# KEYS

> Returns all keys matching pattern.

<Warning>
This command can block the database for an extended period, especially with large datasets. We recommend using [SCAN](/redis/sdks/py/commands/generic/scan) instead for production environments.

This command will return an error for databases containing more than 100,000 entries.
</Warning>


## Arguments

<ParamField body="match" type="str" required>
  A glob-style pattern. Use `*` to match all keys.
</ParamField>

## Response

<ResponseField type="List[str]">
  Array of keys matching the pattern.
</ResponseField>

<RequestExample>
```py Example
keys = redis.keys("prefix*")
```
```py Match All
keys = redis.keys("*")
```
</RequestExample>