I am using Python 3.8.10. I am trying to use the logging style '{'. From the documentation under formatters It states the following If the style is ‘%’, the message format string uses %()s styled string substitution; the possible keys are documented in LogRecord attributes. If the style is ‘{‘, the message format string is assumed to be compatible with str.format() (using keyword arguments), while if the style is ‘$’ then the message format string should conform to what is expected by string.Template.substitute(). I am having a problem getting style='{' to work correctly. Specifically passing the keyword arguments it needs per the docs. import logging logger = logging.getLogger(__name__) formatter = logging.Formatter('{asctime} - {name} - {levelname} - {message}',style='{') scrnhandler = logging.StreamHandler() scrnhandler.setLevel(logging.INFO) scrnhandler.setFormatter(formatter) logger.addHandler(scrnhandler) logger.level = logging.INFO logger.info("plain message as base case") #<-- Works, no args passed mystr = "Input args: {0:f}".format(10) #<-- This is supposed to be str.format this is to be followed logger.info("Input args: {0:f}", 10) #<-- Does not work, I assume it wants a 'named argument' logger.info("Input args: {args[0]:f}", 10) #<-- Does not work, # I know the data goes into the LogRecord args attribute so tried that logger.info("Input args: {a:f}", a=10) #<-- Does not work, is looking for more args to parse I have not been able to find an example that shows how to use logging following this style, can someone help me figure out the nuance that am I missing to use this style of logging? Continue reading...
