Cannot import name 'GraphQL' from 'strawberry.fastapi'

I am trying to run an strawberry example from this tutorial but it does not work.

I have the code:

from fastapi import FastAPI
import strawberry
from strawberry.fastapi import GraphQL


@strawberry.type
class Book:
   title: str
   author: str
   price: int

@strawberry.type
class Query:
   @strawberry.field
   def book(self) -> Book:
      return Book(title="Computer Fundamentals", author="Sinha", price=300)

schema = strawberry.Schema(query=Query)

graphql_app = GraphQL(schema)
app = FastAPI()

app.add_route("/book", graphql_app)
app.add_websocket_route("/book", graphql_app)

but when I try to run it with uvicorn Mystrawberry:app --reload
it says

ImportError: cannot import name 'GraphQL' from 'strawberry.fastapi' 

Now, in the Strawberry documentation examples they use GraphQLRouter rather than GraphQL, and I don't know if that is an old version or a typo.

It would seem your tutorial is incorrect or out of date. Take a look at the official documentation, it seems like the way to do it is to do from strawberry.fastapi import GraphQLRouter, and include that router in your FastAPI application.