From c3789b0e0d351aea41e293c09518fa1f1275386b Mon Sep 17 00:00:00 2001
From: Lindsey Gray <lindsey.gray@gmail.com>
Date: Wed, 23 Dec 2020 21:55:48 -0600
Subject: [PATCH] allow weights to be single numbers like values

---
 coffea/hist/hist_tools.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/coffea/hist/hist_tools.py b/coffea/hist/hist_tools.py
index 738c43a33..1ee2ebcc0 100644
--- a/coffea/hist/hist_tools.py
+++ b/coffea/hist/hist_tools.py
@@ -954,6 +954,8 @@ def fill(self, **values):
         weight = values.pop("weight", None)
         if isinstance(weight, (awkward1.Array, np.ndarray)):
             weight = coffea.util._ensure_flat(weight)
+        if isinstance(weight, numbers.Number):
+            weight = np.atleast_1d(weight)
         if not all(d.name in values for d in self._axes):
             missing = ", ".join(d.name for d in self._axes if d.name not in values)
             raise ValueError("Not all axes specified for %r.  Missing: %s" % (self, missing))