# ZINTERSTORE

> Calculates the intersection of sets and stores the result in a key

## Arguments 

<ParamField body="destination" type="str" required>
  The key to store the result in.
</ParamField>

<ParamField body="keys" type="List[str]" required>
  The keys of the sets to compare.
</ParamField>

<ParamField body="weights" type="List[float]" default="None">
  The weights to apply to the sets.
</ParamField>

<ParamField body="aggregate" type='"SUM" | "MIN" | "MAX"' default="sum">
  The aggregation function to apply to the sets.
</ParamField>

<ParamField body="withscores" type="bool" default="false">
  Whether to include scores in the result.
</ParamField>

## Response

## Response

<ResponseField  required>
    The number of elements in the resulting set.
</ResponseField>

<RequestExample>
```py Simple
redis.zadd("key1", {"a": 1, "b": 2, "c": 3})

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

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

assert result == 1
```

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

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

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

assert result == 3
```

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

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

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

assert result == 1
```
</RequestExample>