Redis Delete All Keys in Python (Detailed Guide w/ Code Examples)

Use Case(s)

In many scenarios, you may need to clear your Redis database. This could be during development when the data structure changes or when you need to reset the cache in production.

Code Examples

You can use the flushdb command to delete all keys from the current database or flushall to delete all keys from all databases. Here is how you can do it using python's redis library:

import redis
r = redis.Redis(host='localhost', port=6379, db=0)
r.flushdb()

In this example, we connect to the Redis server running on localhost and select database 0. Then we call the flushdb method of the Redis instance to delete all keys from the currently selected database (db 0).

If you want to delete all keys from all databases, you can use the flushall command like this:

import redis
r = redis.Redis(host='localhost', port=6379, db=0)
r.flushall()

Best Practices

It's important to use these commands with caution because they will irrevocably delete data. It's also recommended not to use flushall in production environments, as it will affect all databases in your Redis instance, not just the one you're connected to.

Common Mistakes

A common mistake is to misuse flushdb and flushall. Remember, flushdb only removes keys from the current database, whereas flushall removes keys from all databases.

FAQs

Q: Can I undo a flushdb or flushall?

A: No, once executed these commands cannot be undone. Be sure to use them with caution.