4zhvml8 发表于 2024-10-4 14:47:52

聊聊 PHP 和Python-入门级别的介绍


    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">本篇<span style="color: black;">文案</span>是非常<span style="color: black;">基本</span>入门级别的,<span style="color: black;">博主</span><span style="color: black;">始终</span>从事的是Java后端<span style="color: black;">研发</span>、Vue前端<span style="color: black;">研发</span>、虚拟化<span style="color: black;">安排</span>容器<span style="color: black;">安排</span>、以及Shell脚本编写等等,<span style="color: black;">始终</span>想找个时间好好<span style="color: black;">认识</span>一下PHP和Python语言,来扩管自己的知识面,<span style="color: black;">因此呢</span>,本文介绍的内容非常<span style="color: black;">基本</span>,<span style="color: black;">做为</span>学习的一个开篇。</p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/8fe1ff1515db4a8d8e425413370a6a48~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728213358&amp;x-signature=wg9fUwXDdcl9SIkqnW5%2B0GMCN3c%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">1、</span>PHP和Python的区别</h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(1)PHP 和 Python 是两种<span style="color: black;">区别</span>的编程语言,<span style="color: black;">拥有</span><span style="color: black;">区别</span>的语法、语义和用途。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是它们的<span style="color: black;">重点</span>区别:</p>用途:PHP <span style="color: black;">重点</span>用于服务器端的网页<span style="color: black;">研发</span>,而 Python <span style="color: black;">能够</span>用于<span style="color: black;">各样</span><span style="color: black;">行业</span>,如 Web <span style="color: black;">研发</span>、数据科学、人工智能、自然语言处理等。语法:PHP 的语法类似于 C 语言,而 Python 的语法则更接近于自然语言。性能:PHP <span style="color: black;">一般</span>比 Python 运行速度更快,但在<span style="color: black;">有些</span>特定<span style="color: black;">行业</span>(如<span style="color: black;">设备</span>学习和数据科学)中,Python 更快。生态系统:PHP <span style="color: black;">持有</span>庞大的用户群和库,但 Python 的库<span style="color: black;">更加多</span>,更易于<span style="color: black;">运用</span>和学习。<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是一个 PHP 的示例:</p><span style="color: black;">&lt;!DOCTYPE <span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">title</span>&gt;</span>Hello World!<span style="color: black;">&lt;/<span style="color: black;">title</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;"><span style="color: black;">&lt;?php</span>
      <span style="color: black;">echo</span> <span style="color: black;">"Hello, World!"</span>;
      <span style="color: black;">?&gt;</span></span>
    <span style="color: black;">&lt;/<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">html</span>&gt;</span>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是一个 Python 的示例:</p><span style="color: black;">print</span>(<span style="color: black;">"Hello, World!"</span>)<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">这两个示例分别展示了<span style="color: black;">怎样</span>在 PHP 和 Python 中打印 "Hello, World!"。在 PHP 中,<span style="color: black;">咱们</span>将它放在一个 HTML 页面中,并<span style="color: black;">运用</span> PHP 标记将其包裹起来。在 Python 中,<span style="color: black;">咱们</span>只需<span style="color: black;">运用</span>一个简单的 print() 语句。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">(2)除了语法和用途等表面上的区别外,PHP 和 Python 还有<span style="color: black;">有些</span>深层次的<span style="color: black;">区别</span>之处。下面是<span style="color: black;">有些</span>值得<span style="color: black;">重视</span>的区别:</p>弱类型和强类型:PHP 是一种弱类型语言,这<span style="color: black;">寓意</span>着在变量赋值时不需要<span style="color: black;">知道</span>指定变量类型,PHP 会自动进行类型转换。相反,Python 是一种强类型语言,变量必须在赋值时<span style="color: black;">知道</span>指定类型,并且在<span style="color: black;">运用</span>时不会进行自动类型转换。面向对象编程:PHP 的面向对象编程(OOP)功能相对较弱,而 Python <span style="color: black;">拥有</span>强大的 OOP 功能。Python 中的类和对象更加灵活,支持多重继承和其他高级 OOP 功能。包管理工具:Python 的包管理工具(如 pip 和 conda)相<span style="color: black;">针对</span> PHP 更加强大和易用。Python 的生态系统非常丰富,有许多优秀的第三方库和工具可供<span style="color: black;">运用</span>。<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是一个 PHP 和 Python 的示例,演示了如何实现一个简单的计算器功能:</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">PHP:</strong></p><span style="color: black;">&lt;!DOCTYPE <span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">title</span>&gt;</span>Calculator<span style="color: black;">&lt;/<span style="color: black;">title</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">form</span> <span style="color: black;">method</span>=<span style="color: black;">"post"</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">input</span> <span style="color: black;">type</span>=<span style="color: black;">"text"</span> <span style="color: black;">name</span>=<span style="color: black;">"num1"</span> <span style="color: black;">placeholder</span>=<span style="color: black;">"Enter first number"</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">input</span> <span style="color: black;">type</span>=<span style="color: black;">"text"</span> <span style="color: black;">name</span>=<span style="color: black;">"num2"</span> <span style="color: black;">placeholder</span>=<span style="color: black;">"Enter second number"</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">select</span> <span style="color: black;">name</span>=<span style="color: black;">"operator"</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">option</span>&gt;</span>None<span style="color: black;">&lt;/<span style="color: black;">option</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">option</span>&gt;</span>Add<span style="color: black;">&lt;/<span style="color: black;">option</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">option</span>&gt;</span>Subtract<span style="color: black;">&lt;/<span style="color: black;">option</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">option</span>&gt;</span>Multiply<span style="color: black;">&lt;/<span style="color: black;">option</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">option</span>&gt;</span>Divide<span style="color: black;">&lt;/<span style="color: black;">option</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">select</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">br</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">button</span> <span style="color: black;">type</span>=<span style="color: black;">"submit"</span> <span style="color: black;">name</span>=<span style="color: black;">"submit"</span> <span style="color: black;">value</span>=<span style="color: black;">"submit"</span>&gt;</span>Calculate<span style="color: black;">&lt;/<span style="color: black;">button</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">form</span>&gt;</span>

