From a7ea9da52b9eb4160e112568e3a358b71bfc6b9b Mon Sep 17 00:00:00 2001
From: Andrei Lapets <a@lapets.io>
Date: Wed, 8 Nov 2023 11:33:20 -0500
Subject: [PATCH] Merge dictionaries in a backwards-compatible way.

---
 src/tinynmc/tinynmc.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/tinynmc/tinynmc.py b/src/tinynmc/tinynmc.py
index b5c0ee5..241843e 100644
--- a/src/tinynmc/tinynmc.py
+++ b/src/tinynmc/tinynmc.py
@@ -13,6 +13,12 @@
 def _prod(iterable):
     return functools.reduce(operator.mul, iterable)
 
+def _merge(d, d_):
+    d__ = {}
+    d__.update(d)
+    d__.update(d_)
+    return d__
+
 def _shares(s, modulus, quantity) -> list[mod]:
     ss = []
     for _ in range(quantity - 1):
@@ -108,8 +114,7 @@ def compute(self, signature, mfss):
         """
         # Combine all submitted coordinate-particle pair dictionaries
         # into a single dictionary.
-        # pylint: disable=consider-using-generator
-        mfs = functools.reduce((lambda mfs, mfs_: mfs | mfs_), mfss)
+        mfs = functools.reduce(_merge, mfss)
 
         # Compute this node's share of the overall sum of products.
         return sum([