# HLEN

> Returns the number of fields contained in the hash stored at key.

## Arguments

<ParamField body="key" type="str" required>
  The key of the hash.
</ParamField>


## Response

<ResponseField type="int" required>
  How many fields are in the hash.
</ResponseField>

<RequestExample>
```py Example
assert redis.hlen("myhash") == 0

redis.hset("myhash", values={
    "field1": "Hello",
    "field2": "World"
})

assert redis.hlen("myhash") == 2
```
</RequestExample>