> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# SUNION

> Return the union between sets

## Arguments

<ParamField body="keys" type="*List[str]" required>
  The keys of the sets to perform the union operation on.
</ParamField>

## Response

<ResponseField type="set[str]" required>
  The resulting set
</ResponseField>

<RequestExample>
  ```py Example  theme={null}
  redis.sadd("key1", "a", "b", "c")

  redis.sadd("key2", "c", "d", "e")

  assert redis.sunion("key1", "key2") == {"a", "b", "c", "d", "e"}
  ```
</RequestExample>


## Related topics

- [SUNION](/redis/sdks/ts/commands/set/sunion.md)
- [SUNIONCARD](/redis/commands/set/sunioncard.md)
- [SUNIONSTORE](/redis/sdks/py/commands/set/sunionstore.md)