.

wcfs/internal/xbtree.py

@@ -194,14 +194,17 @@ def _keyvSliceBy(keyv, klo, khi):
     assert _keyvSorted(keyv)
     return list([k for k in keyv if (klo <= k < khi)])
 
-# iterSplitByN iterates through all nsplit splitting of [lo, hi) range.
+# _iterSplitByN iterates through all nsplit splitting of [lo, hi) range.
 # hi > lo
 # XXX nsplit > ...
 # lo <= si < hi
 # si <  s_{i+1}
 #
 # XXX remove lo and hi from the output?
-def iterSplitByN(lo, hi, nsplit): # -> [] of [lo, s1, s2, ..., sn, hi)
+def _iterSplitByN(lo, hi, nsplit): # -> [] of [lo, s1, s2, ..., sn, hi)
+    assert lo <= hi
+    assert nsplit >= 0
+
     if nsplit == 0:
         yield [lo, hi]
         return