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
我遇到的麻烦是正确设置格式化程序:
class ColouredFormatter(logging.Formatter):
def __init__(self, msg):
logging.Formatter.__init__(self, msg)
self._init_colour = _get_colour()
def close(self):
# restore the colour information to what it was
_set_colour(self._init_colour)
def format(self, record):
# Add your own colourer based on the other examples
_set_colour( LOG_LEVEL_COLOUR[record.levelno] )
return logging.Formatter.format(self, record)
def init():
# Set up the formatter. Needs to be first thing done.
rootLogger = logging.getLogger()
hdlr = logging.StreamHandler()
fmt = ColouredFormatter('%(message)s')
hdlr.setFormatter(fmt)
rootLogger.addHandler(hdlr)
然后使用:
import coloured_log
import logging
coloured_log.init()
logging.info("info")
logging.debug("debug")
coloured_log.close() # restore colours
其他回答
虽然其他解决方案看起来不错，但它们存在一些问题。有些人会给整条线上色，有时这是不需要的，有些人会省略你可能在一起的任何配置。下面的解决方案只影响消息本身。
Code
class ColoredFormatter(logging.Formatter):
def format(self, record):
if record.levelno == logging.WARNING:
record.msg = '\033[93m%s\033[0m' % record.msg
elif record.levelno == logging.ERROR:
record.msg = '\033[91m%s\033[0m' % record.msg
return logging.Formatter.format(self, record)
例子
logger = logging.getLogger('mylogger')
handler = logging.StreamHandler()
log_format = '[%(asctime)s]:%(levelname)-7s:%(message)s'
time_format = '%H:%M:%S'
formatter = ColoredFormatter(log_format, datefmt=time_format)
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.warn('this should be yellow')
logger.error('this should be red')
输出
[17:01:36]:WARNING:this should be yellow
[17:01:37]:ERROR :this should be red
如您所见，其他所有内容仍然输出并保持初始颜色。如果您想要更改消息以外的任何内容，您可以简单地将颜色代码传递给示例中的log_format。
我遇到的麻烦是正确设置格式化程序:
class ColouredFormatter(logging.Formatter):
def __init__(self, msg):
logging.Formatter.__init__(self, msg)
self._init_colour = _get_colour()
def close(self):
# restore the colour information to what it was
_set_colour(self._init_colour)
def format(self, record):
# Add your own colourer based on the other examples
_set_colour( LOG_LEVEL_COLOUR[record.levelno] )
return logging.Formatter.format(self, record)
def init():
# Set up the formatter. Needs to be first thing done.
rootLogger = logging.getLogger()
hdlr = logging.StreamHandler()
fmt = ColouredFormatter('%(message)s')
hdlr.setFormatter(fmt)
rootLogger.addHandler(hdlr)
然后使用:
import coloured_log
import logging
coloured_log.init()
logging.info("info")
logging.debug("debug")
coloured_log.close() # restore colours
更新:因为这是我长久以来一直想要解决的问题，所以我为像我这样只想用简单方法做事的懒人写了一个库:zenlog
Colorlog在这方面非常出色。它在PyPI上可用(因此可以通过pip install colorlog进行安装)，并且是主动维护的。
下面是一个快速复制粘贴代码片段，用于设置日志记录和打印像样的日志消息:
import logging
LOG_LEVEL = logging.DEBUG
LOGFORMAT = " %(log_color)s%(levelname)-8s%(reset)s | %(log_color)s%(message)s%(reset)s"
from colorlog import ColoredFormatter
logging.root.setLevel(LOG_LEVEL)
formatter = ColoredFormatter(LOGFORMAT)
stream = logging.StreamHandler()
stream.setLevel(LOG_LEVEL)
stream.setFormatter(formatter)
log = logging.getLogger('pythonConfig')
log.setLevel(LOG_LEVEL)
log.addHandler(stream)
log.debug("A quirky message only developers care about")
log.info("Curious users might want to know this")
log.warn("Something is wrong and any user should be informed")
log.error("Serious stuff, this is red for a reason")
log.critical("OH NO everything is on fire")
输出:
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
一个方便的带有tput颜色的bash脚本
# Simple using tput
bold=$(tput bold)
reset=$(tput sgr0)
fblack=$(tput setaf 0)
fred=$(tput setaf 1)
fgreen=$(tput setaf 2)
fyellow=$(tput setaf 3)
fblue=$(tput setaf 4)
fmagenta=$(tput setaf 5)
fcyan=$(tput setaf 6)
fwhite=$(tput setaf 7)
fnotused=$(tput setaf 8)
freset=$(tput setaf 9)
bblack=$(tput setab 0)
bred=$(tput setab 1)
bgreen=$(tput setab 2)
byellow=$(tput setab 3)
bblue=$(tput setab 4)
bmagenta=$(tput setab 5)
bcyan=$(tput setab 6)
bwhite=$(tput setab 7)
bnotused=$(tput setab 8)
breset=$(tput setab 9)
# 0 - Emergency (emerg) $fred # something is wrong... go red
# 1 - Alerts (alert) $fred # something is wrong... go red
# 2 - Critical (crit) $fred # something is wrong... go red
# 3 - Errors (err) $fred # something is wrong... go red
# 4 - Warnings (warn) $fyellow # yellow yellow dirty logs
# 5 - Notification (notice) $fwhite # common stuff
# 6 - Information (info) $fblue # sky is blue
# 7 - Debug (debug) $fgreen # lot of stuff to read... go green
