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'
        },

好吧，我想我应该加上我的彩色记录器的变化。

这没什么特别的，但是使用起来非常简单，并且不会更改记录对象，因此如果使用文件处理程序，就可以避免将ANSI转义序列记录到日志文件中。不影响日志信息的格式化。

如果你已经在使用日志记录模块的Formatter，你所要做的就是用ColoredFormatter替换忠告处理程序Formatter来获得有颜色的级别名称。如果你正在记录整个应用程序，你只需要为顶级记录器这样做。

colored_log.py

#!/usr/bin/env python

from copy import copy
from logging import Formatter

MAPPING = {
    'DEBUG'   : 37, # white
    'INFO'    : 36, # cyan
    'WARNING' : 33, # yellow
    'ERROR'   : 31, # red
    'CRITICAL': 41, # white on red bg
}

PREFIX = '\033['
SUFFIX = '\033[0m'

class ColoredFormatter(Formatter):

    def __init__(self, patern):
        Formatter.__init__(self, patern)

    def format(self, record):
        colored_record = copy(record)
        levelname = colored_record.levelname
        seq = MAPPING.get(levelname, 37) # default white
        colored_levelname = ('{0}{1}m{2}{3}') \
            .format(PREFIX, seq, levelname, SUFFIX)
        colored_record.levelname = colored_levelname
        return Formatter.format(self, colored_record)

示例使用

app.py

#!/usr/bin/env python

import logging
from colored_log import ColoredFormatter

# Create top level logger
log = logging.getLogger("main")

# Add console handler using our custom ColoredFormatter
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
cf = ColoredFormatter("[%(name)s][%(levelname)s]  %(message)s (%(filename)s:%(lineno)d)")
ch.setFormatter(cf)
log.addHandler(ch)

# Add file handler
fh = logging.FileHandler('app.log')
fh.setLevel(logging.DEBUG)
ff = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
fh.setFormatter(ff)
log.addHandler(fh)

# Set log level
log.setLevel(logging.DEBUG)

# Log some stuff
log.debug("app has started")
log.info("Logging to 'app.log' in the script dir")
log.warning("This is my last warning, take heed")
log.error("This is an error")
log.critical("He's dead, Jim")

# Import a sub-module 
import sub_module

sub_module.py

#!/usr/bin/env python

import logging
log = logging.getLogger('main.sub_module')

log.debug("Hello from the sub module")

结果

终端输出

app.log内容

2017-09-29 00:32:23,434 - main - DEBUG - app has started
2017-09-29 00:32:23,434 - main - INFO - Logging to 'app.log' in the script dir
2017-09-29 00:32:23,435 - main - WARNING - This is my last warning, take heed
2017-09-29 00:32:23,435 - main - ERROR - This is an error
2017-09-29 00:32:23,435 - main - CRITICAL - He's dead, Jim
2017-09-29 00:32:23,435 - main.sub_module - DEBUG - Hello from the sub module

当然，您可以随心所欲地设置终端和日志文件输出的格式。只有日志级别将被着色。

我希望有人发现这是有用的，而不是只是太多的相同。：）

Python示例文件可以从这个GitHub Gist下载: https://gist.github.com/KurtJacobson/48e750701acec40c7161b5a2f79e6bfd

airmind的另一种方法是将所有东西都放在一个类中:

class ColorFormatter(logging.Formatter):
  FORMAT = ("[$BOLD%(name)-20s$RESET][%(levelname)-18s]  "
            "%(message)s "
            "($BOLD%(filename)s$RESET:%(lineno)d)")

  BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)

  RESET_SEQ = "\033[0m"
  COLOR_SEQ = "\033[1;%dm"
  BOLD_SEQ = "\033[1m"

