在写代码的时候，往往会漏掉日志这个关键因素，导致功能在使用的时候出错却无法溯源。
其实，只需要写一个非常简单的日志装饰器，我们就能大大提升排查问题的效率。
1.简陋版装饰器
写一个装饰器非常简单，因为本质上装饰器就是一个返回函数的“高阶”函数而已：
1) 函数作为参数传递进装饰器。
2) 装饰器内定义一个函数，处理作为参数传递进来的函数。
3) 返回这个装饰器内定义的函数
用一下试试看：
效果如下：
虽然这样可以实现我们所需要的功能，但其实有很大的优化空间。
2.普通版装饰器
第一版代码中有一个显而易见的问题，装饰器内定义的处理函数不支持kwargs，而在装饰器中支持kwargs仅仅是举手之劳而已。
第二个问题是，生成时间戳的时候采用字符串截取的形式，这种形式过于粗暴。其实可以使用strftime做字符串转换。
修改如下：
似乎优化得差不多了，不过依然存在改进空间。
3.优化版装饰器
在前两版代码中，我们使用print进行日志输出，其实这种处理日志的方式并不标准。
使用logging模块控制日志输出是一个更好地选择。
为了使用logging模块记录日志，我们需要先配置好logging相关的选项。
1) 首先，生成一个日志记录器，并配置日志等级：
2) 配置日志格式、增加handler控制输出流：
此处可以设置handler所需要处理的日志等级，没有设置则默认使用logger自身的Level，即DEBUG等级。
3) 最后，将此handler加入到日志记录器内：
logging 完整配置如下：
使用的时候非常简单，就是把print换成logger.debug即可：
效果如下：
这样，一个比较完善的日志装饰器就完成了。
附常用的日志等级配置：
我们的文章到此就结束啦，如果你喜欢今天的Python 实战教程，请持续关注我们。
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<section data-mpa-template="t" mpa-from-tpl="t" data-darkmode-bgcolor-15923650965579="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15923650965579="rgb(255, 255, 255)" data-darkmode-color-15923650965579="rgb(168, 168, 168)" data-darkmode-original-color-15923650965579="rgb(62, 62, 62)" data-style="color: rgb(62, 62, 62); font-size: 15px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255); font-family: monospace; text-align: left; widows: 1; word-spacing: 2px; caret-color: rgb(255, 0, 0); white-space: pre-wrap;" style="max-width: 100%;font-size: 15px;letter-spacing: 0.544px;word-spacing: 2px;caret-color: rgb(255, 0, 0);color: rgb(62, 62, 62);white-space: pre-wrap;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section mpa-from-tpl="t" data-darkmode-bgcolor-15923650965579="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15923650965579="rgb(255, 255, 255)" data-darkmode-color-15923650965579="rgb(168, 168, 168)" 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62, 62); widows: 1; word-spacing: 2px;" style="max-width: 100%;letter-spacing: 0.544px;box-sizing: border-box !important;overflow-wrap: break-word !important;"><pre style="max-width: 100%;letter-spacing: 0.544px;text-align: left;box-sizing: border-box !important;overflow-wrap: break-word !important;"><h1 style="max-width: 100%;white-space: pre-wrap;letter-spacing: 0.544px;font-family: 微软雅黑;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><pre style="max-width: 100%;letter-spacing: 0.544px;line-height: inherit;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section data-mpa-template="t" mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section data-id="94086" data-color="#276ca3" data-tools="135编辑器" mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><pre style="max-width: 100%;color: rgb(63, 63, 63);letter-spacing: 0.544px;line-height: inherit;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section data-mpa-template="t" mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section data-id="94086" data-color="#276ca3" data-tools="135编辑器" mpa-from-tpl="t" style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section mpa-from-tpl="t" style="max-width: 100%;display: inline-block;box-sizing: border-box 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data-darkmode-original-color-15900529136199="rgba(230, 230, 230, 0.9)" style="max-width: 100%;letter-spacing: 0.544px;text-align: center;color: rgba(230, 230, 230, 0.9);line-height: 25.6px;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section style="max-width: 100%;box-sizing: border-box !important;overflow-wrap: break-word !important;"><section data-darkmode-bgcolor-15860613985508="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15860613985508="rgb(255, 255, 255)" data-darkmode-color-15860613985508="rgb(230, 230, 230)" data-darkmode-original-color-15860613985508="rgb(0, 0, 0)" data-darkmode-bgcolor-15870356070738="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15870356070738="rgb(255, 255, 255)" data-darkmode-color-15870356070738="rgb(230, 230, 230)" data-darkmode-original-color-15870356070738="rgb(0, 0, 0)" data-darkmode-bgcolor-15870356071023="rgb(36, 36, 36)" data-darkmode-original-bgcolor-15870356071023="rgb(255, 255, 255)" 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