logging-format-interpolation / W1202#
Message emitted:
Use %s formatting in logging functions
Description:
Used when a logging statement has a call form of "logging.<logging method>(format_string.format(format_args...))". Use another type of string formatting instead. You can use % formatting but leave interpolation to the logging function by passing the parameters as arguments. If logging-fstring-interpolation is disabled then you can use fstring formatting. If logging-not-lazy is disabled then you can use % formatting as normal.
Problematic code:
import logging
import sys
logging.error('Python version: {}'.format(sys.version)) # [logging-format-interpolation]
Correct code:
import logging
import sys
logging.error('Python version: %s', sys.version)
Additional details:
Another reasonable option is to use f-string. If you want to do that, you need to enable
logging-format-interpolation
and disable logging-fstring-interpolation
.
Related links:
Created by the logging checker.