    <span style="color: black;"><span style="color: black;">&lt;?php</span>
      <span style="color: black;">if</span> (<span style="color: black;">isset</span>($_POST[<span style="color: black;">submit</span>])) {
      $num1 = $_POST[<span style="color: black;">num1</span>];
      $num2 = $_POST[<span style="color: black;">num2</span>];
      $operator = $_POST[<span style="color: black;">operator</span>];

      <span style="color: black;">switch</span> ($operator) {
      <span style="color: black;">case</span> <span style="color: black;">None</span>:
      <span style="color: black;">echo</span> <span style="color: black;">"Please select an operator"</span>;
      <span style="color: black;">break</span>;
      <span style="color: black;">case</span> <span style="color: black;">Add</span>:
      <span style="color: black;">echo</span> $num1 + $num2;
      <span style="color: black;">break</span>;
      <span style="color: black;">case</span> <span style="color: black;">Subtract</span>:
      <span style="color: black;">echo</span> $num1 - $num2;
      <span style="color: black;">break</span>;
      <span style="color: black;">case</span> <span style="color: black;">Multiply</span>:
      <span style="color: black;">echo</span> $num1 * $num2;
      <span style="color: black;">break</span>;
      <span style="color: black;">case</span> <span style="color: black;">Divide</span>:
      <span style="color: black;">echo</span> $num1 / $num2;
      <span style="color: black;">break</span>;
      }
      }
      <span style="color: black;">?&gt;</span></span>
    <span style="color: black;">&lt;/<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">html</span>&gt;</span>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">Python:</strong></p><span style="color: black;"><span style="color: black;">def</span> <span style="color: black;">calculator</span><span style="color: black;">()</span>:</span>
    num1 = int(input(<span style="color: black;">"Enter first number: "</span>))
    num2 = int(input(<span style="color: black;">"Enter second number: "</span>))

    print(<span style="color: black;">"Select an operation: "</span>)
    print(<span style="color: black;">"1. Add"</span>)
    print(<span style="color: black;">"2. Subtract"</span>)
    print(<span style="color: black;">"3. Multiply"</span>)
    print(<span style="color: black;">"4. Divide"</span>)
    choice = input(<span style="color: black;">"Enter choice (1/2/3/4): "</span>)

