further clarification on mapping argument of MSET, MSETNX, and ZADD
@@ -110,7 +110,9 @@ styles caused issues when Redis introduced optional flags to ZADD. Relying on
the argument names in the method signature.
To resolve this, redis-py 3.0 has changed these three commands to all accept
-a single positional argument named mapping that is expected to be a dict.
+a single positional argument named mapping that is expected to be a dict. For
+MSET and MSETNX, the dict is a mapping of key-names -> values. For ZADD, the
+dict is a mapping of element-names -> score.
MSET, MSETNX and ZADD now look like:
