tr quality fixes

src/tr.py

@@ -1,22 +1,36 @@
+"""
+Translating text
+"""
 import os
 
 import state
 
-# This is used so that the translateText function can be used when we are in daemon mode and not using any QT functions.
+
 class translateClass:
+    """
+    This is used so that the translateText function can be used
+    when we are in daemon mode and not using any QT functions.
+    """
+    # pylint: disable=old-style-class,too-few-public-methods
     def __init__(self, context, text):
         self.context = context
         self.text = text
-    def arg(self,argument):
+
+    def arg(self, _):
+        """Replace argument placeholders"""
         if '%' in self.text:
-            return translateClass(self.context, self.text.replace('%','',1)) # This doesn't actually do anything with the arguments because we don't have a UI in which to display this information anyway.
-        else:
-            return self.text
+            # This doesn't actually do anything with the arguments
+            # because we don't have a UI in which to display this information anyway.
+            return translateClass(self.context, self.text.replace('%', '', 1))
+        return self.text
 
-def _translate(context, text, disambiguation = None, encoding = None, n = None):
+
+def _translate(context, text, disambiguation=None, encoding=None, n=None):    # pylint: disable=unused-argument
     return translateText(context, text, n)
 
-def translateText(context, text, n = None):
+
+def translateText(context, text, n=None):
+    """Translate text in context"""
     try:
         enableGUI = state.enableGUI
     except AttributeError:  # inside the plugin
@@ -25,15 +39,17 @@ def translateText(context, text, n = None):
         try:
             from PyQt4 import QtCore, QtGui
         except Exception as err:
-            print 'PyBitmessage requires PyQt unless you want to run it as a daemon and interact with it using the API. You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download   or by searching Google for \'PyQt Download\'. If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon'
+            print 'PyBitmessage requires PyQt unless you want to run it as a daemon'\
+                ' and interact with it using the API.'\
+                ' You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download'\
+                ' or by searching Google for \'PyQt Download\'.'\
+                ' If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon'
             print 'Error message:', err
-            os._exit(0)
+            os._exit(0)    # pylint: disable=protected-access
         if n is None:
             return QtGui.QApplication.translate(context, text)
-        else:
-            return QtGui.QApplication.translate(context, text, None, QtCore.QCoreApplication.CodecForTr, n)
+        return QtGui.QApplication.translate(context, text, None, QtCore.QCoreApplication.CodecForTr, n)
     else:
         if '%' in text:
-            return translateClass(context, text.replace('%','',1))
-        else:
-            return text
+            return translateClass(context, text.replace('%', '', 1))
+        return text