Hi When I run a task locally using `flow run ` it works just

Question

Hi When I run a task locally using `flow run ` it works just fine However I m running a local backend server and when I try to register the task using `flow register ` I get this error ``` File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 476 in save f self obj Call unbound method with explicit self File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 736 in save tuple save element File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 476 in save f self obj Call unbound method with explicit self File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 821 in save dict self batch setitems obj items File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 847 in batch setitems save v File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 476 in save f self obj Call unbound method with explicit self File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 821 in save dict self batch setitems obj items File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 847 in batch setitems save v File Library Frameworks Python framework Versions 3 6 lib python3 6 pickle py line 496 in save rv = reduce self proto File Users shriramholla pyenvs python3 6 lib python3 6 site packages absl flags flagvalues py line 677 in getstate raise TypeError can t pickle FlagValues TypeError can t pickle FlagValues``` Note Nothing is being passed into or being returned by any task

Anna Geller · Answer

Where did you get this syntax from Prefect 1 0 has flow register no need to register tasks separately

Shriram Holla · Answer

Oops sorry I meant `flow register`

Anna Geller · Answer

this will answer your question LMK if not <https docs prefect io orchestration flow config storage html pickle vs script based storage>

Shriram Holla · Answer

If I use a script based flow storage will it allow me to run concurrent tasks

Anna Geller · Answer

Sure yes storage is independent of the executor in 2 0 task runner

Kevin Kho · Answer

You are just returning something in a task that can t be pickled You can turn off checkpointing for the task too ``` task checkpoint=False def mytask return FlagValues```

Shriram Holla · Answer

I tried that but it didn t work That s the fishy part because I m not returning anything from any task

Kevin Kho · Answer

Ah sorry Anna is completely right If you have a global variable that is used by your tasks it gets serialized along with the Flow

Shriram Holla · Answer

I see

Shriram Holla · Answer

So here s where I m at right now I can run a flow locally but cannot register it due to the above issue I fixed this by using a script based flow storage However that requires a python script as an entrypoint But since that would mean that it doesn t run through our build system I get import errors The build system we use generates modules during compilation and converts them into executables Do you know if there s an alternate solution

Anna Geller · Answer

you can avoid that by switching to script storage the docs I shared shows that if you register via CLI it uses script storage by default ```prefect register project xyz p yourflow py```

Shriram Holla · Answer

Yeah that s what I used which ended up giving me import errors

Shriram Holla · Answer

Essentially do you know if there s a way to do ```bazel run lt register flow script gt ``` without specifying a python file

Anna Geller · Answer

I don t know bazel but you would need Prefect CLI to trigger Prefect action and bazel CLI to trigger bazel action