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如何将数据从flask发送到html模板

[英]How to send data from flask to html template

我有一个小应用程序,从用户那里获取输入,并根据它将数据显示在html上。 我必须从flask发送数据到html上显示但无法找到方法。 我遇到没有错误。

[更新]:Python脚本:

    from flask import Flask, render_template, request
    import random

    app = Flask(__name__, template_folder='templates')

    @app.route('/', methods=['GET','POST'])
    def samplefunction():
        if request.method == 'GET':
            return render_template('new.html')
        if request.mthod == 'POST':
            greetIn = ['hey', 'hi', 'hey there', 'hi there', 'hello', 'hola', 'yoo']
            byeIn = ['bye', 'see you later', 'catch you later', 'toodles']
            nameOut = ['my name is Fatty!!', 'Fatty is my name', 'you can call me Fatty', 'I go by the name of Fatty']
            greetOut = ['hey there!', 'hi!', 'hi there!', 'hey!']
            byeOut = ['bye bye', 'bye. see you later']

            human1 = request.form['human']

            if human1 in greetIn:
                bot = random.choice(greetOut)
                return render_template('new.html', bot=bot)
            else:
                bot = 'Sorry..no idea!!!'
                return render_template('new.html', bot=bot)

  if __name__ == "__main__":
     app.run(debug=True)

HTML代码:

<html>
  <head>
    <title>BOT</title>
    <script>
        var bot = {{ bot }}
    </script>
  </head>
  <body>
      <h1>Hello, type something to begin!</h1>
      <form method='post'>
        Human: <input type='text' name='human'><br>
        Bot: {{ bot }}<br>
        <input type="submit" name="action">
      </form>
  </body>
</html>

任何帮助,将不胜感激。

谢谢!

问题

由于初始return语句,函数samplefunction()总是呈现new.html而不包含变量。

def samplefunction():
    return render_template('new.html')

固定

你需要添加if request.method == 'GET': if request.method == 'POST':那么你的代码就可以了。 并通过@Harrison建议更改变量名称作为另一个答案: bot = random.choice(greetOut) not bot = random.choice(greetout)

更新的代码

def samplefunction():
    if request.method == 'GET':
        return render_template('new.html')
    if request.method == 'POST':
        greetIn = ['hey', 'hi', 'hey there', 'hi there', 'hello', 'hola', 'yoo']
        byeIn = ['bye', 'see you later', 'catch you later', 'toodles']
        nameOut = ['my name is Fatty!!', 'Fatty is my name', 'you can call me Fatty', 'I go by the name of Fatty']
        greetOut = ['hey there!', 'hi!', 'hi there!', 'hey!']
        byeOut = ['bye bye', 'bye. see you later']
        human1 = request.form['human']
        if human1 in greetIn:
            bot = random.choice(greetOut)
            return render_template('new.html', bot=bot)
        else:
            render_template('new.html')

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=8080, debug=True)

greetOut = ['hey there!', 'hi!', 'hi there!', 'hey!'] < - 问候0 ut

bot = random.choice(greetout) < - greet o ut

除此之外,你的模板看起来很好。 如果你纠正你的大写,它应该工作。


另外,不是强制性的,但您可以将Flask导入压缩成1行,如下所示: from flask import Flask, render_template, request

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