我试图用一些基本的代数和物理来表达对象。定义诸如
之类的等式时import sympy as sy
g,h = sy.Symbols("g h")
v = sy.sqrt(2 * g * h)
等式v扩展到
v = sqrt(2) * sqrt(g * h)
有一种方法可以指定系数＆＃34; 2＆＃34;不应该被考虑在内 在平方根下，sqare根下的项保持为＆＃34; 2 * g * h＆＃34;？我想这样做的原因是基础物理学和得到的方程的推导有时更清楚，看看相关系数是否没有被考虑在内。
另一个例子就是计算像
这样的等式中的弧长度phi = sy.symbols("phi")
r = sy.symbols("r")
a= r * phi
表示角度的两倍
phi = sy.pi / 4
，如
a = r * (2 * phi)
收集到
a = r * sy.pi / 2
当
a = r * 2 * (sy.pi / 4)
可能更清楚地显示结果是如何获得的。
答案 0 :(得分：2)
有没有办法指定系数＆＃34; 2＆＃34;不应该是 从平方根和sqare下的术语中分解出来 root保持为＆＃34; 2 * g * h＆＃34;？
是的，只需使用可选参数 <!DOCTYPE html>
<html>
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<link rel="stylesheet" type="text/css" href="css/fonts.css"/>
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<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
</head>
<body>
<div id="wrapper">
<header>
<img src="../images/banner.jpg">
</header>
<div id="jobInterview">
<h1>Allied Health Assistant Job Interview</h1>
<img src="../images/panelinterview.jpeg" alt="interview panel">
<h2>Answer the questions provided</h2>
<p>Note: when the timer finishes it will reset for the next question until the interview is finished</p>
<h2 id="message"></h2>
<video id="myVideo" width="160" height="120" autoplay loop>
<source src="../videos/timer.mp4" type="video/mp4" >
Your browser does not support the video tag.
</video>
<script>
var questions = [
"Question 1 <br> What interests you about this job?",
"Question 2 <br>What new skills are you looking to develop as an allied health assistant? ",
"Question 3 <br>Tell me about a successful team project that you have been involved in. What was your role and what made it a success?",
"Question 4 <br>What is your greatest strength?",
"Question 5 <br>What are you passionate about? "
];
var vid = document.getElementById("myVideo");
$( document ).ready(function() {
function showQuestion() {
if (questions.length == 0) {
window.location.replace("../finish.html");
}
else {
$('#message').html(questions.shift()).fadeIn(500).delay(180000).fadeOut(500);
}
}
});
function nextQuestion() {
$('#message').html(questions.shift()).fadeIn(500).delay(180000).fadeOut(500);
vid.currentTime=0;
}
</script>
<button id="next-question" onClick="nextQuestion()">Next Question</button>
</div>
</div><!-----CLOSE WRAPPER DIV------>
</body>
</html>
创建Pow对象（加电）：
evaluate=False也就是说，>>> Pow(2*g*h, S(1)/2, evaluate=False)
_______
\/ 2*g*h
由2*g*h（一半）引发。 S(1)/2禁用对象构造期间的自动评估。