hey all im trying to pass a task s result to a function that

Question

hey all im trying to pass a task s result to a function that s not a task I m getting `TypeError not all arguments converted during string formatting` is there a way to get the parameter s value without giving function with a task decorator

Nate · Answer

Hi < Jon> Since the `prefect Parameter` is a special type of `task` object it must be used in a flow context so this approach may not work what are you trying to accomplish by passing parameters to regular python functions

Jon · Answer

thanks < Nate> i just made an edit it s a task s result not a parameter

Jon · Answer

we are web scraping and have some utility function like for logging in ``` task def get login credentials task def extract with headless browser login credentials some logic to spin up a browser not a task just some imported fn page logged in = browser utils login page LOGIN URL USERNAME LABEL PASSWORD LABEL SIGN IN BUTTON TEXT login credentials username login credentials password scrape something with Flow as f credentials = get login credentials extract with headless browser credentials ```

Jon · Answer

ideally `browser utils login` would have a task decorator but doesn t seem we can serialize a headless browser sweat smile

Nate · Answer

so it looks like `credentials` is some dict like return value of `get login credentials` which becomes `login credentials` in the scope of `extract with headless browser` which looks totally fine to me can you show the stack trace I m wondering which line actually threw that error

Jon · Answer

```Task extract electricity amr reports Exception encountered during task execution Traceback most recent call last File Users jonyoung Dev workflows venv lib python3 9 site packages prefect engine task runner py line 880 in get task run state value = prefect utilities executors run task with timeout File Users jonyoung Dev workflows venv lib python3 9 site packages prefect utilities executors py line 468 in run task with timeout return task run args kwargs type ignore File lt string gt line 39 in extract electricity amr reports File Users jonyoung Dev workflows workflows common browser utils py line 81 in login <http logger info|logger info> username password File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 1446 in info self log INFO msg args kwargs File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 1589 in log self handle record File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 1599 in handle self callHandlers record File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 1661 in callHandlers hdlr handle record File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 952 in handle self emit record File Users jonyoung Dev workflows venv lib python3 9 site packages prefect utilities logging py line 184 in emit msg = self format record File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 927 in format return fmt format record File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 663 in format record message = record getMessage File Users jonyoung pyenv versions 3 9 13 lib python3 9 logging init py line 367 in getMessage msg = msg self args TypeError not all arguments converted during string formatting```

Jon · Answer

that stack trace shows the logger unhappy about `username` and `password`

Jon · Answer

i think same error w o using the logger

Nate · Answer

so I reproduced that error just by passing multiple args to our logger like ```from prefect import Flow import prefect with Flow f as f logger = prefect context get logger Hello World f run ``` ``` File Users nate opt miniconda3 envs prefect 1 lib python3 8 logging init py line 373 in getMessage msg = msg self args TypeError not all arguments converted during string formatting``` can you just do ` f username= password= ` instead of passing multiple args

Jon · Answer

that fixed it

Jon · Answer

thanks face palm

Nate · Answer

great to hear smile sure thing

Jon · Answer

appreciate it