Question

我正在寻找类似于Bash'!!的功能。

在Bash中，如果键入!!，它会将其替换为您键入的最后一个命令。例如，如果您键入which deactivate，然后键入cat $(!!)，则第二个命令将重新格式化为cat $(which deactivate)。

在IPython中输入!!会给你留下一个空列表，我怀疑它是在试图从两个空字符串shell命令中传递一个输出列表。

是否有类似的方法将最后一个命令格式化为IPython中新键入的命令？

Answer 1

您可以通过引用输入数字来获取IPython中的任何先前输入：

<head>
<title>TODO list</title>
<link rel="stylesheet" type="text/css" href="assests/css/todos.css">
<link href="https://fonts.googleapis.com/css?family=Roboto:400,500,700" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<script type="text/javascript" src="assests/js/lib/jquery-3.2.1.min.js"></script>
</head>
<body>
    <div id="container">
        <h1>TO-DO List<i class="fa fa-plus"></i></h1>
        <input type="text" placeholder="Add New Todo">
        <ul>
            <li><span><i class="fa fa-trash"></i></span> Go To Potions Class</li>
            <li><span><i class="fa fa-trash"></i></span> Buy New Robes</li>
        <li><span><i class="fa fa-trash"></i></span> Visit Hogrid</li>
        </ul>
    </div>
<script type="text/javascript" src="assests/js/todos.js"></script>
</body>

如果您想获取当前行的上一个输入，可以使用h1{ background: #2980b9; color: white; margin: 0; padding: 10px 20px; text-transform: uppercase; font-size: 24px; font-weight: normal; } ul{ list-style: none; margin: 0; padding: 0; } #container{ box-shadow: 0 0 3px rgba(0,0,0, 0.1); width: 360px; margin: 100px auto; background: #f7f7f7; } .completed{ color: gray; text-decoration: line-through; } body{ font-family: 'Roboto', sans-serif; background: #2BC0E4; /* fallback for old browsers */ background: -webkit-linear-gradient(to right, #EAECC6, #2BC0E4); /* Chrome 10-25, Safari 5.1-6 */ background: linear-gradient(to right, #EAECC6, #2BC0E4); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */ } li{ background: white; height: 40px; line-height: 40px; color: #666; } li:nth-child(2n){ background: #f7f7f7; } input{ font-size: 18px; background:#f7f7f7; width: 100%; padding: 13px 13px 20px 20px; box-sizing:border-box; color: #2980b9; border:3px solid rgba(0,0,0,0); } input:focus{ background:white; border: 3px solid #2980b9; outline: none; } .fa-plus{ float: right; } span{ background-color: #e74c3c; height:40px; margin-right: 20px; text-align: center; color: white; width:0px; display:inline-block; transition: 0.2s linear; opacity:0; } li:hover span{ width:40px; opacity:1.0; }或$("ul").on("click","li",function(){ $(this).toggleClass("completed"); }); //click on X to delete TODO $("ul").on("click","span",function(event){ //to remove parent lis $(this).parent().fadeOut(500,function(){ $(this).remove(); }); event.stopPropagation(); }); //adding new TODO $("input[type='text'").keypress(function(event){ if(event.which===13){ //grabbing new TODO text from input var todoText= $(this).val(); $(this).val(""); //create a new li and add to ul $("ul").append("<li><span><i class='fa fa-trash'><span> " + todoText +"</li>") } });（In [4]: 'hello' Out[4]: 'hello' In [5]: In[4] Out[5]: "'hello'"引用当前输入）：

_i

相当于Bash“!!”在IPython？

1 个答案: