Mercurial > pylearn

diff dataset.py @ 422:32c5f87bc54e

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Added __len__ to HStackedDataSet and replaced default len() by sys.maxint instead of None
author Yoshua Bengio <bengioy@iro.umontreal.ca>
date Sat, 19 Jul 2008 14:12:41 -0400
parents 835830e52b42
children 0231eeac11c9
line wrap: on
line diff
--- a/dataset.py	Sat Jul 19 10:11:22 2008 -0400
+++ b/dataset.py	Sat Jul 19 14:12:41 2008 -0400
@@ -220,7 +220,8 @@
         Sub-classes which implement finite-length datasets should redefine this method.
         Some methods only make sense for finite-length datasets.
         """
-        return None
+        from sys import maxint
+        return maxint
 
 
     class MinibatchToSingleExampleIterator(object):
@@ -943,6 +944,9 @@
             del self.fieldname2dataset[fieldname]
             self.fieldname2dataset[rename_field(fieldname,self.datasets[i],i)]=i
             
+    def __len__(self):
+        return len(self.datasets[0])
+    
     def hasFields(self,*fieldnames):
         for fieldname in fieldnames:
             if not fieldname in self.fieldname2dataset: