text-align:center;的主函数
时间: 2023-11-23 15:25:06 浏览: 39
"text-align:center;"不是一个主函数,它是CSS的样式属性之一。它用于设置一个元素的文本水平居中对齐方式。在HTML中,可以通过在HTML标签中添加style属性来设置CSS样式,例如:
```
<p style="text-align:center;">这是居中对齐的文本</p>
```
这个例子中,`text-align:center;`样式被应用于`p`标签,使得其中的文本居中对齐。在CSS中,还可以通过选择器来选择多个元素,并为其设置相同的样式,例如:
```
.center {
text-align: center;
}
```
这个例子中,`.center`是一个类选择器,它可以选择所有使用该类的元素,并将其中的文本居中对齐。
相关问题
from flask import Flask, request, jsonify import torch from transformers import BertTokenizer, BertForSequenceClassification import logging app = Flask(name) logging.basicConfig(level=logging.INFO) tokenizer = BertTokenizer.from_pretrained('bert-base-chinese') model = BertForSequenceClassification.from_pretrained('bert-base-chinese', num_labels=2) model.eval() @app.route('/classify', methods=['POST']) def classify(): try: text = request.json['text'] inputs = tokenizer(text, return_tensors='pt') outputs = model(**inputs) logits = outputs.logits probabilities = torch.softmax(logits, dim=1) predicted_label = torch.argmax(probabilities, dim=1).item() if predicted_label == 0: result = '负面' else: result = '正面' logging.info(f'Text: {text}, Result: {result}') return jsonify({'result': result}) except Exception as e: logging.error(f'Error: {e}') return jsonify({'error': str(e)}) if name == 'main': app.run()这个是我的py代码,同一文件夹下,有一个html代码,叫做classify.html,代码如下:<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>BERT文本分类</title> <style> body { font-family: Arial, sans-serif; } h1 { text-align: center; } form { margin: 0 auto; width: 50%; text-align: center; } label { display: block; margin-top: 20px; } input[type="text"] { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } input[type="submit"] { background-color: #4CAF50; color: white; padding: 10px 20px; border: none; border-radius: 4px; cursor: pointer; } input[type="submit"]:hover { background-color: #45a049; } #result { margin-top: 20px; padding: 10px; border: 1px solid #ccc; border-radius: 4px; background-color: #f2f2f2; } </style> </head> <body> <h1>BERT文本分类</h1> <form> <label for="text">请输入文本:</label> <input type="text" id="text" name="text"> <input type="submit" value="提交"> </form> <div id="result"></div> <script> const form = document.querySelector('form'); const resultDiv = document.querySelector('#result'); form.addEventListener('submit', (event) => { event.preventDefault(); const text = document.querySelector('#text').value; fetch('/classify', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({text: text}) }) .then(response => response.json()) .then(data => { resultDiv.innerHTML = <p>分类结果:${data.result}</p>; }) .catch(error => { resultDiv.innerHTML = <p>出错了:${error.message}</p>; }); }); </script> </body> </html>,请问为什么打开后有问题呢,帮我解决一下,优化下代码
您的 Flask 应用程序需要在主函数中调用 app.run() 才能启动。因此,您可以将以下代码从 if name == 'main': 之前移到其后面:
```
if __name__ == '__main__':
app.run()
```
此外,您需要在 HTML 表单中添加一个 name 属性,以便表单数据能够被正确提取。因此,您需要将输入字段更改为以下内容:
```
<input type="text" id="text" name="text">
```
最后,您需要使用反斜杠(\)将 HTML 字符串拆分为多行,以使其更易于阅读。因此,您需要将以下代码更改为:
```
resultDiv.innerHTML = `<p>分类结果:${data.result}</p>`;
```
完整代码如下:
```
from flask import Flask, request, jsonify
import torch
from transformers import BertTokenizer, BertForSequenceClassification
import logging
app = Flask(__name__)
logging.basicConfig(level=logging.INFO)
tokenizer = BertTokenizer.from_pretrained('bert-base-chinese')
model = BertForSequenceClassification.from_pretrained('bert-base-chinese', num_labels=2)
model.eval()
@app.route('/classify', methods=['POST'])
def classify():
try:
text = request.form['text']
inputs = tokenizer(text, return_tensors='pt')
outputs = model(**inputs)
logits = outputs.logits
probabilities = torch.softmax(logits, dim=1)
predicted_label = torch.argmax(probabilities, dim=1).item()
if predicted_label == 0:
