colorlog.basicConfig does not accept '{' style

[skjoedt]

Using colorlog.basicConfig() with style='{' results in an error. It seems that colorlog does not send the style on to logging.

import logging
import colorlog

fmt = '{log_color}{levelname} {name}: {message}'
colorlog.basicConfig(level=logging.DEBUG, style='{', format=fmt, stream=None)

log = logging.getLogger()

log.debug('hello')

Traceback

$ python3 test_log.py 
Traceback (most recent call last):
  File "test_log.py", line 6, in <module>
    colorlog.basicConfig(level=logging.DEBUG, style='{', format=fmt, stream=None)
  File "/home/csh/dev/wm/virt/lib/python3.8/site-packages/colorlog/logging.py", line 16, in basicConfig
    logging.basicConfig(**kwargs)
  File "/toolbox/2/tools/python-3.8.1/lib/python3.8/logging/__init__.py", line 1984, in basicConfig
    fmt = Formatter(fs, dfs, style)
  File "/toolbox/2/tools/python-3.8.1/lib/python3.8/logging/__init__.py", line 576, in __init__
    self._style.validate()
  File "/toolbox/2/tools/python-3.8.1/lib/python3.8/logging/__init__.py", line 429, in validate
    raise ValueError("Invalid format '%s' for '%s' style" % (self._fmt, self.default_format[0]))
ValueError: Invalid format '{log_color}{levelname} {name}: {message}' for '%' style

Using colorlog 4.7.2

[borntyping]

I was quite suprised to find this doesn't work - the bug has been around for a very long time! It resulted from passing some formatting aguments on to the original logging.basicConfig() (format and dateformat) but not others (style).

[borntyping]

Should be fixed in 4.8.0. Thanks!