安装colorlog包，你可以立即在你的日志消息中使用颜色:

获取一个记录器实例，就像您通常所做的那样。 设置日志级别。您也可以使用像DEBUG这样的常量 和INFO从日志模块直接。 将消息格式化程序设置为所提供的ColoredFormatter 通过colorlog库。

import colorlog

logger = colorlog.getLogger()
logger.setLevel(colorlog.colorlog.logging.DEBUG)

handler = colorlog.StreamHandler()
handler.setFormatter(colorlog.ColoredFormatter())
logger.addHandler(handler)

logger.debug("Debug message")
logger.info("Information message")
logger.warning("Warning message")
logger.error("Error message")
logger.critical("Critical message")

输出:

更新:额外信息

只需更新ColoredFormatter:

handler.setFormatter(colorlog.ColoredFormatter('%(log_color)s [%(asctime)s] %(levelname)s [%(filename)s.%(funcName)s:%(lineno)d] %(message)s', datefmt='%a, %d %b %Y %H:%M:%S'))

输出:

包:

pip install colorlog

输出:

Collecting colorlog
  Downloading colorlog-4.6.2-py2.py3-none-any.whl (10.0 kB)
Installing collected packages: colorlog
Successfully installed colorlog-4.6.2

我修改了Sorin提供的原始示例，并将StreamHandler子类化为ColorizedConsoleHandler。

他们的解决方案的缺点是它修改了消息，并且因为修改了实际的日志消息，任何其他处理程序也将得到修改后的消息。

在我们的例子中，这导致日志文件中有颜色代码，因为我们使用了多个记录器。

下面的类只在支持ANSI的平台上工作，但是向它添加Windows颜色代码应该很简单。

import copy
import logging


class ColoredConsoleHandler(logging.StreamHandler):
    def emit(self, record):
        # Need to make a actual copy of the record
        # to prevent altering the message for other loggers
        myrecord = copy.copy(record)
        levelno = myrecord.levelno
        if(levelno >= 50):  # CRITICAL / FATAL
            color = '\x1b[31m'  # red
        elif(levelno >= 40):  # ERROR
            color = '\x1b[31m'  # red
        elif(levelno >= 30):  # WARNING
            color = '\x1b[33m'  # yellow
        elif(levelno >= 20):  # INFO
            color = '\x1b[32m'  # green
        elif(levelno >= 10):  # DEBUG
            color = '\x1b[35m'  # pink
        else:  # NOTSET and anything else
            color = '\x1b[0m'  # normal
        myrecord.msg = color + str(myrecord.msg) + '\x1b[0m'  # normal
        logging.StreamHandler.emit(self, myrecord)

使用龙卷风库

Tornado web框架提供了一些实用程序，包括Tornado .log. logformatter格式化程序，它可以在没有框架其他部分的情况下使用。

对不支持ANSI颜色代码的Windows版本的颜色支持是通过使用colorama库启用的。希望使用它的应用程序必须首先调用colorama.init来初始化colorama。

import logging
import tornado.log
# import colorama  # uncomment on some Windows versions
# colorama.init()

consoleHandler = logging.StreamHandler()
consoleHandler.setFormatter(tornado.log.LogFormatter())
logging.basicConfig(level=logging.DEBUG, handlers=[consoleHandler])
logger = logging.getLogger("test")
logger.info("hello world")

这是一个包含颜色代码的Enum:

class TerminalColour:
    """
    Terminal colour formatting codes
    """
    # https://stackoverflow.com/questions/287871/print-in-terminal-with-colors
    MAGENTA = '\033[95m'
    BLUE = '\033[94m'
    GREEN = '\033[92m'
    YELLOW = '\033[93m'
    RED = '\033[91m'
    GREY = '\033[0m'  # normal
    WHITE = '\033[1m'  # bright white
    UNDERLINE = '\033[4m'

