Python Flask：在表单之间传递相同的变量

时间：2018-07-23 19:37:54

标签： python flask

我是Flask的新手，我想构建一个简单的Web应用程序。现在看起来像这样：

您在文本框中输入一些文本，然后单击提交。当您单击提交时，结果如下：（假设我输入的句子是“这是测试”）

因此，它显示了一些结果（正/负），并且还可以选择将句子添加到数据集（平面文件）中，并带有标签（正或负，这就是为什么有2个按钮的原因）

问题：我正在努力将第一步中文本框中的输入文本（变量input_text）传递给需要输入文本的正/负按钮将其添加到平面文件中。

这是我到目前为止的代码。

Python Flask应用

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def index():
    return render_template('index.html')

@app.route('/process-data', methods=['GET', 'POST'])
def process_data():
    if request.method == 'GET':
        return render_template('index.html')

    if request.method == 'POST':        
        # if submit button is clicked
        if request.form['submit'] == 'Submit':
            # get the text from the form that was filled in
            input_text = request.form['text']

            # final result shown on the screen, hardcoded in this case because out of scope for my question
            final_result = "negative"

        if request.form['submit'] == 'Positive':
            f = open('dataset/dataset.tsv', 'a')
            f.write(input_text + '\t' + 'positive')

        # if negative button is clicked  
        if request.form['submit'] == 'Negative':
            f = open('dataset/dataset.tsv', 'a')
            f.write(input_text + '\t' + 'negative')

        # show the result on the page   
        return render_template('index.html', result=final_result, text=input_text)

index.html

<!doctype html>
<head>
    <title>Sentiment Analysis</title>
    <link rel="stylesheet" media="screen" href ="static/bootstrap.min.css">
    <link rel="stylesheet" href="static/bootstrap-theme.min.css">
    <meta name="viewport" content = "width=device-width, initial-scale=1.0">
</head>
<br/>
<div class="container">
    <form action="/process-data" method="post" role="form">
        <div class="form-group">
            <label for="text">Text:</label>
            <input type="text" class="form-control" name="text" placeholder="Input sentence here">
        </div>
        <input type="submit" name="submit" value="Submit" class="btn btn-success">
    </form>
    <br/>

    {% if result == 'positive' %}
    <div class="alert alert-success">
        Prediction from all models using majority vote: <strong>{{ result }}</strong>
    </div>
    {% elif result == 'negative' %}
    <div class="alert alert-danger">
        Prediction from all models using majority vote: <strong>{{ result }}</strong>
    </div>
    {% elif result == 'unknown' %}
    <div class="alert alert-warning">
        Prediction from all models using majority vote: <strong>{{ result }}</strong>
    </div>
    {% endif %} 

    {% if result == 'positive' or result == 'negative' or result == 'unknown' %}
        <h2>Add to dataset</h2>
        <form action="/process-data" method="post" role="form">
            <div class="form-group">
                <label for="add-dataset">Sentence:</label>
                {{ text }}
                <br/><label for "label">Label:</label>
                <input type="submit" name="submit" value="Positive" class="btn btn-success">
                &nbsp;<input type="submit" name="submit" value="Negative" class="btn btn-danger">
            </div>
        </form>
    {% endif %} 
</div>
</html>

0 个答案:

没有答案