import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class ComboBox(QWidget):
    def __init__(self, parent=None, items=[]):
        super(ComboBox, self).__init__(parent)

        layout = QHBoxLayout()
        self.cb = QComboBox()
        self.items = items
        self.cb.addItems(self.items)
        
        self.cb.currentIndexChanged.connect(parent.comboSelectionChanged)
            
        layout.addWidget(self.cb)
        self.setLayout(layout)
        
    def update_items(self, items):
        self.items = items

        self.cb.clear()
        self.cb.addItems(self.items)
try:
    from PyQt5.QtWidgets import QWidget, QHBoxLayout, QComboBox
except ImportError:
    # needed for py3+qt4
    # Ref:
    # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
    # http://stackoverflow.com/questions/21217399/pyqt4-qtcore-qvariant-object-instead-of-a-string
    if sys.version_info.major >= 3:
        import sip
        sip.setapi('QVariant', 2)
    from PyQt4.QtWidgets import QWidget, QHBoxLayout, QComboBox


class ComboBox(QWidget):
    def __init__(self, parent=None, items=[]):
        super(ComboBox, self).__init__(parent)

        layout = QHBoxLayout()
        self.cb = QComboBox()
        self.items = items
        self.cb.addItems(self.items)

        self.cb.currentIndexChanged.connect(parent.comboSelectionChanged)

        layout.addWidget(self.cb)
        self.setLayout(layout)

    def update_items(self, items):
        self.items = items

        self.cb.clear()
        self.cb.addItems(self.items)

Update imports and added PyQt4 support
Update imports and added PyQt4 support

- import sys
- from PyQt5.QtCore import *
- from PyQt5.QtGui import *
- from PyQt5.QtWidgets import *
+ try:
+     from PyQt5.QtWidgets import QWidget, QHBoxLayout, QComboBox
+ except ImportError:
+     # needed for py3+qt4
+     # Ref:
+     # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
+     # http://stackoverflow.com/questions/21217399/pyqt4-qtcore-qvariant-object-instead-of-a-string
+     if sys.version_info.major >= 3:
+         import sip
+         sip.setapi('QVariant', 2)
+     from PyQt4.QtWidgets import QWidget, QHBoxLayout, QComboBox
  
  
  class ComboBox(QWidget):
      def __init__(self, parent=None, items=[]):
          super(ComboBox, self).__init__(parent)
  
          layout = QHBoxLayout()
          self.cb = QComboBox()
          self.items = items
          self.cb.addItems(self.items)
-         
+ 
          self.cb.currentIndexChanged.connect(parent.comboSelectionChanged)
-             
+ 
          layout.addWidget(self.cb)
          self.setLayout(layout)
-         
+ 
      def update_items(self, items):
          self.items = items
  
          self.cb.clear()
          self.cb.addItems(self.items)
+ 
Update imports and added PyQt4 support
## Code Before:
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *


class ComboBox(QWidget):
    def __init__(self, parent=None, items=[]):
        super(ComboBox, self).__init__(parent)

        layout = QHBoxLayout()
        self.cb = QComboBox()
        self.items = items
        self.cb.addItems(self.items)
        
        self.cb.currentIndexChanged.connect(parent.comboSelectionChanged)
            
        layout.addWidget(self.cb)
        self.setLayout(layout)
        
    def update_items(self, items):
        self.items = items

        self.cb.clear()
        self.cb.addItems(self.items)
## Instruction:
Update imports and added PyQt4 support
## Code After:
try:
    from PyQt5.QtWidgets import QWidget, QHBoxLayout, QComboBox
except ImportError:
    # needed for py3+qt4
    # Ref:
    # http://pyqt.sourceforge.net/Docs/PyQt4/incompatible_apis.html
    # http://stackoverflow.com/questions/21217399/pyqt4-qtcore-qvariant-object-instead-of-a-string
    if sys.version_info.major >= 3:
        import sip
        sip.setapi('QVariant', 2)
    from PyQt4.QtWidgets import QWidget, QHBoxLayout, QComboBox


class ComboBox(QWidget):
    def __init__(self, parent=None, items=[]):
        super(ComboBox, self).__init__(parent)

        layout = QHBoxLayout()
        self.cb = QComboBox()
        self.items = items
        self.cb.addItems(self.items)

        self.cb.currentIndexChanged.connect(parent.comboSelectionChanged)

        layout.addWidget(self.cb)
        self.setLayout(layout)

    def update_items(self, items):
        self.items = items

        self.cb.clear()
        self.cb.addItems(self.items)
