Hi everyone! I built a flow a few months ago (using Prefect 2.12.0) and back then doing a local deployment through the cli worked ok:

prefect deployment run 'file-name/flow-name'

I'm now trying to do a local deployment again but receive this error message whenever I try:

cli_params = _load_json_key_values(params, "parameter")
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/fina/.local/share/virtualenvs/flow-dGAJ-ukb/lib/python3.11/site-packages/prefect/cli/deployment.py", line 1282, in _load_json_key_values
    for spec in cli_input:
TypeError: 'NoneType' object is not iterable

It seems like the cli command thinks it received a 'params' flag and that its contents are Null, when in fact it didn't. Does anyone have any ideas about what might be going on?? 🙏

If you run

prefect deployment run --help

Thank you Dev! That's not quite the issue I have: I don't want to pass in parameters through the cli. I do that through a python script:

if __name__ == "__main__":
    with open('flow_params_for_local_run.json',
              encoding='utf-8') as file:
        data = json.load(file)

    flow.serve(name="local-flow-deployment",
                           parameters={"param1": 'value1',
                                       "param2":
                                'value2'})

(Using dummy values for the params in this message). The simple command

prefect deployment run 'file-name/flow-name'

used to work a few months ago, and now it doesn't. That's the issue

Passing parameters is

.serve

is only setting the default parameters

pretty sure this is a

typer

problem @Fina Silva-Santisteban can you do

pip list | grep -E 'prefect|typer'

?

@Dev Dabke I first run the python file which sets up the worker in one terminal window, then in a second window, use the command it shows in the terminal to run a deployment. (See screenshot) It used to work fine that way, but now it doesn't. I hope this makes things more clear

if you dont want to upgrade

prefect

, you should be able to downgrade

typer

this issue breaks

prefect deploy

and

prefect deployment run

in all scenarios where a user does not have

typer

pinned below

0.10.0

Oh true! Sorry about that, I panicked for a second. I'll try that and let you know how it goes!

no worries - let me know if you hit other trouble on this!

@Nate It worked! I explicitly set it to

typer  = "==0.9.4"

in my pipfile and now things work fine again! Thanks a lot 🙏