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Arguments

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keys
List[str]
required
The keys of the sets to compare.
​
weights
List[float]
default:"None"
The weights to apply to the sets.
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aggregate
"SUM" | "MIN" | "MAX"
default:"sum"
The aggregation function to apply to the sets.
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withscores
bool
default:"false"
Whether to include scores in the result.

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Response

The number of elements in the resulting set.
redis.zadd("key1", {"a": 1, "b": 2, "c": 3})

redis.zadd("key2", {"c": 3, "d": 4, "e": 5})

result = redis.zunion(["key1", "key2"])

assert result == ["a", "b", "c", "d", "e"]

redis.zadd("key1", {"a": 1, "b": 2, "c": 3})

redis.zadd("key2", {"a": 3, "b": 4, "c": 5})

result = redis.zunion(["key1", "key2"], withscores=True, aggregate="SUM")

assert result == [("a", 4), ("b", 6), ("c", 8)]

redis.zadd("key1", {"a": 1})

redis.zadd("key2", {"a": 1})

result = redis.zunion(["key1", "key2"],
                      withscores=True,
                      aggregate="SUM",
                      weights=[2, 3])

assert result == [("a", 5)]