# Logging
cur_flname = os.path.splitext(os.path.basename(__file__))[0]
LOG_FILENAME = constants.log_dir + os.sep + 'Log_' + cur_flname + '.txt'
util.make_dir_if_missing(constants.log_dir)
logging.basicConfig(filename=LOG_FILENAME, level=logging.INFO, filemode='w',
                    format='%(asctime)s %(levelname)s %(module)s - %(funcName)s: %(message)s',
                    datefmt="%m-%d %H:%M")  # Logging levels are DEBUG, INFO, WARNING, ERROR, and CRITICAL
# Output to screen
logger = logging.getLogger(cur_flname)
logger.addHandler(logging.StreamHandler())

最佳答案

从您的问题很明显，您创建记录器名称没有问题，
日志文件名并记录到文件，所以我将简化这部分以保持我的代码简洁。

第一件事:对我来说，你的解决方案似乎是正确的 logging.StreamHandler将
将输出发送到 sys.stderr默认情况下。你可能有一些代码(不是
显示在您的问题中)，它正在修改 sys.stderr ，或者你正在运行
你在 OSX 上的代码以这样的方式输出到 stderr 没有显示(但
真正输出)。

使用 logging 的解决方案

将以下代码放入with_logging.py :

import logging
import sys

logformat = "%(asctime)s %(levelname)s %(module)s - %(funcName)s: %(message)s"
datefmt = "%m-%d %H:%M"

logging.basicConfig(filename="app.log", level=logging.INFO, filemode="w",
                    format=logformat, datefmt=datefmt)

stream_handler = logging.StreamHandler(sys.stderr)
stream_handler.setFormatter(logging.Formatter(fmt=logformat, datefmt=datefmt))

logger = logging.getLogger("app")
logger.addHandler(stream_handler)

logger.info("information")
logger.warning("warning")


def fun():
    logger.info(" fun inf")
    logger.warning("fun warn")

if __name__ == "__main__":
    fun()

import logbook
import sys

logformat = ("{record.time:%m-%d %H:%M} {record.level_name} {record.module} - "
             "{record.func_name}: {record.message}")
kwargs = {"level": logbook.INFO, "format_string": logformat, "bubble": True}

logbook.StreamHandler(sys.stderr, **kwargs).push_application()
logbook.FileHandler("app.log", **kwargs).push_application()

logger = logbook.Logger("app")

logger.info("information")
logger.warning("warning")


def fun():
    logger.info(" fun inf")
    logger.warning("fun warn")

if __name__ == "__main__":
    fun()

from logbook import Logger

log = Logger(__name__)

log.info("information")
log.warning("warning")


def fun():
    log.info(" fun inf")
    log.warning("fun warn")

import sys
import logbook

if __name__ == "__main__":
    logformat = ("{record.time:%m-%d %H:%M} {record.level_name} {record.module}"
                 "- {record.func_name}: {record.message}")
    kwargs = {"level": logbook.INFO, "format_string": logformat, "bubble": True}

    logbook.StreamHandler(sys.stderr, **kwargs).push_application()
    logbook.FileHandler("app.log", **kwargs).push_application()

    from funmodule import fun
    fun()

import logging

log = logging.getLogger(__name__)

log.info("information")
log.warning("warning")


def fun():
    log.info(" fun inf")
    log.warning("fun warn")
    log.error("no fun at all")

import sys
import logging

if __name__ == "__main__":
    logformat = "%(asctime)s %(levelname)s %(module)s - %(funcName)s: %(message)s"
    datefmt = "%m-%d %H:%M"

    logging.basicConfig(filename="app.log", level=logging.INFO, filemode="w",
                        format=logformat, datefmt=datefmt)

    stream_handler = logging.StreamHandler(sys.stderr)
    stream_handler.setFormatter(logging.Formatter(fmt=logformat, datefmt=datefmt))

    logger = logging.getLogger("funmodule_logging")
    logger.addHandler(stream_handler)

    from funmodule_logging import fun
    fun()

关于Python 日志记录适用于 Windows，但不适用于 Mac OS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36046004/