added shape_padright, and renamed leftpad_shape -> shape_padleft

tensor/basic.py

@@ -1559,11 +1559,24 @@ def join(axis, *tensors):
     """
 
 @constructor
-def leftpad_shape(tensor, n_ones):
-    """Reshape `tensor` by left-padding the shape with `n_ones` 1s"""
+def shape_padleft(tensor, n_ones):
+    """Reshape `tensor` by left-padding the shape with `n_ones` 1s
+    
+    See also: `shape_padright` and `Dimshuffle`
+    """
+
     pattern = ['x']*n_ones + [i for i in range(tensor.type.ndim)]
     return DimShuffle(tensor.broadcastable, pattern)(tensor)
 
+@constructor
+def shape_padright(tensor, n_ones):
+    """Reshape `tensor` by right-padding the shape with `n_ones` 1s
+    
+    See also: `shape_padleft` and `Dimshuffle`
+    """
+    pattern = [i for i in range(tensor.type.ndim)] + ['x']*n_ones
+    return DimShuffle(tensor.broadcastable, pattern)(tensor)
+
 @constructor
 def stack(*tensors):
     """Insert the arguments as slices into a tensor of 1 rank greater.