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Prefect Community

Are task `run` methods allowed to return arbitrary objects?
```class ReturnObject:
  def__init__(self, value: str = "hello", list: List = ["world"]):
    self.value = value
    self.list = list

class MyTask(Task):
  def run(self) -&gt; ReturnObject:
    return ReturnObject("some value", ["a", "b", "c"])

task = MyTask()

with Flow() as flow:
  result = task()
  some_other_task(param1=result.value, param2=result.list)```
If I try to run this code, I’ll get an error like
```AttributeError: 'MyTask' object has no attribute 'value'```

If I want to return different type objects from a task to be used in subsequent tasks, what is the Prefect way of doing this?

Hi Josh - you’re conflating runtime with build time; the result of the first task isn’t available until you’ve run the code, the flow context manager is only building the dependency structure.

You _can_ return arbitrary objects from tasks but you cannot access their attributes as you’re doing here — instead you should perform that attribute access within `some_other_task`