Removed workflow being dependent on rpy by putting the import within the run function of affymatrix import.

workflows/go_workflow.py

@@ -6,7 +6,6 @@ import plots
 import dataset
 #import geneontology
 #import gostat
-import rpy
 from scipy import array,randn
 import cPickle
 
@@ -172,6 +171,7 @@ class CelFileImportFunction(Function):
         Function.__init__(self, 'cel_import', 'Import Affy')
 
     def run(self, data):
+        import rpy
         chooser = gtk.FileChooserDialog(title="Select cel files...", parent=None,
                                         action=gtk.FILE_CHOOSER_ACTION_OPEN,
                                         buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,