The Modal class does not exist in the current modal module. I haven’t used this package in a while, but I feel like it may have in an older version.

Either way, the correct way to create an instance of the modal client is to use the App class.

import modal
app = modal.App("example-hello-world")

This is right from their hello world example.

Then, every function just uses app for a decorator:

@app.function()
def f(i):
    if i % 2 == 0:
        print("hello", i)
    else:
        print("world", i, file=sys.stderr)

    return i * i

(Once again, this is copy paste from the docs)

Modal’s docs are really good. I see you have applied the batch-processing tag to your post. After looking at the hello world example, consider looking at the scaling out gide.

I don’t know what your specific problem is without any more context, so I can’t do much more than guess that these suggestions will be helpful. Once again, modal has really good documentation and examples.