[PATCH] Simplified commit

Gbp-Pq: Name up_3239.patch

diff --git a/statsmodels/tools/grouputils.py b/statsmodels/tools/grouputils.py
index 8e91bbacb625319c6542e23c32a19176144ce79b..481ee99d1f3894754e83aceb1d1cda3ecc944c2f 100644 (file)
--- a/statsmodels/tools/grouputils.py
+++ b/statsmodels/tools/grouputils.py
@@ -403,6 +403,7 @@ class Grouping(object):
         """
         # TODO: refactor this
         groups = self.index.get_level_values(level).unique()
+        groups = np.array(groups)
         groups.sort()
         if isinstance(self.index, MultiIndex):
             self.slices = [self.index.get_loc_level(x, level=level)[0]