  COLORS = {
    'WARNING': YELLOW,
    'INFO': WHITE,
    'DEBUG': BLUE,
    'CRITICAL': YELLOW,
    'ERROR': RED
  }

  def formatter_msg(self, msg, use_color = True):
    if use_color:
      msg = msg.replace("$RESET", self.RESET_SEQ).replace("$BOLD", self.BOLD_SEQ)
    else:
      msg = msg.replace("$RESET", "").replace("$BOLD", "")
    return msg

  def __init__(self, use_color=True):
    msg = self.formatter_msg(self.FORMAT, use_color)
    logging.Formatter.__init__(self, msg)
    self.use_color = use_color

  def format(self, record):
    levelname = record.levelname
    if self.use_color and levelname in self.COLORS:
      fore_color = 30 + self.COLORS[levelname]
      levelname_color = self.COLOR_SEQ % fore_color + levelname + self.RESET_SEQ
      record.levelname = levelname_color
    return logging.Formatter.format(self, record)

要使用将格式化程序附加到处理程序，如下所示:

handler.setFormatter(ColorFormatter())
logger.addHandler(handler)

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。

这是airmind示例的另一个Python3变体。我想要一些在其他例子中没有看到的特性

为终端使用颜色，但不要在文件处理程序中写入不可打印的字符(我为此定义了2个格式化器) 能够覆盖特定日志消息的颜色 从一个文件(在本例中是yaml)配置记录器

注意:我使用了colorama，但是你可以修改它，这样就不需要了。对于我的测试，我只是运行python文件，所以我的类在模块__main__中。你必须更改():__main__。ColoredFormatter到你的模块。

pip install colorama pyyaml

logging.yaml

---
version: 1
disable_existing_loggers: False
formatters:
  simple:
    format: "%(threadName)s - %(name)s - %(levelname)s - %(message)s"
  color:
    format: "%(threadName)s - %(name)s - %(levelname)s - %(message)s"
    (): __main__.ColoredFormatter
    use_color: true

handlers:
  console:
    class: logging.StreamHandler
    level: DEBUG
    formatter: color
    stream: ext://sys.stdout

  info_file_handler:
    class: logging.handlers.RotatingFileHandler
    level: INFO
    formatter: simple
    filename: app.log
    maxBytes: 20971520 
    backupCount: 20
    encoding: utf8

  error_file_handler:
    class: logging.handlers.RotatingFileHandler
    level: ERROR
    formatter: simple
    filename: errors.log
    maxBytes: 10485760 
    backupCount: 20
    encoding: utf8

root:
  level: DEBUG
  handlers: [console, info_file_handler, error_file_handler]

main.py

import logging
import logging.config
import os
from logging import Logger

import colorama
import yaml
from colorama import Back, Fore, Style

COLORS = {
    "WARNING": Fore.YELLOW,
    "INFO": Fore.CYAN,
    "DEBUG": Fore.BLUE,
    "CRITICAL": Fore.YELLOW,
    "ERROR": Fore.RED,
}


class ColoredFormatter(logging.Formatter):
    def __init__(self, *, format, use_color):
        logging.Formatter.__init__(self, fmt=format)
        self.use_color = use_color

    def format(self, record):
        msg = super().format(record)
        if self.use_color:
            levelname = record.levelname
            if hasattr(record, "color"):
                return f"{record.color}{msg}{Style.RESET_ALL}"
            if levelname in COLORS:
                return f"{COLORS[levelname]}{msg}{Style.RESET_ALL}"
        return msg


with open("logging.yaml", "rt") as f:
    config = yaml.safe_load(f.read())
    logging.config.dictConfig(config)

logger: Logger = logging.getLogger(__name__)
logger.info("Test INFO", extra={"color": Back.RED})
logger.info("Test INFO", extra={"color": f"{Style.BRIGHT}{Back.RED}"})
logger.info("Test INFO")
logger.debug("Test DEBUG")
logger.warning("Test WARN")

输出:

使用pyfancy。

例子:

print(pyfancy.RED + "Hello Red!" + pyfancy.END)