Seek support in logging hooks

First of all; I really like this project. It makes creating nice looking progress bars a breeze compared to other solutions that I’ve tried in the past. Nice work!

Today I ran into an issue related to loggers after upgrading to 2.0.0. I’m using a RotatingFileHandler and don’t disable existing loggers, which seems to cause issues with the internal logging in alive-progress. The following small example can be used to reproduce the issue that I’m seeing

from alive_progress import alive_bar
import logging
from logging.config import dictConfig

config = {
    "version": 1,
    "disable_existing_loggers": False,    # This causes the error
    "handlers": {"logfile": {
       "class": "logging.handlers.RotatingFileHandler",
        "filename": f"test.log",
        "maxBytes": 1000
        }
    },
    "root": {"level": "DEBUG", "handlers": ["logfile"]},
}

dictConfig(config)
logger = logging.getLogger('simple_example')

n = 1
with alive_bar(total=n) as bar:
    for i in range(n):
        logger.info(f"Currently at {i}")
        bar()

which results in the following error

on 0: --- Logging error ---
Traceback (most recent call last):
  File "/usr/lib/python3.7/logging/handlers.py", line 68, in emit
          if self.shouldRollover(record):
  File "/usr/lib/python3.7/logging/handlers.py", line 185, in shouldRollover
          self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
AttributeError: 'types.SimpleNamespace' object has no attribute 'seek'
Call stack:
  File "test_bar.py", line 23, in <module>
          logger.info(f"Currently at {i}")
Message: 'Currently at 0'
      Arguments: ()

[alexisteleco]

Hi, I agree with @johanjeppsson, this project is great!

I’ve been having this exact same problem too (I’m using RotatingFileHandler) and when I searched for it I discovered that it is solved! 🥳

So my only question is when the next release will be released, I’m using 2.4.1 at the moment (which pip says it’s the newer one) and it is not fixed there. I do not want to put pressure or anything, just wanted to know an approximate date if possible.

Thanks again for this incredible piece of software!

[rsalmei]

This is fixed! Should be available in the next release… 👍