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Are you trying to (A) call `my-dataflow-script.py` from your Pulumi application or are you trying to (B) call your Pulumi application from `my-dataflow-script.py`?

(A) is supported. The best way would be to create a Dynamic Provider to call your script at the right "event" (create, update, etc) - <https://www.pulumi.com/docs/intro/concepts/resources/#dynamicproviders>.

(B) is not supported as the `pulumi` cli (engine) *must* be the invocation point of your pulumi application.

Thanks! (A) would be correct. I haven’t used dynamic providers before. Is there any tutorial/simple example of doing something like this?

Yep, we have a few blog posts about them.

<https://www.pulumi.com/blog/dynamic-providers/>
<https://www.pulumi.com/blog/architecture-as-code-vm/#provisioning-with-dynamic-providers>
<https://www.pulumi.com/blog/deploying-mysql-schemas-using-dynamic-providers/>

Just to follow up, if anyone happens to stumble on this thread later on, I followed the example in <https://www.pulumi.com/blog/deploying-mysql-schemas-using-dynamic-providers/> and managed to do what I wanted. Big thanks!