前段时间，我看到一个Mono应用程序的输出是彩色的，可能是因为它的日志系统(因为所有的消息都是标准化的)。
现在，Python有了日志记录模块，它允许您指定许多选项来定制输出。所以，我想象类似的事情可能与Python，但我不知道如何在任何地方做到这一点。
是否有办法使Python日志模块输出为彩色?
我想要的(例如)错误显示为红色，调试消息显示为蓝色或黄色，等等。
当然，这可能需要一个兼容的终端(大多数现代终端都是);但如果不支持颜色，我可以退回到原始的日志输出。
有什么想法，我可以得到彩色输出与日志模块?
当前回答
FriendlyLog是另一种选择。它适用于Linux、Windows和MacOS下的Python 2和3。
其他回答
FriendlyLog是另一种选择。它适用于Linux、Windows和MacOS下的Python 2和3。
只要你不想去发明轮子。
只需pip安装loguru，然后:
from loguru import logger
if __name__ == '__main__':
message = "Message text"
logger.info(message)
logger.debug(message)
logger.warning(message)
logger.success(message)
logger.error(message)
logger.critical(message)
输出:
您可以更改格式，颜色，写入文件从盒子…这里是文档
请看下面的解决方案。流处理程序应该是做着色的事情，然后你可以选择着色单词而不仅仅是整行(与Formatter)。
http://plumberjack.blogspot.com/2010/12/colorizing-logging-output-in-terminals.html
我更喜欢使用这个片段:
import logging
from enum import Enum
CSI = '\033['
Color = Enum(
'Color', 'BLACK RED GREEN YELLOW BLUE MAGENTA CYAN WHITE', start=30
)
class AnsiColorHandler(logging.StreamHandler):
LOGLEVEL_COLORS = {
'DEBUG': Color.BLUE,
'INFO': Color.GREEN,
'WARNING': Color.RED,
'ERROR': Color.RED,
'CRITICAL': Color.RED,
}
def __init__(self) -> None:
super().__init__()
self.formatter = logging.Formatter("%(levelname)-8s - %(message)s")
def format(self, record: logging.LogRecord) -> str:
message: str = super().format(record)
# use colors in tty
if self.stream.isatty() and (
color := self.LOGLEVEL_COLORS.get(record.levelname)
):
message = f'{CSI}{color.value}m{message}{CSI}0m'
return message
# setup logger
# logger = logging.getLogger(__package__)
logger = logging.getLogger(__name__)
logger.addHandler(AnsiColorHandler())
用法:
import logging
from .log import logger
logger.setLevel(logging.DEBUG)
logger.debug("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
我已经知道了颜色转义，我使用他们在我的bash提示前一段时间。不管怎样,都要谢谢您。 我想要的是将它与日志模块集成在一起，经过几次尝试和错误后，我最终做到了这一点。 这是我最后得出的结论:
BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
#The background is set with 40 plus the number of the color, and the foreground with 30
#These are the sequences need to get colored ouput
RESET_SEQ = "\033[0m"
COLOR_SEQ = "\033[1;%dm"
BOLD_SEQ = "\033[1m"
def formatter_message(message, use_color = True):
if use_color:
message = message.replace("$RESET", RESET_SEQ).replace("$BOLD", BOLD_SEQ)
else:
message = message.replace("$RESET", "").replace("$BOLD", "")
return message
COLORS = {
'WARNING': YELLOW,
'INFO': WHITE,
'DEBUG': BLUE,
'CRITICAL': YELLOW,
'ERROR': RED
}
class ColoredFormatter(logging.Formatter):
def __init__(self, msg, use_color = True):
logging.Formatter.__init__(self, msg)
self.use_color = use_color
def format(self, record):
levelname = record.levelname
if self.use_color and levelname in COLORS:
levelname_color = COLOR_SEQ % (30 + COLORS[levelname]) + levelname + RESET_SEQ
record.levelname = levelname_color
return logging.Formatter.format(self, record)
要使用它，请创建自己的Logger:
# Custom logger class with multiple destinations
class ColoredLogger(logging.Logger):
FORMAT = "[$BOLD%(name)-20s$RESET][%(levelname)-18s] %(message)s ($BOLD%(filename)s$RESET:%(lineno)d)"
COLOR_FORMAT = formatter_message(FORMAT, True)
def __init__(self, name):
logging.Logger.__init__(self, name, logging.DEBUG)
color_formatter = ColoredFormatter(self.COLOR_FORMAT)
console = logging.StreamHandler()
console.setFormatter(color_formatter)
self.addHandler(console)
return
logging.setLoggerClass(ColoredLogger)
以防有人需要。
Be careful if you're using more than one logger or handler: ColoredFormatter is changing the record object, which is passed further to other handlers or propagated to other loggers. If you have configured file loggers etc. you probably don't want to have the colors in the log files. To avoid that, it's probably best to simply create a copy of record with copy.copy() before manipulating the levelname attribute, or to reset the levelname to the previous value, before returning the formatted string (credit to Michael in the comments).
