How to setup the redisearch configuration in flask?

Question

I'm trying to use the below code. But configuration setup not yet mentioned here. Searched so many blogs but not found.

from redisearch import Client, TextField, IndexDefinition, Query

# Creating a client with a given index name
client = Client("myIndex")

# IndexDefinition is available for RediSearch 2.0+
definition = IndexDefinition(prefix=['doc:', 'article:'])

# Creating the index definition and schema
client.create_index((TextField("title", weight=5.0), TextField("body")), definition=definition)

# Indexing a document for RediSearch 2.0+
client.redis.hset('doc:1',
                mapping={
                    'title': 'RediSearch',
                    'body': 'Redisearch impements a search engine on top of redis'
                })

# Indexing a document for RediSearch 1.x
client.add_document(
    "doc:2",
    title="RediSearch",
    body="Redisearch implements a search engine on top of redis",
)

# Simple search
res = client.search("search engine")

# the result has the total number of results, and a list of documents
print(res.total) # "2"
print(res.docs[0].title) # "RediSearch"

# Searching with complex parameters:
q = Query("search engine").verbatim().no_content().with_scores().paging(0, 5)
res = client.search(q)

I'm getting the below error like this:

redis.exceptions.ResponseError
redis.exceptions.ResponseError: unknown command `FT.SEARCH`, with args beginning with: `myIndex`, `search engine`, `LIMIT`, `0`, `10`,