    <span style="color: black;">if</span> choice == <span style="color: black;">1</span>:
    print(num1 + num2)
    <span style="color: black;">elif</span> choice == <span style="color: black;">2</span>:
    print(num1 - num2)
    <span style="color: black;">elif</span> choice == <span style="color: black;">3</span>:
    print(num1 * num2)<span style="color: black;">elif</span> choice == <span style="color: black;">4</span>:
    print(num1 / num2)
    <span style="color: black;">else</span>:
    print(<span style="color: black;">"Invalid choice"</span>)


    calculator()<h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">2、</span>PHP和HTML的区别</h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">PHP 和 HTML 都是用于网站<span style="color: black;">研发</span>的语言,但它们的角色和用途有很大的区别。</p>HTML 是一种用于描述网页结构和内容的标记语言,它定义了一组标记,<span style="color: black;">能够</span>用于创建文本、图像、表格、链接等网页元素。HTML <span style="color: black;">重点</span>用于创建静态网页,<span style="color: black;">没法</span>进行动态操作和交互。PHP 是一种用于服务器端编程的脚本语言<strong style="color: blue;">,<span style="color: black;">能够</span>嵌入到 HTML 页面中,用于实现网页的动态功能</strong>。PHP <span style="color: black;">能够</span>与数据库进行交互,生成动态内容,处理表单数据等。HTML 页面由 HTML 标记<span style="color: black;">构成</span>,用于定义网页结构和内容。PHP 脚本<span style="color: black;">一般</span>嵌入在 HTML 页面中,<span style="color: black;">运用</span>特殊的 PHP 标记包裹起来,例如<strong style="color: blue;"> &lt;?php ?&gt;</strong>。HTML 文件<span style="color: black;">一般</span>以 .html 或 .htm 为后缀名,而 PHP 文件<span style="color: black;">一般</span>以 .php 为后缀名。<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是一个 HTML 和 PHP 的示例,演示<span style="color: black;">怎样</span>创建一个简单的表单:</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">HTML:</strong></p><span style="color: black;">&lt;!DOCTYPE <span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">title</span>&gt;</span>Form<span style="color: black;">&lt;/<span style="color: black;">title</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">form</span> <span style="color: black;">action</span>=<span style="color: black;">"submit.php"</span> <span style="color: black;">method</span>=<span style="color: black;">"post"</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">label</span> <span style="color: black;">for</span>=<span style="color: black;">"name"</span>&gt;</span>Name:<span style="color: black;">&lt;/<span style="color: black;">label</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">input</span> <span style="color: black;">type</span>=<span style="color: black;">"text"</span> <span style="color: black;">name</span>=<span style="color: black;">"name"</span> <span style="color: black;">id</span>=<span style="color: black;">"name"</span>&gt;</span><span style="color: black;">&lt;<span style="color: black;">br</span>&gt;</span>

    <span style="color: black;">&lt;<span style="color: black;">label</span> <span style="color: black;">for</span>=<span style="color: black;">"email"</span>&gt;</span>Email:<span style="color: black;">&lt;/<span style="color: black;">label</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">input</span> <span style="color: black;">type</span>=<span style="color: black;">"email"</span> <span style="color: black;">name</span>=<span style="color: black;">"email"</span> <span style="color: black;">id</span>=<span style="color: black;">"email"</span>&gt;</span><span style="color: black;">&lt;<span style="color: black;">br</span>&gt;</span>

    <span style="color: black;">&lt;<span style="color: black;">label</span> <span style="color: black;">for</span>=<span style="color: black;">"message"</span>&gt;</span>Message:<span style="color: black;">&lt;/<span style="color: black;">label</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">textarea</span> <span style="color: black;">name</span>=<span style="color: black;">"message"</span> <span style="color: black;">id</span>=<span style="color: black;">"message"</span>&gt;</span><span style="color: black;">&lt;/<span style="color: black;">textarea</span>&gt;</span><span style="color: black;">&lt;<span style="color: black;">br</span>&gt;</span>

    <span style="color: black;">&lt;<span style="color: black;">button</span> <span style="color: black;">type</span>=<span style="color: black;">"submit"</span>&gt;</span>Submit<span style="color: black;">&lt;/<span style="color: black;">button</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">form</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">html</span>&gt;</span>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">PHP:</strong></p><span style="color: black;">&lt;!DOCTYPE <span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">html</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">title</span>&gt;</span>Submit Form<span style="color: black;">&lt;/<span style="color: black;">title</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">head</span>&gt;</span>
    <span style="color: black;">&lt;<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;"><span style="color: black;">&lt;?php</span>
      <span style="color: black;">if</span> ($_SERVER[<span style="color: black;">"REQUEST_METHOD"</span>] == <span style="color: black;">"POST"</span>) {
      $name = $_POST[<span style="color: black;">"name"</span>];
      $email = $_POST[<span style="color: black;">"email"</span>];
      $message = $_POST[<span style="color: black;">"message"</span>];

