diff --git a/src/plugins/menu_qrcode.py b/src/plugins/menu_qrcode.py
index bd73b3ab..3831e89b 100644
--- a/src/plugins/menu_qrcode.py
+++ b/src/plugins/menu_qrcode.py
@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+"""
+A menu plugin showing QR-Code for bitmessage address in modal dialog.
+"""
 
 from PyQt4 import QtGui, QtCore
 import qrcode
@@ -8,6 +11,7 @@ from pybitmessage.tr import _translate
 
 # http://stackoverflow.com/questions/20452486
 class Image(qrcode.image.base.BaseImage):
+    """Image output class for qrcode using QPainter"""
     def __init__(self, border, width, box_size):
         self.border = border
         self.width = width
@@ -18,9 +22,11 @@ class Image(qrcode.image.base.BaseImage):
         self._image.fill(QtCore.Qt.white)
 
     def pixmap(self):
+        """Get image pixmap"""
         return QtGui.QPixmap.fromImage(self._image)
 
     def drawrect(self, row, col):
+        """Draw a single rectangle - implementation"""
         painter = QtGui.QPainter(self._image)
         painter.fillRect(
             (col + self.border) * self.box_size,
@@ -28,12 +34,9 @@ class Image(qrcode.image.base.BaseImage):
             self.box_size, self.box_size,
             QtCore.Qt.black)
 
-    def save(self, stream, kind=None):
-        pass
-
 
 class QRCodeDialog(QtGui.QDialog):
-
+    """The dialog"""
     def __init__(self, parent):
         super(QRCodeDialog, self).__init__(parent)
         self.image = QtGui.QLabel(self)
@@ -55,9 +58,11 @@ class QRCodeDialog(QtGui.QDialog):
         self.retranslateUi()
 
     def retranslateUi(self):
+        """A conventional Qt Designer method for dynamic l10n"""
         self.setWindowTitle(_translate("QRCodeDialog", "QR-code"))
 
     def render(self, text):
+        """Draw QR-code and address in labels"""
         self.label.setText(text)
         self.image.setPixmap(
             qrcode.make(text, image_factory=Image).pixmap())
@@ -65,7 +70,9 @@ class QRCodeDialog(QtGui.QDialog):
 
 
 def connect_plugin(form):
+    """Plugin entry point"""
     def on_action_ShowQR():
+        """A slot for popup menu action"""
         try:
             dialog = form.qrcode_dialog
         except AttributeError: