Redis with Python (redis-py) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to connect to a Redis server running on localhost.

Redis

import redis
r = redis.Redis(host=[1], port=6379)

Drag options to blanks, or click blank then click option'

A"0.0.0.0"

B"127.0.0.1"

C"redis"

D"localhost"

Attempts:

3 left

💡 Hint

Common Mistakes

Using an incorrect hostname that does not point to the local machine.

Leaving the host parameter empty.

The Redis client connects to the Redis server on the local machine using the hostname "localhost".

2fill in blank

medium

Complete the code to set a key "user" with value "Alice" in Redis.

Redis

r.set([1], "Alice")

Drag options to blanks, or click blank then click option'

A"user"

B"name"

C"username"

D"id"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different key name than "user".

Forgetting to put the key name in quotes.

The key "user" is used to store the value "Alice" in Redis.

3fill in blank

hard

Fix the error in the code to get the value of key "user" from Redis.

Redis

value = r.get([1])
print(value.decode('utf-8'))

Drag options to blanks, or click blank then click option'

Auser

B"user"

C'user'

Duser_key

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key name without quotes causing a NameError.

Using a variable name that is not defined.

The key must be a string in quotes when calling r.get(). Without quotes, it is treated as a variable which causes an error.

4fill in blank

hard

Fill both blanks to increment the integer value stored at key "counter" by 1.

Redis

r.[1]([2])

Drag options to blanks, or click blank then click option'

Aincr

Bdecr

C"counter"

D"count"

Attempts:

3 left

💡 Hint

Common Mistakes

Using decr which decreases the value.

Using the wrong key name.

The incr method increments the integer value stored at the given key. The key is "counter" as specified.

5fill in blank

hard

Fill all three blanks to create a Redis hash named "session" with fields "user", "status", and "count".

Redis

r.hset([1], mapping=[2]: "active", [3]: 5})

Drag options to blanks, or click blank then click option'

A"session"

B"user"

C"count"

D"status"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up field names or hash key name.

Not using quotes around string keys.

The hash key is "session". The fields include "status" with value "active" and "count" with value 5. The field "user" is not included in the mapping here.