      <span style="color: black;">echo</span> <span style="color: black;">"&lt;p&gt;Thank you for your submission, $name!&lt;/p&gt;"</span>;
      <span style="color: black;">echo</span> <span style="color: black;">"&lt;p&gt;We will respond to you at $email as soon as possible.&lt;/p&gt;"</span>;
      <span style="color: black;">echo</span> <span style="color: black;">"&lt;p&gt;Your message:&lt;/p&gt;"</span>;
      <span style="color: black;">echo</span> <span style="color: black;">"&lt;p&gt;$message&lt;/p&gt;"</span>;
      }
      <span style="color: black;">?&gt;</span></span>
    <span style="color: black;">&lt;/<span style="color: black;">body</span>&gt;</span>
    <span style="color: black;">&lt;/<span style="color: black;">html</span>&gt;</span>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在这个例子中,HTML 页面<span style="color: black;">包括</span>一个表单,用户<span style="color: black;">能够</span>填写姓名、电子邮件和留言。表单的 action 属性指向 submit.php 文件,当用户点击“提交”按钮时,表单数据将被提交到该文件中。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">submit.php 文件<span style="color: black;">包括</span>一个 PHP 脚本,用于处理表单数据。在这个示例中,脚本从 $_POST 数组中读取表单数据,并将其用于生成一条<span style="color: black;">信息</span>,向用户<span style="color: black;">表示</span>感谢和反馈信息。<span style="color: black;">重视</span>,这个 PHP 脚本嵌入在 HTML 页面中,<span style="color: black;">运用</span>了 &lt;?php ?&gt; 标记。</p>
    <h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">3、</span>PHP融合MySQL<span style="color: black;">研发</span></h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">以下是一个<span style="color: black;">运用</span> PHP 和 MySQL <span style="color: black;">研发</span>的示例,演示<span style="color: black;">怎样</span>连接到 MySQL 数据库、<span style="color: black;">查找</span>数据和<span style="color: black;">插进</span>数据:</p><span style="color: black;"><span style="color: black;">&lt;?php</span>
      <span style="color: black;">// 连接到 MySQL 数据库</span>
      $servername = <span style="color: black;">"localhost"</span>;
      $username =<span style="color: black;">"username"</span>;
      $password = <span style="color: black;">"password"</span>;
      $dbname = <span style="color: black;">"myDB"</span>;

      $conn = mysqli_connect($servername, $username, $password, $dbname);
      <span style="color: black;">if</span>(!$conn) {<span style="color: black;">die</span>(<span style="color: black;">"连接失败: "</span> . mysqli_connect_error());
      }

      <span style="color: black;">// <span style="color: black;">查找</span>数据</span>
      $sql = <span style="color: black;">"SELECT id, firstname, lastname FROM MyGuests"</span>;
      $result = mysqli_query($conn, $sql);<span style="color: black;">if</span> (mysqli_num_rows($result) &gt; <span style="color: black;">0</span>) {
      <span style="color: black;">// 输出数据</span>
      <span style="color: black;">while</span>($row = mysqli_fetch_assoc($result)) {
      <span style="color: black;">echo</span> <span style="color: black;">"id: "</span> . $row[<span style="color: black;">"id"</span>]. <span style="color: black;">" - Name: "</span> . $row[<span style="color: black;">"firstname"</span>]. <span style="color: black;">" "</span> . $row[<span style="color: black;">"lastname"</span>]. <span style="color: black;">"&lt;br&gt;"</span>;
      }
      } <span style="color: black;">else</span> {
      <span style="color: black;">echo</span> <span style="color: black;">"0 结果"</span>;
      }

      <span style="color: black;">// <span style="color: black;">插进</span>数据</span>
      $sql = <span style="color: black;">"INSERT INTO MyGuests (firstname, lastname, email) VALUES (John, Doe, john@example.com)"</span>;

