MAINT: fix histogram*d dispatchers

fixes GH-13728

1 files changed, 8 insertions, 1 deletions

diff --git a/numpy/lib/histograms.py b/numpy/lib/histograms.py
index 5bcedc7f4..478fbc783 100644
--- a/numpy/lib/histograms.py
+++ b/numpy/lib/histograms.py
@@ -3,6 +3,7 @@ Histogram-related functions
 """
 from __future__ import division, absolute_import, print_function
 
+import contextlib
 import functools
 import operator
 import warnings
@@ -922,7 +923,13 @@ def histogram(a, bins=10, range=None, normed=None, weights=None,
 
 def _histogramdd_dispatcher(sample, bins=None, range=None, normed=None,
                             weights=None, density=None):
-    return (sample, bins, weights)
+    if hasattr(sample, 'shape'):  # same condition as used in histogramdd
+        yield sample
+    else:
+        yield from sample
+    with contextlib.supress(TypeError):
+        yield from bins
+    yield weights
 
 
 @array_function_dispatch(_histogramdd_dispatcher)