how do you do flow run value=5 and only show the output inst

Question

how do you do flow run value=5 and only show the output instead of all the flow states

Jenny · Answer

Hello Can you give a little more detail What tasks are you running When you say show do you mean in the logs Thanks

DiffyBron · Answer

Hello Jenny I m trying to run the following and the output includes the flow logs which i m trying to omit when i run `python test py` ```from prefect import Flow Parameter task from prefect tasks control flow import ifelse task def check if even value return value 2 == 0 task def print even value print is even format value task def print odd value print is even format value if name == main with Flow Check even or odd as flow value = Parameter value is even = check if even value even = print even value odd = print odd value ifelse is even even odd flow run value=5 flow run value=4 ``` My ideal output should be the following with TaskRunner logs omitted what can i do to achieve that ```5 is even 4 is even```

Jenny · Answer

Let me know if you ve any other questions

Jenny · Answer

Thanks for the extra info You can change the default logging level using prefect config logging level there s more info on that here <https docs prefect io core concepts logging html logging configuration|https docs prefect io core concepts logging html logging configuration>

DiffyBron · Answer

The default logger is INFO and i totally want to filter it off How can i do that that link didn t seem to show us how to do that

DiffyBron · Answer

I m seeing this ``` 2019 12 08 15 05 46 055 INFO prefect FlowRunner | Beginning Flow run for Check even or odd 2019 12 08 15 05 46 056 INFO prefect FlowRunner | Starting flow run 2019 12 08 15 05 46 062 INFO prefect TaskRunner | Task value Starting task run 2019 12 08 15 05 46 064 INFO prefect TaskRunner | Task value finished task run for task with final state Success 2019 12 08 15 05 46 070 INFO prefect TaskRunner | Task check if even Starting task run 2019 12 08 15 05 46 072 INFO prefect TaskRunner | Task check if even finished task run for task with final state Success 2019 12 08 15 05 46 078 INFO prefect TaskRunner | Task CompareValue False Starting task run 2019 12 08 15 05 46 080 INFO prefect TaskRunner | Task CompareValue False finished task run for task with final state Success 5 is even```

Jeremiah · Answer

Hi < DiffyBron> all Prefect log classes inherit from a prefect root logger so you can configure the root logger individually by adding the following to the beginning of your script

Jeremiah · Answer

```import logging logging getLogger prefect setLevel 0 ```

Jeremiah · Answer

This should result in the output

DiffyBron · Answer

Wow perfect Jeremiah Thank you

Jeremiah · Answer

No problem the config setting < Jenny> supplied should have the same effect I m just manually toggling the root setting so I ll check to see how we can better streamline that

DiffyBron · Answer

that s strange i was trying to do the following it didn t work for me so i asked again ```import os os environ PREFECT LOGGING LEVEL = WARNING ```

Jeremiah · Answer

Though I haven t tried setting `os environ` directly I d expect that to work as long as you imported Prefect for the first time after that assignment

Jeremiah · Answer

I ll look into it

Chris White · Answer

My understanding of setting environment variables through the os module directly is that it only will have an effect on child sub processes

Jeremiah · Answer

I agree but I believe Core checks the presence of env vars in the `os environ` dict so I would have thought that subsequent imports would work

Jenny · Answer

Thanks Jeremiah DiffyBron I think Jeremiah answered your question but if you want to set your config you can use a a user configuration file lt https docs prefect io core concepts configuration html environment variables gt or set it as an environment variable ```export PREFECT LOGGING LEVEL= WARNING ``` should work

DiffyBron · Answer

Thanks Jenny I ve tried setting the environment variables within my IDE environment and that worked too Only thing that didn t work was the setting of environment variable with `os environment`

Jenny · Answer

Thanks to Chris for his hint I tried changing the os environ before importing prefect and that seems to work

DiffyBron · Answer

now that s interesting it worked only when you put it at the top of the code just right after the import statement