Operator ">>" not supported for types "ELB" and "list[EC2]"

[tombohub]

This example:

from diagrams import Diagram
from diagrams.aws.compute import EC2
from diagrams.aws.database import RDS
from diagrams.aws.network import ELB

with Diagram("Grouped Workers", show=False, direction="TB"):
    ELB("lb") >> [EC2("worker1"),
                  EC2("worker2"),
                  EC2("worker3"),
                  EC2("worker4"),
                  EC2("worker5")] >> RDS("events")

Causes pylance error:

Operator ">>" not supported for types "ELB" and "list[EC2]"

[tvqphuoc01]

Hi @tombohub thanks for reporting this for us we will take a look on this. 😄

[filipeaaoliveira]

Hi @tombohub @tvqphuoc01

This does raise a concern with Pylance, because indeed the expression is not assigned to any variable, however, in the context of our library, this is intentional because the purpose of the expression is to define the relationships and flow within the diagram.

We can try to work with the Pylance team, to see if we can have an exception for our use case, but I don't know if that is possible.

[tombohub]

Hi @filipeaaoliveira, ok