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# ZDIFF

> Returns the difference between sets.

## Arguments 

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

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

## Response

<ResponseField type="List[str] | List[Tuple[str, float]]">
  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.zdiff(["key1", "key2"])

assert result == ["a", "b"]
```

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

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

result = redis.zdiff(["key1", "key2"], withscores=True)

assert result == [("a", 1), ("b", 2)]
```
</RequestExample>