python日志库loguru使用教程/封装loguru工具类/自定义日志格式化控制台输出和日志写入
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目录
-
- 先看二次封装loguru后的结果如何.
-
- 控制台输出,增加进程,线程记录
- 日志写入到文件的格式,日志写入格式可以与控制台单独分开设置
- 而默认的输出模式是这样的
- 如何封装loguru为工具类/修改控制台日志输出和日期写入的格式/关闭日志写入
-
- 为什么有关闭日志写入的需求呢?
- 分享自己从作者的源码中查到的一些参数说明.用于调整日志的输出格式(颜色等)
loguru的git网址,点我去
先看二次封装loguru后的结果如何.
控制台输出,增加进程,线程记录
日志写入到文件的格式,日志写入格式可以与控制台单独分开设置
而默认的输出模式是这样的
我更改了其输出的格式使我们可以利用编辑器(pycharm)快速定位到问题所在
说明:loguru的格式化输出,控制台和日志写入是不同的,分开设置的.
以pycharm为例,**我们鼠标选中黄色区域,Ctrl+Shift+N 即可在ALL中找到该方法(精确到行号)**快速定位到日志显示的代码所在.这里笔者只是做了简单的演示,更多的需求可以自己更改实现.
如何封装loguru为工具类/修改控制台日志输出和日期写入的格式/关闭日志写入
为什么有关闭日志写入的需求呢?
因为某些场景下降低多线程/多进程下磁盘性能开销;
前置条件:
pip install loguru
import sys
from loguru import logger
my_log_file_path = "test_log"
class MyLogger:
def __init__(self, log_file_path=my_log_file_path):
self.logger = logger
# 清空所有设置
self.logger.remove()
# 添加控制台输出的格式,sys.stdout为输出到屏幕;关于这些配置还需要自定义请移步官网查看相关参数说明
self.logger.add(sys.stdout,
format="{time:YYYYMMDD HH:mm:ss} | " # 颜色>时间
"{process.name} | " # 进程名
"{thread.name} | " # 进程名
"{module} .{function} " # 模块名.方法名
":{line} | " # 行号
"{level} : " # 等级
"{message} ", # 日志内容
)
# 输出到文件的格式,注释下面的add',则关闭日志写入
self.logger.add(log_file_path, level='DEBUG',
format='{time:YYYYMMDD HH:mm:ss} - ' # 时间
"{process.name} | " # 进程名
"{thread.name} | " # 进程名
'{module}.{function}:{line} - {level} -{message}', # 模块名.方法名:行号
rotation="10 MB")
def get_logger(self):
return self.logger
my_logger = MyLogger().get_logger()
def ss():
my_logger.info(2222222)
my_logger.debug(2222222)
my_logger.warning(2222222)
my_logger.error(2222222)
my_logger.exception(2222222)
if __name__ == '__main__':
ss()
分享自己从作者的源码中查到的一些参数说明.用于调整日志的输出格式(颜色等)
+------------+---------------------------------+----------------------------+
| Key | Description | Attributes |
+============+=================================+============================+
| elapsed | The time elapsed since the | See |timedelta| |
| | start of the program | |
+------------+---------------------------------+----------------------------+
| exception | The formatted exception if any, | ``type``, ``value``, |
| | ``None`` otherwise | ``traceback`` |
+------------+---------------------------------+----------------------------+
| extra | The dict of attributes | None |
| | bound by the user (see |bind|) | |
+------------+---------------------------------+----------------------------+
| file | The file where the logging call | ``name`` (default), |
| | was made | ``path`` |
+------------+---------------------------------+----------------------------+
| function | The function from which the | None |
| | logging call was made | |
+------------+---------------------------------+----------------------------+
| level | The severity used to log the | ``name`` (default), |
| | message | ``no``, ``icon`` |
+------------+---------------------------------+----------------------------+
| line | The line number in the source | None |
| | code | |
+------------+---------------------------------+----------------------------+
| message | The logged message (not yet | None |
| | formatted) | |
+------------+---------------------------------+----------------------------+
| module | The module where the logging | None |
| | call was made | |
+------------+---------------------------------+----------------------------+
| name | The ``__name__`` where the | None |
| | logging call was made | |
+------------+---------------------------------+----------------------------+
| process | The process in which the | ``name``, ``id`` (default) |
| | logging call was made | |
+------------+---------------------------------+----------------------------+
| thread | The thread in which the | ``name``, ``id`` (default) |
| | logging call was made | |
+------------+---------------------------------+----------------------------+
| time | The aware local time when the | See |datetime| |
| | logging call was made | |
+------------+---------------------------------+----------------------------+
+------------------------------------+--------------------------------------+
| Color (abbr) | Styles (abbr) |
+====================================+======================================+
| Black (k) | Bold (b) |
+------------------------------------+--------------------------------------+
| Blue (e) | Dim (d) |
+------------------------------------+--------------------------------------+
| Cyan (c) | Normal (n) |
+------------------------------------+--------------------------------------+
| Green (g) | Italic (i) |
+------------------------------------+--------------------------------------+
| Magenta (m) | Underline (u) |
+------------------------------------+--------------------------------------+
| Red (r) | Strike (s) |
+------------------------------------+--------------------------------------+
| White (w) | Reverse (v) |
+------------------------------------+--------------------------------------+
| Yellow (y) | Blink (l) |
+------------------------------------+--------------------------------------+
| | Hide (h) |
+------------------------------------+--------------------------------------+