update

utils/dict_utils.py

@@ -0,0 +1,16 @@
+def add_dict_b_to_dict_a(dict_a, dict_b):
+    for key, value in dict_b.items():
+        dict_a[key] = dict_a.get(key, 0) + value
+    return dict_a
+
+
+if __name__ == "__main__":
+    # for example
+    # source: https://stackoverflow.com/a/35689816
+    from functools import reduce
+
+    a = {"a": 10, "b": 20}
+    b = {"b": 22, "c": 60}
+    c = {"b": 1}
+    res = reduce(add_dict_b_to_dict_a, [a, b, c], dict())
+    print(res)