Hi team! I am trying to use

dagster.EnvVar

to load an environment variable while constructing a resource. I am doing something like this:

configured_cassandra_resource = Cassandra(
    clusters=os.getenv("CASSANDRA_CLUSTERS").split(),
    port=<http://EnvVar.int|EnvVar.int>("CASSANDRA_PORT"),
    user=EnvVar("CASSANDRA_USER"),
    password=EnvVar("CASSANDRA_PASSWORD")
)

Is there a way to use EnvVar and load the environment variable

CASSANDRA_CLUSTERS

as an array?

EnvVar("CASSANDRA_CLUSTERS").split()

does not work as it returns

["CASSANDRA_CLUSTERS"]

as the value (see screenshot) Alternatively, is there a more elegant way to supply an array of string to

Cassandra.clusters

?

You probably have to strip first before you split.

.strip("][").split(",")

Hey Bolin! Unfortunately, resolving arrays from environment variables is hard, but can you use

EnvVar

to take a string of comma-separated values and then split them within your custom resource at runtime?

Yeap, I will do that, thank you both!