Why is the workflow definition in the DSL sample project deterministic?

Community Support
1

Hi, I’m currently taking the Temporal 102 course, and it mentions that workflow definitions must be deterministic. However, the workflow in the Python DSL sample appears to me to be non-deterministic in the following part:

        elif isinstance(stmt, ParallelStatement):
            await asyncio.gather(
                *[self.execute_statement(branch) for branch in stmt.parallel.branches]
            )

Couldn’t this potentially generate commands in a different order?

I need this ParallelStatement feature for my intepreter DSL workflow

Thanks!

2

It is deterministic as Temporal uses a custom async io loop:

1 Like
3

Thank you, Maxim!