      <span style="color: black;">if</span> (mysqli_query($conn, $sql)) {
      <span style="color: black;">echo</span> <span style="color: black;">"新记录<span style="color: black;">插进</span>成功"</span>;
      } <span style="color: black;">else</span> {
      <span style="color: black;">echo</span> <span style="color: black;">"Error: "</span> . $sql . <span style="color: black;">"&lt;br&gt;"</span>. mysqli_error($conn);
      }

      mysqli_close($conn);<span style="color: black;">?&gt;</span></span>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在这个示例中,<span style="color: black;">首要</span><span style="color: black;">运用</span> mysqli_connect() 函数连接到 MySQL 数据库。<span style="color: black;">而后</span><span style="color: black;">运用</span> mysqli_query() 函数执行 SQL <span style="color: black;">查找</span>语句,并<span style="color: black;">运用</span> mysqli_fetch_assoc() 函数将结果集转换为<span style="color: black;">相关</span>数组,以便在 PHP 中处理<span style="color: black;">查找</span>结果。最后,<span style="color: black;">运用</span> mysqli_close() 函数关闭数据库连接。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">在上面的示例中,<span style="color: black;">咱们</span>还演示了<span style="color: black;">怎样</span><span style="color: black;">运用</span> SQL <span style="color: black;">插进</span>语句向数据库中<span style="color: black;">插进</span>新数据。<span style="color: black;">重视</span>,<span style="color: black;">倘若</span><span style="color: black;">插进</span>操作失败,<span style="color: black;">咱们</span><span style="color: black;">运用</span> mysqli_error() 函数获取错误<span style="color: black;">信息</span>。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">需要<span style="color: black;">重视</span>的是,这只是一个简单的示例,<span style="color: black;">实质</span>的<span style="color: black;">研发</span>过程可能需要<span style="color: black;">更加多</span>的安全性和错误处理<span style="color: black;">办法</span>,例如对用户输入进行验证和过滤。</p>
    <h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">4、</span>Python 和 Java</h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Python 和 Java 是两种非常受欢迎的编程语言,它们都有自己的优缺点和适用场景。下面是<span style="color: black;">有些</span> Python 和 Java 的<span style="color: black;">重点</span>区别:</p>语法和风格:Python 的语法相对简单,易于学习和阅读。Python <span style="color: black;">一般</span><span style="color: black;">运用</span>缩进来<span style="color: black;">暗示</span>代码块,而不是<span style="color: black;">运用</span>花括号或其他标记。Java 语法相对<span style="color: black;">繁杂</span>,需要较<span style="color: black;">长期</span>的学习和练习。Java <span style="color: black;">一般</span><span style="color: black;">运用</span>大括号来<span style="color: black;">暗示</span>代码块。性能:Java 的性能<span style="color: black;">一般</span>比 Python 更好,<span style="color: black;">由于</span> Java 是编译型语言,<span style="color: black;">能够</span>在编译时进行优化。Python 是解释型语言,<span style="color: black;">因此呢</span>需要在运行时进行解释和执行,<span style="color: black;">一般</span>比编译型语言慢。应用场景:Python 在科学计算、数据分析、人工智能、Web <span style="color: black;">研发</span>等方面非常受欢迎。Java <span style="color: black;">一般</span>用于企业级应用、桌面应用、移动应用等。生态系统和社区:Java <span style="color: black;">持有</span>强大的生态系统和庞大的<span style="color: black;">研发</span>社区,有许多优秀的开源库和框架可供<span style="color: black;">运用</span>。Python 社区<span style="color: black;">一样</span>庞大,<span style="color: black;">持有</span>许多强大的库和框架,<span style="color: black;">尤其</span>是在数据科学和人工智能方面。<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">下面是一个<span style="color: black;">运用</span> Python 和 Java 编写的 Hello World 示例:</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Python 示例:</p><span style="color: black;">print</span>(<span style="color: black;">"Hello, World!"</span>)<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">Java 示例:</p><span style="color: black;">public</span> <span style="color: black;">class</span> <span style="color: black;">HelloWorld</span> {
    <span style="color: black;"><span style="color: black;">public</span> <span style="color: black;">static</span> <span style="color: black;">void</span> <span style="color: black;">main</span>(<span style="color: black;">String[] args</span>)</span> {
    System.<span style="color: black;">out</span>.println(<span style="color: black;">"Hello, World!"</span>);
    }
    }<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">需要<span style="color: black;">重视</span>的是,这两种语言的语法和风格<span style="color: black;">区别</span>,<span style="color: black;">因此呢</span>在编写代码时需要<span style="color: black;">重视</span>语法差异。<span style="color: black;">同期</span>,Python 和 Java 都有自己的优点和适用场景,<span style="color: black;">详细</span><span style="color: black;">选取</span>哪种语言取决于<span style="color: black;">详细</span><span style="color: black;">需要</span>和项目情况。</p>




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