infinite loop

[melassa]

I have a long python file (1800 lines) which send Ruff in infinite loop.
After a trial error session, i reduced the problem to 2 configuration options: PLE and UP. If I exclude them in .toml Ruff works well with that python file.

Some suggestion?

[JonathanPlasse]

Can you share the file or a minimal reproducible example?

[melassa]

No I can't. But I accept suggestion about reducing code to "minimal reproducible example". For example, can I activate a log in Ruff to see where it stops? (I'm a new Ruff user, started to use it just yesterday). I can add that pylint works well with the same python file (PLE == pylint).

[melassa]

Sorry, ss I said is a 1800 lines files for internal use, I can't share it.
I can add that i do not see ANY output from Ruff when I start it with the file. I must stop Ruff with control-c from command prompt under window.
I repeat: there is a debug mode or a log mode to be activated in Ruff?

[melassa]

I can try to delete some code from the script until Ruff works, but it is not a fast work. :-)

[MichaReiser]

You can try to do a binary search to speed this up.

• Comment out one half the lines
• Test if ruff runs fine
  • No: Uncomment the lines. Try commenting the other half of the lines
  • Yes: Leave the lines commented, Repeat process with the remaining lines

[melassa]

I'll try. ASAP

[melassa]

Found the problem for PLE: is a really complex f-string. Now i try to reduce it to minimal example.

[melassa]

Well, this is a minimal example: paste this f-string as is in an empty file and ruff will not return. The configuration is:

[tool.ruff]
select = ["PLE"]

f"""

{x.join("'%s'"
for f in v())}

{a}

{x.join("'%s' _%s" % (s,s) for s in t)}

"""

[MichaReiser]

Awesome. Thank you so much for taking the time to create a minimal reproducible example.

[melassa]

Thank to all developers for Ruff!

[konstin]

i unfortunately can't reproduce this:

code.py:

f"""

    {x.join("'%s'"
    for f in v())}

    {a}

    {x.join("'%s' _%s" % (s,s) for s in t)}
"""

$ ruff --version
ruff 0.0.265
$ ruff --no-cache --select PLE --select UP code.py 
code.py:8:13: UP031 [*] Use format specifiers instead of percent format
Found 1 error.
[*] 1 potentially fixable with the --fix option.

this is how the code looks like for me, could you please confirm that this is the right indentation and newlines?

[melassa]

It seems the same to me. I tryed with your config options and Ruff does not return. The version is the same. My system is Windows.
Here a snippet: https://goonlinetools.com/snapshot/code/#6toc39a4cfcy6g731yqx78

[melassa]

A note: also spaces and empty lines are important. Do not change them .

[melassa]

Same result with this configuration:

[tool.ruff]
select = ["UP"]