这可以应用于每个日志级别的名称。请注意，这是一个可怕的黑客。

logging.addLevelName(logging.INFO, "{}{}{}".format(TerminalColour.WHITE, logging.getLevelName(logging.INFO), TerminalColour.GREY))
logging.addLevelName(logging.WARNING, "{}{}{}".format(TerminalColour.YELLOW, logging.getLevelName(logging.WARNING), TerminalColour.GREY))
logging.addLevelName(logging.ERROR, "{}{}{}".format(TerminalColour.RED, logging.getLevelName(logging.ERROR), TerminalColour.GREY))
logging.addLevelName(logging.CRITICAL, "{}{}{}".format(TerminalColour.MAGENTA, logging.getLevelName(logging.CRITICAL), .GREY))

注意，您的日志格式化程序必须包含日志级别的名称

%(levelname)

例如:

    LOGGING = {
...
        'verbose': {
            'format': '%(asctime)s %(levelname)s %(name)s:%(lineno)s %(module)s %(process)d %(thread)d %(message)s'
        },
        'simple': {
            'format': '[%(asctime)s] %(levelname)s %(name)s %(message)s'
        },

有很多回复。但没有人谈论装修师。这是我的。

因为它要简单得多。

不需要导入任何东西，也不需要编写任何子类:

#!/usr/bin/env python
# -*- coding: utf-8 -*-


import logging


NO_COLOR = "\33[m"
RED, GREEN, ORANGE, BLUE, PURPLE, LBLUE, GREY = \
    map("\33[%dm".__mod__, range(31, 38))

logging.basicConfig(format="%(message)s", level=logging.DEBUG)
logger = logging.getLogger(__name__)

# the decorator to apply on the logger methods info, warn, ...
def add_color(logger_method, color):
  def wrapper(message, *args, **kwargs):
    return logger_method(
      # the coloring is applied here.
      color+message+NO_COLOR,
      *args, **kwargs
    )
  return wrapper

for level, color in zip((
  "info", "warn", "error", "debug"), (
  GREEN, ORANGE, RED, BLUE
)):
  setattr(logger, level, add_color(getattr(logger, level), color))

# this is displayed in red.
logger.error("Launching %s." % __file__)

这将错误设置为红色，调试消息设置为蓝色，等等。就像问题中问的那样。

我们甚至可以使用logger.debug("message"， color=GREY)使包装器接受一个颜色参数来动态设置消息的颜色。

编辑: 这里是在运行时设置颜色的修饰器:

def add_color(logger_method, _color):
  def wrapper(message, *args, **kwargs):
    color = kwargs.pop("color", _color)
    if isinstance(color, int):
      color = "\33[%dm" % color
    return logger_method(
      # the coloring is applied here.
      color+message+NO_COLOR,
      *args, **kwargs
    )
  return wrapper

# blah blah, apply the decorator...

# this is displayed in red.
logger.error("Launching %s." % __file__)
# this is displayed in blue
logger.error("Launching %s." % __file__, color=34)
# and this, in grey
logger.error("Launching %s." % __file__, color=GREY)

下面是一个适用于任何平台的解决方案。如果没有，告诉我，我会更新的。

它是如何工作的:在支持ANSI转义的平台上使用它们(非Windows)，在Windows上它确实使用API调用来改变控制台颜色。

该脚本确实破解了标准库中的logging.StreamHandler.emit方法，并向其添加了包装器。

TestColorer.py

# Usage: add Colorer.py near you script and import it.
import logging
import Colorer

logging.warn("a warning")
logging.error("some error")
logging.info("some info")

