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python - 为什么我使用 click.argument 会产生 "got an unexpected keyword argument ' 帮助?

运行以下代码会导致此错误:TypeError:init()gotanunexpectedkeywordargument'help'代码:importclick@click.command()@click.argument('command',required=1,help="start|stop|restart")@click.option('--debug/--no-debug',default=False,help="Runinforeground")defmain(command,debug):print(command)print(debug)if__name__=='__ma

html - 验证错误 "Bad value apple-touch-icon-precomposed for attribute rel on element link: Keyword apple-touch-icon-precomposed is not registered."

我在w3CHTML5验证器中遇到这个错误Line9,Column101:Badvalueapple-touch-icon-precomposedforattributerelonelementlink:Keywordapple-touch-icon-precomposedisnotregistered.…-icon-precomposed"sizes="72x72"href="images/sl/touch/m/apple-touch-icon.png">Syntaxoflinktypevalidfor:Awhitespace-separatedlistoflinktypesliste

html - 验证错误 "Bad value apple-touch-icon-precomposed for attribute rel on element link: Keyword apple-touch-icon-precomposed is not registered."

我在w3CHTML5验证器中遇到这个错误Line9,Column101:Badvalueapple-touch-icon-precomposedforattributerelonelementlink:Keywordapple-touch-icon-precomposedisnotregistered.…-icon-precomposed"sizes="72x72"href="images/sl/touch/m/apple-touch-icon.png">Syntaxoflinktypevalidfor:Awhitespace-separatedlistoflinktypesliste

html - LessCSS : multiple class selectors with & keyword

说-有一个带有大量“多个”CSS规则的.less工作表来管理图标。像这样:.icon{display:inline-block;position:relative;text-indent:-9999em;}.icon-l.legend{width:24px;height:24px;}.icon-white.legend{background:url(@icon_legend_white)no-repeat;}.icon-l.arrow_left{background-position:-128px-32px;}并应用这样的规则:正如人们所期望的那样,当我可以访问标记时,这工作正常,但我

html - LessCSS : multiple class selectors with & keyword

说-有一个带有大量“多个”CSS规则的.less工作表来管理图标。像这样:.icon{display:inline-block;position:relative;text-indent:-9999em;}.icon-l.legend{width:24px;height:24px;}.icon-white.legend{background:url(@icon_legend_white)no-repeat;}.icon-l.arrow_left{background-position:-128px-32px;}并应用这样的规则:正如人们所期望的那样,当我可以访问标记时,这工作正常,但我

c# - "Use the new keyword if hiding was intended"警告

我的屏幕底部有一个警告:Warning1'WindowsFormsApplication2.EventControlDataSet.Events'hidesinheritedmember'System.ComponentModel.MarshalByValueComponent.Events'.Usethenewkeywordifhidingwasintended.C:\Users\myComputer\Desktop\EventControl\WindowsFormsApplication2\EventControlDataSet.Designer.cs11232eventContr

c# - "Use the new keyword if hiding was intended"警告

我的屏幕底部有一个警告:Warning1'WindowsFormsApplication2.EventControlDataSet.Events'hidesinheritedmember'System.ComponentModel.MarshalByValueComponent.Events'.Usethenewkeywordifhidingwasintended.C:\Users\myComputer\Desktop\EventControl\WindowsFormsApplication2\EventControlDataSet.Designer.cs11232eventContr

C# : 'is' keyword and checking for Not

这是一个愚蠢的问题,但您可以使用这段代码来检查某物是否是特定类型...if(childisIContainer){//....是否有更优雅的方法来检查“NOT”实例?if(!(childisIContainer)){//Alittleugly...silly,yesIknow...//thesedon'twork:)if(child!isIContainer){if(childisntIContainer){if(childaintIContainer){if(childisnotafreakingIContainer){是的,是的......愚蠢的问题......因为对代码的样子有一

C# : 'is' keyword and checking for Not

这是一个愚蠢的问题,但您可以使用这段代码来检查某物是否是特定类型...if(childisIContainer){//....是否有更优雅的方法来检查“NOT”实例?if(!(childisIContainer)){//Alittleugly...silly,yesIknow...//thesedon'twork:)if(child!isIContainer){if(childisntIContainer){if(childaintIContainer){if(childisnotafreakingIContainer){是的,是的......愚蠢的问题......因为对代码的样子有一

javascript - ES6 : call class constructor without new keyword

给定一个简单的类classFoo{constructor(x){if(!(thisinstanceofFoo))returnnewFoo(x);this.x=x;}hello(){return`hello${this.x}`;}}是否可以在不使用new关键字的情况下调用类构造函数?使用应该允许(newFoo("world")).hello();//"helloworld"或者Foo("world").hello();//"helloworld"但后者失败了Cannotcallaclassasafunction 最佳答案 类有一个“类