diff --git a/src/utils/structures.py b/src/utils/structures.py
index 1e794dbea..5702836fb 100644
--- a/src/utils/structures.py
+++ b/src/utils/structures.py
@@ -121,11 +121,11 @@ class RingBuffer(object):
         if self.full:
             oidx = idx
             if type(oidx) == types.SliceType:
-                range = xrange(*slice.indices(oidx, len(self)))
-                if len(range) != len(elt):
+                range_ = xrange(*slice.indices(oidx, len(self)))
+                if len(range_) != len(elt):
                     raise ValueError, 'seq must be the same length as slice.'
                 else:
-                    for (i, x) in zip(range, elt):
+                    for (i, x) in zip(range_, elt):
                         self[i] = x
             else:
                 (m, idx) = divmod(oidx, len(self.L))
@@ -135,11 +135,11 @@ class RingBuffer(object):
                 self.L[idx] = elt
         else:
             if type(idx) == types.SliceType:
-                range = xrange(*slice.indices(idx, len(self)))
-                if len(range) != len(elt):
+                range_ = xrange(*slice.indices(idx, len(self)))
+                if len(range_) != len(elt):
                     raise ValueError, 'seq must be the same length as slice.'
                 else:
-                    for (i, x) in zip(range, elt):
+                    for (i, x) in zip(range_, elt):
                         self[i] = x
             else:
                 self.L[idx] = elt
@@ -240,15 +240,15 @@ class queue(object):
         if len(self) == 0:
             raise IndexError, 'queue index out of range'
         if type(oidx) == types.SliceType:
-            range = xrange(*slice.indices(oidx, len(self)))
-            if len(range) != len(value):
+            range_ = xrange(*slice.indices(oidx, len(self)))
+            if len(range_) != len(value):
                 raise ValueError, 'seq must be the same length as slice.'
             else:
-                for i in range:
+                for i in range_:
                     (m, idx) = divmod(oidx, len(self))
                     if m and m != -1:
                         raise IndexError, oidx
-                for (i, x) in zip(range, value):
+                for (i, x) in zip(range_, value):
                     self[i] = x
         else:
             (m, idx) = divmod(oidx, len(self))
@@ -261,8 +261,8 @@ class queue(object):
 
     def __delitem__(self, oidx):
         if type(oidx) == types.SliceType:
-            range = xrange(*slice.indices(oidx, len(self)))
-            for i in range:
+            range_ = xrange(*slice.indices(oidx, len(self)))
+            for i in range_:
                 del self[i]
         else:
             (m, idx) = divmod(oidx, len(self))