jrwalk commented on issue #7870: migrate from `dill` to `cloudpickle` for advanced serialization URL: https://github.com/apache/airflow/issues/7870#issuecomment-605065110 so `dill` is optional to use (set by a flag in the `PythonVirtualenvOperator`) but is always imported and treated as a required dependency for Airflow, right? Keeping that pattern it should be super easy to cut over to `cloudpickle`. I'd generally advocate for allowing fewer dependencies though, so it could be nice to make `cloudpickle` a proper extra-dependency and put some checks around the import. That would let people keep minimal environments if they choose/need to. I've also run into situations where it wasn't being used (no virtualenv operators in my dag) but because it was imported `dill` was still getting captured by serializers like `cloudpickle` since they scoop up a fair amount of runtime environment information.
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