Colorer.py

#!/usr/bin/env python
# encoding: utf-8
import logging
# now we patch Python code to add color support to logging.StreamHandler
def add_coloring_to_emit_windows(fn):
        # add methods we need to the class
    def _out_handle(self):
        import ctypes
        return ctypes.windll.kernel32.GetStdHandle(self.STD_OUTPUT_HANDLE)
    out_handle = property(_out_handle)

    def _set_color(self, code):
        import ctypes
        # Constants from the Windows API
        self.STD_OUTPUT_HANDLE = -11
        hdl = ctypes.windll.kernel32.GetStdHandle(self.STD_OUTPUT_HANDLE)
        ctypes.windll.kernel32.SetConsoleTextAttribute(hdl, code)

    setattr(logging.StreamHandler, '_set_color', _set_color)

    def new(*args):
        FOREGROUND_BLUE      = 0x0001 # text color contains blue.
        FOREGROUND_GREEN     = 0x0002 # text color contains green.
        FOREGROUND_RED       = 0x0004 # text color contains red.
        FOREGROUND_INTENSITY = 0x0008 # text color is intensified.
        FOREGROUND_WHITE     = FOREGROUND_BLUE|FOREGROUND_GREEN |FOREGROUND_RED
       # winbase.h
        STD_INPUT_HANDLE = -10
        STD_OUTPUT_HANDLE = -11
        STD_ERROR_HANDLE = -12

        # wincon.h
        FOREGROUND_BLACK     = 0x0000
        FOREGROUND_BLUE      = 0x0001
        FOREGROUND_GREEN     = 0x0002
        FOREGROUND_CYAN      = 0x0003
        FOREGROUND_RED       = 0x0004
        FOREGROUND_MAGENTA   = 0x0005
        FOREGROUND_YELLOW    = 0x0006
        FOREGROUND_GREY      = 0x0007
        FOREGROUND_INTENSITY = 0x0008 # foreground color is intensified.

        BACKGROUND_BLACK     = 0x0000
        BACKGROUND_BLUE      = 0x0010
        BACKGROUND_GREEN     = 0x0020
        BACKGROUND_CYAN      = 0x0030
        BACKGROUND_RED       = 0x0040
        BACKGROUND_MAGENTA   = 0x0050
        BACKGROUND_YELLOW    = 0x0060
        BACKGROUND_GREY      = 0x0070
        BACKGROUND_INTENSITY = 0x0080 # background color is intensified.     

        levelno = args[1].levelno
        if(levelno>=50):
            color = BACKGROUND_YELLOW | FOREGROUND_RED | FOREGROUND_INTENSITY | BACKGROUND_INTENSITY 
        elif(levelno>=40):
            color = FOREGROUND_RED | FOREGROUND_INTENSITY
        elif(levelno>=30):
            color = FOREGROUND_YELLOW | FOREGROUND_INTENSITY
        elif(levelno>=20):
            color = FOREGROUND_GREEN
        elif(levelno>=10):
            color = FOREGROUND_MAGENTA
        else:
            color =  FOREGROUND_WHITE
        args[0]._set_color(color)

        ret = fn(*args)
        args[0]._set_color( FOREGROUND_WHITE )
        #print "after"
        return ret
    return new

def add_coloring_to_emit_ansi(fn):
    # add methods we need to the class
    def new(*args):
        levelno = args[1].levelno
        if(levelno>=50):
            color = '\x1b[31m' # red
        elif(levelno>=40):
            color = '\x1b[31m' # red
        elif(levelno>=30):
            color = '\x1b[33m' # yellow
        elif(levelno>=20):
            color = '\x1b[32m' # green 
        elif(levelno>=10):
            color = '\x1b[35m' # pink
        else:
            color = '\x1b[0m' # normal
        args[1].msg = color + args[1].msg +  '\x1b[0m'  # normal
        #print "after"
        return fn(*args)
    return new

import platform
if platform.system()=='Windows':
    # Windows does not support ANSI escapes and we are using API calls to set the console color
    logging.StreamHandler.emit = add_coloring_to_emit_windows(logging.StreamHandler.emit)
else:
    # all non-Windows platforms are supporting ANSI escapes so we use them
    logging.StreamHandler.emit = add_coloring_to_emit_ansi(logging.StreamHandler.emit)
    #log = logging.getLogger()
    #log.addFilter(log_filter())
    #//hdlr = logging.StreamHandler()
    #//hdlr.setFormatter(formatter())