                    self.entry_var[self.count + 1] = QtWidgets.QLineEdit()
                     self.entry_var[self.count + 1].setMaximumWidth(150)
                     acgrid.addWidget(
                         self.entry_var[self.count+1], self.row + 1, 1)
@@ -127,15 +127,15 @@ class Source(QtGui.QWidget):
                         [track_id, 'ac', self.start, self.end])
 
                 elif line[2] == 'dc':
-                    dcbox = QtGui.QGroupBox()
+                    dcbox = QtWidgets.QGroupBox()
                     dcbox.setTitle(line[3])
-                    dcgrid = QtGui.QGridLayout()
+                    dcgrid = QtWidgets.QGridLayout()
                     self.row = self.row + 1
                     self.start = self.count
-                    label = QtGui.QLabel(line[4])
+                    label = QtWidgets.QLabel(line[4])
                     dcgrid.addWidget(label, self.row, 0)
 
-                    self.entry_var[self.count] = QtGui.QLineEdit()
+                    self.entry_var[self.count] = QtWidgets.QLineEdit()
                     self.entry_var[self.count].setMaximumWidth(150)
                     dcgrid.addWidget(self.entry_var[self.count], self.row, 1)
                     self.entry_var[self.count].setText("")
@@ -170,16 +170,16 @@ class Source(QtGui.QWidget):
                         [track_id, 'dc', self.start, self.end])
 
                 elif line[2] == 'sine':
-                    sinebox = QtGui.QGroupBox()
+                    sinebox = QtWidgets.QGroupBox()
                     sinebox.setTitle(line[3])
-                    sinegrid = QtGui.QGridLayout()
+                    sinegrid = QtWidgets.QGridLayout()
                     self.row = self.row + 1
                     self.start = self.count
 
                     for it in range(4, 9):
-                        label = QtGui.QLabel(line[it])
+                        label = QtWidgets.QLabel(line[it])
                         sinegrid.addWidget(label, self.row, 0)
-                        self.entry_var[self.count] = QtGui.QLineEdit()
+                        self.entry_var[self.count] = QtWidgets.QLineEdit()
                         self.entry_var[self.count].setMaximumWidth(150)
                         sinegrid.addWidget(
                             self.entry_var[self.count], self.row, 1)
@@ -214,15 +214,15 @@ class Source(QtGui.QWidget):
                         [track_id, 'sine', self.start, self.end])
 
                 elif line[2] == 'pulse':
-                    pulsebox = QtGui.QGroupBox()
+                    pulsebox = QtWidgets.QGroupBox()
                     pulsebox.setTitle(line[3])
-                    pulsegrid = QtGui.QGridLayout()
+                    pulsegrid = QtWidgets.QGridLayout()
                     self.start = self.count
 
                     for it in range(4, 11):
-                        label = QtGui.QLabel(line[it])
+                        label = QtWidgets.QLabel(line[it])
                         pulsegrid.addWidget(label, self.row, 0)
-                        self.entry_var[self.count] = QtGui.QLineEdit()
+                        self.entry_var[self.count] = QtWidgets.QLineEdit()
                         self.entry_var[self.count].setMaximumWidth(150)
                         pulsegrid.addWidget(
                             self.entry_var[self.count], self.row, 1)
@@ -257,13 +257,13 @@ class Source(QtGui.QWidget):
                         [track_id, 'pulse', self.start, self.end])
 
                 elif line[2] == 'pwl':
-                    pwlbox = QtGui.QGroupBox()
+                    pwlbox = QtWidgets.QGroupBox()
                     pwlbox.setTitle(line[3])
                     self.start = self.count
-                    pwlgrid = QtGui.QGridLayout()
-                    label = QtGui.QLabel(line[4])
+                    pwlgrid = QtWidgets.QGridLayout()
+                    label = QtWidgets.QLabel(line[4])
                     pwlgrid.addWidget(label, self.row, 0)
-                    self.entry_var[self.count] = QtGui.QLineEdit()
+                    self.entry_var[self.count] = QtWidgets.QLineEdit()
                     self.entry_var[self.count].setMaximumWidth(150)
                     pwlgrid.addWidget(self.entry_var[self.count], self.row, 1)
                     self.entry_var[self.count].setText("")
@@ -297,15 +297,15 @@ class Source(QtGui.QWidget):
                         [track_id, 'pwl', self.start, self.end])
 
                 elif line[2] == 'exp':
-                    expbox = QtGui.QGroupBox()
+                    expbox = QtWidgets.QGroupBox()
                     expbox.setTitle(line[3])
-                    expgrid = QtGui.QGridLayout()
+                    expgrid = QtWidgets.QGridLayout()
                     self.start = self.count
 