result = '负面'
else:
result = '正面'
logging.info(f'Text: {text}, Result: {result}')
return jsonify({'result': result})
except Exception as e:
logging.error(f'Error: {e}')
return jsonify({'error': str(e)})
if __name__ == '__main__':
app.run()
```
```
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>BERT文本分类</title>
<style>
body {
font-family: Arial, sans-serif;
}
h1 {
text-align: center;
}
form {
margin: 0 auto;
width: 50%;
text-align: center;
}
label {
display: block;
margin-top: 20px;
}
input[type="text"] {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
}
input[type="submit"] {
background-color: #4CAF50;
color: white;
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
}
input[type="submit"]:hover {
background-color: #45a049;
}
#result {
margin-top: 20px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
background-color: #f2f2f2;
}
</style>
</head>
<body>
<h1>BERT文本分类</h1>
<form>
<label for="text">请输入文本:</label>
<input type="text" id="text" name="text">
<input type="submit" value="提交">
</form>
<div id="result"></div>
<script>
const form = document.querySelector('form');
const resultDiv = document.querySelector('#result');
form.addEventListener('submit', (event) => {
event.preventDefault();
const text = document.querySelector('#text').value;
fetch('/classify', {
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded'
},
body: `text=${text}`
})
.then(response => response.json())
.then(data => {
resultDiv.innerHTML = `<p>分类结果:${data.result}</p>`;
})
.catch(error => {
resultDiv.innerHTML = `<p>出错了:${error.message}</p>`;
});
});
</script>
</body>
</html>
```
用javascript和css写2048游戏
以下是用JavaScript和CSS写的简单2048游戏的代码,可以在浏览器中运行:
HTML:
```html
<!DOCTYPE html>
<html>
<head>
<title>2048</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="container">
<div id="header">
<h1>2048</h1>
<div id="score">Score: 0</div>
</div>
<div id="gameboard"></div>
<button id="newgame">New Game</button>
<div id="endgame"></div>
</div>
<script type="text/javascript" src="script.js"></script>
</body>
</html>
```
CSS:
```css
body {
margin: 0;
padding: 0;
font-family: Arial, sans-serif;
background-color: #faf8ef;
}
#container {
margin: 0 auto;
width: 500px;
height: 600px;
background-color: #bbada0;
border-radius: 10px;
overflow: hidden;
}
#header {
padding: 20px;
background-color: #8f7a66;
color: #f9f6f2;
text-align: center;
}
#score {
font-size: 24px;
margin-top: 10px;
}
#gameboard {
margin: 20px;
width: 460px;
height: 460px;
background-color: #cdc1b4;
border-radius: 10px;
position: relative;
}
.tile {
position: absolute;
width: 100px;
height: 100px;
border-radius: 5px;
font-size: 48px;
font-weight: bold;
text-align: center;
line-height: 100px;
}
.tile-2 {
background-color: #eee4da;
color: #776e65;
}
.tile-4 {
background-color: #ede0c8;
color: #776e65;
}
.tile-8 {
background-color: #f2b179;
color: #f9f6f2;
}
.tile-16 {
background-color: #f59563;
color: #f9f6f2;
}
.tile-32 {
background-color: #f67c5f;
color: #f9f6f2;
}
.tile-64 {
background-color: #f65e3b;
color: #f9f6f2;
}
.tile-128 {
background-color: #edcf72;
color: #f9f6f2;
}
.tile-256 {
background-color: #edcc61;
color: #f9f6f2;
}
.tile-512 {
background-color: #edc850;
color: #f9f6f2;
}
.tile-1024 {
background-color: #edc53f;
color: #f9f6f2;
}
.tile-2048 {
background-color: #edc22e;
color: #f9f6f2;
}
#newgame {
display: block;
margin: 20px auto;
padding: 10px 20px;
background-color: #8f7a66;
border: none;
border-radius: 5px;
color: #f9f6f2;
font-size: 20px;
cursor: pointer;
}
#endgame {
display: none;
position: absolute;
width: 460px;
height: 460px;
border-radius: 10px;
background-color: rgba(238, 228, 218, 0.73);
text-align: center;
line-height: 460px;
font-size: 48px;
font-weight: bold;
color: #776e65;
}
```
JavaScript:
```javascript
var score = 0;
var gameboard = [];
