[Mypyspace-developer] SF.net SVN: mypyspace:[353] graphRDF/branches/songsAsNodes

[<gea...@us...>]

Revision: 353
          http://mypyspace.svn.sourceforge.net/mypyspace/?rev=353&view=rev
Author:   gearmonkey
Date:     2009-05-27 21:19:59 +0000 (Wed, 27 May 2009)

Log Message:
-----------
more auto-format detection 
added a new file with some common helper functions
also a new executable that is designed to be the entry point for the backend of the radio player.

At some point fairly soon the svn may need some restructuring.

Modified Paths:
--------------
    graphRDF/branches/songsAsNodes/loadWeights.py

Added Paths:
-----------
    graphRDF/branches/songsAsNodes/common.py
    graphRDF/branches/songsAsNodes/radioCore.py

Added: graphRDF/branches/songsAsNodes/common.py
===================================================================
--- graphRDF/branches/songsAsNodes/common.py	                        (rev 0)
+++ graphRDF/branches/songsAsNodes/common.py	2009-05-27 21:19:59 UTC (rev 353)
@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+# encoding: utf-8
+"""
+common.py
+
+Some common functions to speed access for song graphs
+
+Created by Benjamin Fields on 2009-05-18.
+Copyright (c) 2009 Goldsmiths University of London. All rights reserved.
+"""
+
+import sys
+import os
+import os.path
+import igraph
+import graphRDF
+
+def getTrackList(graph, nodeList):
+	trackList = []
+	for vert in nodeList:
+		trackList.append(graph.vs[vert]['track'])
+	return trackList
+
+def avgDelta(graph, nodeList):
+	delta = 0
+	for idx, node in enumerate(nodeList[1:]):
+		delta += igraph.EdgeSeq(graph, [nodeList[idx], node])[0]['audioWeight']
+	return delta/(len(nodeList)-1) 
+
+def deltaList(graph, nodeList):
+	deltaList = []
+	for idx, node in enumerate(nodeList[1:]):
+		deltaList.append(igraph.EdgeSeq(graph, [nodeList[idx], node])[0]['audioWeight'])
+	return deltaList
+	
+
+	
+def main():
+	pass
+
+
+if __name__ == '__main__':
+	main()
+

Modified: graphRDF/branches/songsAsNodes/loadWeights.py
===================================================================
--- graphRDF/branches/songsAsNodes/loadWeights.py	2009-05-27 21:16:28 UTC (rev 352)
+++ graphRDF/branches/songsAsNodes/loadWeights.py	2009-05-27 21:19:59 UTC (rev 353)
@@ -104,7 +104,7 @@
 		 	typoOutHandle.write(str(idx) + " : typo : " + line)
 		 	typoOutHandle.flush()
 		 	typos += 1
-			print >> sys.stderr, str(err) + "\n" + str(typos) + " typos found."
+			print >> sys.stderr, str(Exception) + " : " + str(err) + "\n" + str(typos) + " typos found."
 			continue
 		
