Improve iTunesParser

Doc + var name for PEP8

iTunesParser.py

@@ -60,33 +60,52 @@ class SetEncoder(json.JSONEncoder):
 
 
 class ITunesParser:
+    """
+        Parse an iTunes Library and produce JSON - for ELS
+    """
     def __init__(self, libraryFile):
         self._albums = {}
         self._artists = {}
         self.libraryFile = libraryFile
 
     def toJson(self):
-        output = self._processSongs()
+        """
+            Just do processSong() - This method suck
+        """
+
+        ret = self._processSongs()
 
 #        self._writeArtists()
 #        self._writeAlbums()
 
         # return json.dumps(jsonObj, indent=indent, cls=SetEncoder)
-        return output
+        return ret
 
-    def toJsonP(self, rating=4):
-        json = self.toJson()
-        jsonp = ';itgCallback(' + json + ');'
+    def toJsonP(self): # TODO parameter, rating=4):
+        """
+            Produce JSON-P content
+        """
+
+        jsonContent = self.toJson()
+        jsonp = ';itgCallback(' + jsonContent + ');'
         return jsonp
 
 
     def _readTracks(self):
+        """
+            Read library and return Tracks part
+        """
         pl = plistlib.readPlist(self.libraryFile)
         return pl['Tracks']
 
     def _processSongs(self):
+        """
+            Return an output JSON for an ELS Bulk request - Not a correct format
+            TODO Just return a _correct_ JSON and treat in another place/class
+        """
+
         tracks = self._readTracks()
-        output = ""
+        ret = ""
 
         for k in tracks:
             track = tracks[k]
@@ -107,13 +126,17 @@ class ITunesParser:
             # Retrieve for each track album information
             self._processAlbum(track)
 
-            output += json.dumps(jsonTrackIndic, indent=None, cls=SetEncoder)
-            output += "\n"
-            output += json.dumps(track, indent=None, cls=SetEncoder)
-            output += "\n"
-        return output
+            ret += json.dumps(jsonTrackIndic, indent=None, cls=SetEncoder)
+            ret += "\n"
+            ret += json.dumps(track, indent=None, cls=SetEncoder)
+            ret += "\n"
+        return ret
 
     def _processArtist(self, track):
+        """
+            Process artists in the track part of library and return a JSON formated for a bulk ELS request
+        """
+
         if 'Artist' not in track:
             return
 
@@ -144,6 +167,10 @@ class ITunesParser:
         return
 
     def _processAlbum(self, track):
+        """
+            Process albums in the track part of library and return a JSON formated for a bulk ELS request
+        """
+
         if 'Album' not in track:
             return