Wie wäre es, zusätzlich zur Einfärbung nach Stufe auch die Argumente der Protokollnachrichten mit wechselnden Farben hervorzuheben? Ich habe kürzlich einfachen Code dafür geschrieben. Ein weiterer Vorteil ist, dass der Log-Aufruf mit der Klammerformatierung von Python 3 gemacht wird. ( "{}" ).
Aktuellen Code und Beispiele finden Sie hier: https://github.com/davidohana/colargulog
Beispiel für Logging-Code:
root_logger = logging.getLogger()
console_handler = logging.StreamHandler(stream=sys.stdout)
console_format = "%(asctime)s - %(levelname)-8s - %(name)-25s - %(message)s"
colored_formatter = ColorizedArgsFormatter(console_format)
console_handler.setFormatter(colored_formatter)
root_logger.addHandler(console_handler)
logger = logging.getLogger(__name__)
logger.info("Hello World")
logger.info("Request from {} handled in {:.3f} ms", socket.gethostname(), 11)
logger.info("Request from {} handled in {:.3f} ms", "127.0.0.1", 33.1)
logger.info("My favorite drinks are {}, {}, {}, {}", "milk", "wine", "tea", "beer")
logger.debug("this is a {} message", logging.getLevelName(logging.DEBUG))
logger.info("this is a {} message", logging.getLevelName(logging.INFO))
logger.warning("this is a {} message", logging.getLevelName(logging.WARNING))
logger.error("this is a {} message", logging.getLevelName(logging.ERROR))
logger.critical("this is a {} message", logging.getLevelName(logging.CRITICAL))
logger.info("Does old-style formatting also work? %s it is, but no colors (yet)", True)
Ausgabe:
![enter image description here]()
Umsetzung:
"""
colargulog - Python3 Logging with Colored Arguments and new string formatting style
Written by david.ohana@ibm.com
License: Apache-2.0
"""
import logging
import logging.handlers
import re
class ColorCodes:
grey = "\x1b[38;21m"
green = "\x1b[1;32m"
yellow = "\x1b[33;21m"
red = "\x1b[31;21m"
bold_red = "\x1b[31;1m"
blue = "\x1b[1;34m"
light_blue = "\x1b[1;36m"
purple = "\x1b[1;35m"
reset = "\x1b[0m"
class ColorizedArgsFormatter(logging.Formatter):
arg_colors = [ColorCodes.purple, ColorCodes.light_blue]
level_fields = ["levelname", "levelno"]
level_to_color = {
logging.DEBUG: ColorCodes.grey,
logging.INFO: ColorCodes.green,
logging.WARNING: ColorCodes.yellow,
logging.ERROR: ColorCodes.red,
logging.CRITICAL: ColorCodes.bold_red,
}
def __init__(self, fmt: str):
super().__init__()
self.level_to_formatter = {}
def add_color_format(level: int):
color = ColorizedArgsFormatter.level_to_color[level]
_format = fmt
for fld in ColorizedArgsFormatter.level_fields:
search = "(%\(" + fld + "\).*?s)"
_format = re.sub(search, f"{color}\\1{ColorCodes.reset}", _format)
formatter = logging.Formatter(_format)
self.level_to_formatter[level] = formatter
add_color_format(logging.DEBUG)
add_color_format(logging.INFO)
add_color_format(logging.WARNING)
add_color_format(logging.ERROR)
add_color_format(logging.CRITICAL)
@staticmethod
def rewrite_record(record: logging.LogRecord):
if not BraceFormatStyleFormatter.is_brace_format_style(record):
return
msg = record.msg
msg = msg.replace("{", "_{{")
msg = msg.replace("}", "_}}")
placeholder_count = 0
# add ANSI escape code for next alternating color before each formatting parameter
# and reset color after it.
while True:
if "_{{" not in msg:
break
color_index = placeholder_count % len(ColorizedArgsFormatter.arg_colors)
color = ColorizedArgsFormatter.arg_colors[color_index]
msg = msg.replace("_{{", color + "{", 1)
msg = msg.replace("_}}", "}" + ColorCodes.reset, 1)
placeholder_count += 1
record.msg = msg.format(*record.args)
record.args = []
def format(self, record):
orig_msg = record.msg
orig_args = record.args
formatter = self.level_to_formatter.get(record.levelno)
self.rewrite_record(record)
formatted = formatter.format(record)
# restore log record to original state for other handlers
record.msg = orig_msg
record.args = orig_args
return formatted
class BraceFormatStyleFormatter(logging.Formatter):
def __init__(self, fmt: str):
super().__init__()
self.formatter = logging.Formatter(fmt)
@staticmethod
def is_brace_format_style(record: logging.LogRecord):
if len(record.args) == 0:
return False
msg = record.msg
if '%' in msg:
return False
count_of_start_param = msg.count("{")
count_of_end_param = msg.count("}")
if count_of_start_param != count_of_end_param:
return False
if count_of_start_param != len(record.args):
return False
return True
@staticmethod
def rewrite_record(record: logging.LogRecord):
if not BraceFormatStyleFormatter.is_brace_format_style(record):
return
record.msg = record.msg.format(*record.args)
record.args = []
def format(self, record):
orig_msg = record.msg
orig_args = record.args
self.rewrite_record(record)
formatted = self.formatter.format(record)
# restore log record to original state for other handlers
record.msg = orig_msg
record.args = orig_args
return formatted
