Fix FutureWarning in CFTimeIndex.date_type (#2448)

spencerkclark · shoyer · commit f9c416915028 · 2018-09-30T15:16:48.000+02:00
diff --git a/xarray/coding/cftimeindex.py b/xarray/coding/cftimeindex.py
@@ -157,7 +157,7 @@ def f(self):
 
 
 def get_date_type(self):
-    if self.data:
+    if self._data.size:
         return type(self._data[0])
     else:
         return None
