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# ask-community
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Mycchaka Kleinbort

05/26/2023, 3:24 PM
In the latest version of Dagster I'm getting warnings for passing an io_manager (the python object) to io_manager_key parameter in @asset (because it expects a string input), but I'm also getting warnings for passing it to io_makager_def (because it's experimental) Which of the two is preferable?
o

owen

05/26/2023, 4:32 PM
hi @Mycchaka Kleinbort! the behavior of passing an io manager into
io_manager_def
is (subjectively) unlikely to change, and I'd recommend going that route.