Validation on number of inputs added

workflows/pca_workflow.py

@@ -49,7 +49,7 @@ class LoadAnnotationsFunction(Function):
             logger.log('notice', 'Reading file: %s' % dialog.get_filename())
             self.load_affy_file(dialog.get_filename())
 
-    def run(self, (data,)):
+    def run(self,data):
         btns = ('Open', gtk.RESPONSE_OK, \
                 'Cancel', gtk.RESPONSE_CANCEL)
         dialog = gtk.FileChooserDialog('Open Affy Annotation File',
@@ -81,7 +81,7 @@ class PCAFunction(Function):
         self.output = None
         self.workflow = workflow
         
-    def run(self, (data,)):
+    def run(self,data):
         logger.log('debug', 'datatype: %s' % type(data))
         if not isinstance(data,dataset.Dataset):
             return None
@@ -226,7 +226,7 @@ class LoadMoothaData(Function):
     def __init__(self):
         Function.__init__(self, 'load', 'Load diabetes data')
 
-    def run(self,(data,)):
+    def run(self,data):
         data_file = open('full_data.pickle','r')
         data = pickle.load(data_file)
         data_file.close()
@@ -250,7 +250,7 @@ class Log2Function(Function):
     def __init__(self):
         Function.__init__(self, 'log', 'Log2')
 
-    def run(self,(data,)):
+    def run(self,data):
         x = log2(data._array)
         #pull out identifiers
         ids = []