                     for it in range(4, 10):
-                        label = QtGui.QLabel(line[it])
+                        label = QtWidgets.QLabel(line[it])
                         expgrid.addWidget(label, self.row, 0)
-                        self.entry_var[self.count] = QtGui.QLineEdit()
+                        self.entry_var[self.count] = QtWidgets.QLineEdit()
                         self.entry_var[self.count].setMaximumWidth(150)
                         expgrid.addWidget(
                             self.entry_var[self.count], self.row, 1)
diff --git a/src/kicadtoNgspice/SubcircuitTab.py b/src/kicadtoNgspice/SubcircuitTab.py
index f4b759c5..4c7179d3 100644
--- a/src/kicadtoNgspice/SubcircuitTab.py
+++ b/src/kicadtoNgspice/SubcircuitTab.py
@@ -1,11 +1,11 @@
-from PyQt4 import QtGui
+from PyQt5 import QtWidgets
 from . import TrackWidget
 from projManagement import Validation
 import os
 from xml.etree import ElementTree as ET
 
 
-class SubcircuitTab(QtGui.QWidget):
+class SubcircuitTab(QtWidgets.QWidget):
     """
     - This class creates Subcircuit Tab in KicadtoNgspice Window
     - It dynamically creates the widget for subcircuits,
@@ -37,7 +37,7 @@ class SubcircuitTab(QtGui.QWidget):
         except BaseException:
             print("Subcircuit Previous values XML is Empty")
 
-        QtGui.QWidget.__init__(self)
+        QtWidgets.QWidget.__init__(self)
 
         # Creating track widget object
         self.obj_trac = TrackWidget.TrackWidget()
@@ -57,7 +57,7 @@ class SubcircuitTab(QtGui.QWidget):
         self.numPorts = []
 
         # Set Layout
-        self.grid = QtGui.QGridLayout()
+        self.grid = QtWidgets.QGridLayout()
         self.setLayout(self.grid)
 
         for eachline in schematicInfo:
@@ -66,10 +66,10 @@ class SubcircuitTab(QtGui.QWidget):
                 # print("Subcircuit : Words", words[0])
                 self.obj_trac.subcircuitList[project_name + words[0]] = words
                 self.subcircuit_dict_beg[words[0]] = self.count
-                subbox = QtGui.QGroupBox()
-                subgrid = QtGui.QGridLayout()
+                subbox = QtWidgets.QGroupBox()
+                subgrid = QtWidgets.QGridLayout()
                 subbox.setTitle("Add subcircuit for " + words[len(words) - 1])
-                self.entry_var[self.count] = QtGui.QLineEdit()
+                self.entry_var[self.count] = QtWidgets.QLineEdit()
                 self.entry_var[self.count].setText("")
 
                 global path_name
@@ -94,7 +94,7 @@ class SubcircuitTab(QtGui.QWidget):
                     print("Error before subcircuit :", str(e))
 
                 subgrid.addWidget(self.entry_var[self.count], self.row, 1)
-                self.addbtn = QtGui.QPushButton("Add")
+                self.addbtn = QtWidgets.QPushButton("Add")
                 self.addbtn.setObjectName("%d" % self.count)
                 # Send the number of ports specified with the given\
                 # subcircuit for verification.
@@ -151,7 +151,7 @@ class SubcircuitTab(QtGui.QWidget):
             init_path = ''
 
         self.subfile = str(
-            QtGui.QFileDialog.getExistingDirectory(
+            QtWidgets.QFileDialog.getExistingDirectory(
                 self, "Open Subcircuit",
                 init_path + "library/SubcircuitLibrary")
             )
@@ -166,14 +166,14 @@ class SubcircuitTab(QtGui.QWidget):
 
             self.obj_trac.subcircuitTrack[self.subName] = self.subfile
         elif self.reply == "PORT":
-            self.msg = QtGui.QErrorMessage(self)
+            self.msg = QtWidgets.QErrorMessage(self)
             self.msg.setModal(True)
             self.msg.setWindowTitle("Error Message")
             self.msg.showMessage(
                 "Please select a Subcircuit with correct number of ports.")
             self.msg.exec_()
         elif self.reply == "DIREC":
-            self.msg = QtGui.QErrorMessage(self)
+            self.msg = QtWidgets.QErrorMessage(self)
             self.msg.setModal(True)
             self.msg.setWindowTitle("Error Message")
             self.msg.showMessage(
@@ -201,14 +201,14 @@ class SubcircuitTab(QtGui.QWidget):
             # Storing to track it during conversion
             self.obj_trac.subcircuitTrack[self.subName] = self.subfile
         elif self.reply == "PORT":
-            self.msg = QtGui.QErrorMessage(self)
+            self.msg = QtWidgets.QErrorMessage(self)
             self.msg.setModal(True)
             self.msg.setWindowTitle("Error Message")
             self.msg.showMessage(
                 "Please select a Subcircuit with correct number of ports.")
             self.msg.exec_()
         elif self.reply == "DIREC":
-            self.msg = QtGui.QErrorMessage(self)
+            self.msg = QtWidgets.QErrorMessage(self)
             self.msg.setModal(True)
             self.msg.setWindowTitle("Error Message")
             self.msg.showMessage(