var gameover = false;
// 创建一个空的4x4方格
function createGrid() {
for (var i = 0; i < 4; i++) {
gameboard[i] = [];
for (var j = 0; j < 4; j++) {
gameboard[i][j] = 0;
}
}
}
// 在空的方格中随机放置一个2或4
function addNewTile() {
var row = Math.floor(Math.random() * 4);
var col = Math.floor(Math.random() * 4);
while (gameboard[row][col] !== 0) {
row = Math.floor(Math.random() * 4);
col = Math.floor(Math.random() * 4);
}
gameboard[row][col] = Math.random() < 0.5 ? 2 : 4;
}
// 更新分数
function updateScore() {
document.getElementById("score").innerHTML = "Score: " + score;
}
// 显示方格
function showGrid() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
var tile = document.createElement("div");
tile.className = "tile tile-" + gameboard[i][j];
tile.style.top = (i * 120 + 20) + "px";
tile.style.left = (j * 120 + 20) + "px";
tile.innerHTML = gameboard[i][j] !== 0 ? gameboard[i][j] : "";
document.getElementById("gameboard").appendChild(tile);
}
}
}
// 清除方格
function clearGrid() {
var tiles = document.getElementsByClassName("tile");
while (tiles.length > 0) {
tiles[0].parentNode.removeChild(tiles[0]);
}
}
// 判断方格是否可以移动
function canMove() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] === 0) {
return true;
} else if (j > 0 && gameboard[i][j] === gameboard[i][j-1]) {
return true;
} else if (i > 0 && gameboard[i][j] === gameboard[i-1][j]) {
return true;
}
}
}
return false;
}
// 判断方格是否胜利
function isWin() {
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] === 2048) {
return true;
}
}
}
return false;
}
// 滑动方格
function slideLeft() {
var moved = false;
for (var i = 0; i < 4; i++) {
for (var j = 0; j < 3; j++) {
if (gameboard[i][j] !== 0) {
for (var k = j+1; k < 4; k++) {
if (gameboard[i][k] !== 0) {
if (gameboard[i][j] === gameboard[i][k]) {
gameboard[i][j] *= 2;
score += gameboard[i][j];
gameboard[i][k] = 0;
moved = true;
}
break;
}
}
}
}
var row = [];
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] !== 0) {
row.push(gameboard[i][j]);
}
}
while (row.length < 4) {
row.push(0);
}
for (var j = 0; j < 4; j++) {
if (gameboard[i][j] !== row[j]) {
moved = true;
}
gameboard[i][j] = row[j];
}
}
return moved;
}
// 主函数
function main() {
createGrid();
addNewTile();
addNewTile();
updateScore();
showGrid();
document.addEventListener("keydown", function(event) {
if (!gameover) {
switch (event.keyCode) {
case 37: // 左箭头
if (slideLeft()) {
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
}
break;
case 38: // 上箭头
gameboard = rotateLeft(gameboard);
gameboard = rotateLeft(gameboard);
gameboard = rotateLeft(gameboard);
if (slideLeft()) {
gameboard = rotateRight(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = rotateRight(gameboard);
}
break;
case 39: // 右箭头
gameboard = flipGrid(gameboard);
if (slideLeft()) {
gameboard = flipGrid(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = flipGrid(gameboard);
}
break;
case 40: // 下箭头
gameboard = rotateRight(gameboard);
if (slideLeft()) {
gameboard = rotateLeft(gameboard);
clearGrid();
showGrid();
addNewTile();
updateScore();
if (isWin()) {
document.getElementById("endgame").innerHTML = "You win!";
document.getElementById("endgame").style.display = "block";
gameover = true;
} else if (!canMove()) {
document.getElementById("endgame").innerHTML = "Game over!";
document.getElementById("endgame").style.display = "block";
gameover = true;
}
} else {
gameboard = rotateLeft(gameboard);
}
break;
default:
break;
}
}
});
document.getElementById("newgame").addEventListener("click", function() {
gameover = false;
gameboard = [];
createGrid();
addNewTile();
addNewTile();
score = 0;
updateScore();
clearGrid();
showGrid();
document.getElementById("endgame").style.display = "none";
});
}
main();
```
此代码实现了方格的滑动、合并、更新分数、判断胜利和失败等基本逻辑,您可以根据需要进行修改和扩展。
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