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
这是@Sergey Pleshakov的出色回答的轻微变化，他只对关卡使用颜色，并像预期的那样使用basicConfig:
class CustomFormatter(logging.Formatter):
white = "\x1b[97;20m"
grey = "\x1b[38;20m"
green = "\x1b[32;20m"
cyan = "\x1b[36;20m"
yellow = "\x1b[33;20m"
red = "\x1b[31;20m"
bold_red = "\x1b[31;1m"
reset = "\x1b[0m"
fmt = "%(asctime)s - {}%(levelname)-8s{} - %(name)s.%(funcName)s - %(message)s"
FORMATS = {
logging.DEBUG: fmt.format(grey, reset),
logging.INFO: fmt.format(green, reset),
logging.WARNING: fmt.format(yellow, reset),
logging.ERROR: fmt.format(red, reset),
logging.CRITICAL: fmt.format(bold_red, reset),
}
def format(self, record):
log_fmt = self.FORMATS.get(record.levelno)
formatter = logging.Formatter(log_fmt, datefmt="%H:%M:%S")
return formatter.format(record)
handler = logging.StreamHandler()
handler.setFormatter(CustomFormatter())
logging.basicConfig(
level=logging.DEBUG,
handlers=[handler]
)
其他回答
使用pyfancy。
例子:
print(pyfancy.RED + "Hello Red!" + pyfancy.END)
这是@Sergey Pleshakov的出色回答的轻微变化，他只对关卡使用颜色，并像预期的那样使用basicConfig:
class CustomFormatter(logging.Formatter):
white = "\x1b[97;20m"
grey = "\x1b[38;20m"
green = "\x1b[32;20m"
cyan = "\x1b[36;20m"
yellow = "\x1b[33;20m"
red = "\x1b[31;20m"
bold_red = "\x1b[31;1m"
reset = "\x1b[0m"
fmt = "%(asctime)s - {}%(levelname)-8s{} - %(name)s.%(funcName)s - %(message)s"
FORMATS = {
logging.DEBUG: fmt.format(grey, reset),
logging.INFO: fmt.format(green, reset),
logging.WARNING: fmt.format(yellow, reset),
logging.ERROR: fmt.format(red, reset),
logging.CRITICAL: fmt.format(bold_red, reset),
}
def format(self, record):
log_fmt = self.FORMATS.get(record.levelno)
formatter = logging.Formatter(log_fmt, datefmt="%H:%M:%S")
return formatter.format(record)
handler = logging.StreamHandler()
handler.setFormatter(CustomFormatter())
logging.basicConfig(
level=logging.DEBUG,
handlers=[handler]
)
简化的日志库:
class handler(logging.StreamHandler):
colors = {
logging.DEBUG: '\033[37m',
logging.INFO: '\033[36m',
logging.WARNING: '\033[33m',
logging.ERROR: '\033[31m',
logging.CRITICAL: '\033[101m',
}
reset = '\033[0m'
fmtr = logging.Formatter('%(levelname)s %(message)s')
def format(self, record):
color = self.colors[record.levelno]
log = self.fmtr.format(record)
reset = self.reset
return color + log + reset
logging.basicConfig(level=logging.DEBUG, handlers=[handler()])
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
以下是我的解决方案:
class ColouredFormatter(logging.Formatter):
RESET = '\x1B[0m'
RED = '\x1B[31m'
YELLOW = '\x1B[33m'
BRGREEN = '\x1B[01;32m' # grey in solarized for terminals
def format(self, record, colour=False):
message = super().format(record)
if not colour:
return message
level_no = record.levelno
if level_no >= logging.CRITICAL:
colour = self.RED
elif level_no >= logging.ERROR:
colour = self.RED
elif level_no >= logging.WARNING:
colour = self.YELLOW
elif level_no >= logging.INFO:
colour = self.RESET
elif level_no >= logging.DEBUG:
colour = self.BRGREEN
else:
colour = self.RESET
message = colour + message + self.RESET
return message
class ColouredHandler(logging.StreamHandler):
def __init__(self, stream=sys.stdout):
super().__init__(stream)
def format(self, record, colour=False):
if not isinstance(self.formatter, ColouredFormatter):
self.formatter = ColouredFormatter()
return self.formatter.format(record, colour)
def emit(self, record):
stream = self.stream
try:
msg = self.format(record, stream.isatty())
stream.write(msg)
stream.write(self.terminator)
self.flush()
except Exception:
self.handleError(record)
h = ColouredHandler()
h.formatter = ColouredFormatter('{asctime} {levelname:8} {message}', '%Y-%m-%d %H:%M:%S', '{')
logging.basicConfig(level=logging.DEBUG, handlers=[h])