 		foundWeight += 1

Added: graphRDF/branches/songsAsNodes/radioCore.py
===================================================================
--- graphRDF/branches/songsAsNodes/radioCore.py	                        (rev 0)
+++ graphRDF/branches/songsAsNodes/radioCore.py	2009-05-27 21:19:59 UTC (rev 353)
@@ -0,0 +1,130 @@
+#!/usr/bin/env python
+# encoding: utf-8
+"""
+radioCore.py
+
+This is the entry point for the backend of 
+
+Created by Benjamin Fields on 2009-05-21.
+Copyright (c) 2009 Goldsmiths University of London. All rights reserved.
+"""
+
+import sys
+import getopt
+import igraph
+import graphRDF
+from common import *
+
+
+help_message = '''
+Core utility end point to the automatic ong selection and aggregation toolkit, built around mypyspace's graphRDF project.
+
+modes available:
+	help			print this message and exit
+	
+	makePlaylist	create a playlist for MP3Broadcaster.  Args as follows:
+		
+		>radioCore.py makePlaylist [options] graph.graphmlz srcNode destNode outfile.playlist
+	
+		graph.graphmlz     -- the graph that will be used 
+					--note this may change to a pickled igraph to speed load time.--
+		srcNode            -- where the playlist will start, specified as a filename that exists in graph.graphmlz
+		destNode           -- where the playlist will end, specified as a filename that exists in graph.graphmlz
+		outfile.playlist   -- the full path where the playlist will be written.
+		
+	destFinder		given various circumstances determine all possible destination nodes for a 
+'''
+
+playlistheader = """*PLAY-LIST*
+#
+# Created by radioCore.py
+#
+"""
+
+class Usage(Exception):
+	def __init__(self, msg):
+		self.msg = msg
+
+
+def main(argv=None):
+	verbose = False
+	weighted = True
+	if argv is None:
+		argv = sys.argv
+	try:
+		if len(argv) < 2:
+			raise Usage(help_message)
+		if argv[1] == 'help':
+			raise Usage(help_message)
+		elif argv[1] == 'makePlaylist':
+			if len(argv) < 6:
+				raise Usage(help_message)
+			mode = 'makePlaylist'
+			graphFile = argv[-4]
+			srcNode = argv[-3]
+			destNode = argv[-2]
+			outfile = argv[-1]
+			if len(argv) > 6:
+				generalOpts = argv[2:-4]
+			else:
+				generalOpts = []
+		elif argv[1] == 'destFinder':
+			mode = 'destFinder'
+			
+		else:
+			raise Usage("Poor mode specification.  Run 'radioCore.py help' for more detailed usage.")
+		try:
+			opts, args = getopt.getopt(generalOpts, "hvw", ["help", "vebose", "unweighted"])
+		except getopt.error, msg:
+			raise Usage(msg)
+	
+		# option processing
+		for option, value in opts:
+			if option == ("-v", "--verbose"):
+				verbose = True
+			if option in ("-h", "--help"):
+				raise Usage(help_message)
+			if option in ("-w", "--unweighted"):
+				weighted = False
+	
+	except Usage, err:
+		print >> sys.stderr, sys.argv[0].split("/")[-1] + ": " + str(err.msg)
+		print >> sys.stderr, "\t for help use --help"
+		return 2
+	songGraph = graphRDF.graph('media_seed_134901208')
+	if mode == 'makePlaylist':
+		try:
+			outHandle = open(outfile, 'w')
+			if os.path.splitext(graphFile)[1] in ['.pkl', '.pickle']:
+				songGraph.S = igraph.Graph.Load(graphFile, format='pickle')
+			elif os.path.splitext(graphFile)[1] in ['.mlz', '.graphmlz']:
+				songGraph.S = igraph.Graph.Load(graphFile, format='graphmlz')
+			else:
+				songGraph.S = igraph.Graph.Load(graphFile)
+		except Exception, err:
+			print >> sys.stderr, sys.argv[0].split("/")[-1] + ": " + str(err)
+			print >> sys.stderr, "\t for help use --help"
+			return 12
+		if weighted and (len(songGraph.S.es.select(audioWeight_lt=0)) > 0):
+			print "radioCore.py: makePlaylist: WARNING: attempting to use weights, but some of the weights are negative.  This may cause in some odd results."
+		try:
+			srcIDX = songGraph.S.vs.select(track=srcNode)[0].index
+			destIDX = songGraph.S.vs.select(track=destNode)[0].index
+		except Exception, err:
+			print >> sys.stderr, sys.argv[0].split("/")[-1] + ": " + str(err)
+			print >> sys.stderr, "\t source or destination track path poorly specified, unable to dereference."
+			return 13
+		outHandle.write(playlistheader)
+		if weighted:
+			trackList = getTrackList(songGraph.S, songGraph.shortestPath(srcIDX, destIDX, graph='S', weight='audioWeight'))
+		else:
+			trackList = getTrackList(songGraph.S, songGraph.shortestPath(srcIDX, destIDX, graph='S', weight=None))
+		
+		for track in trackList:
+			outHandle.write('"'+track +'" 5\n')
+		outHandle.close()
+			
+
+
+if __name__ == "__main__":
+	sys.exit(main())


Property changes on: graphRDF/branches/songsAsNodes/radioCore.py
___________________________________________________________________
Added: svn:executable
   + *


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