Using a hash in Redis is common when you need to group related key-value pairs under a single key. This might be useful, for example, when storing an object with multiple fields (like a user with username
, email
, etc). The keyword 'python redis get hash values at key' refers to retrieving all the values of a hash stored at a specific key.
In Python, we can use the redis-py
library's hgetall()
method to retrieve all fields and their values from a hash stored at a specific key. Here's how:
import redis # Establish a connection r = redis.Redis(host='localhost', port=6379, db=0) # Set some hash values r.hset('user:1000', 'username', 'john_doe') # Get hash values at key user_values = r.hgetall('user:1000') print(user_values)
This will output:
{b'username': b'john_doe'}
Which is a dictionary where both keys and values are byte strings. To get them as normal strings, you might want to decode them:
user_values_decoded = {k.decode('utf-8'): v.decode('utf-8') for k, v in user_values.items()} print(user_values_decoded)
This results in:
{'username': 'john_doe'}
with
statement is a good practice as it automatically closes the connection.hgetall()
will return an empty dictionary.hgetall
function will return an empty dictionary.Dragonfly is fully compatible with the Redis ecosystem and requires no code changes to implement.