Add a documentation note about calling `pipe.multi()` prior to write commands
Fixes
@@ -505,6 +505,9 @@ which is much easier to read:
>>> r.transaction(client_side_incr, 'OUR-SEQUENCE-KEY')
[True]
+Be sure to call `pipe.multi()` in the callable passed to `Redis.transaction`
+prior to any write commands.
+
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^^^^^^^^^^^^^^^^^^^
