Question

我有一个小应用程序，从用户那里获取输入，并根据它在html上显示数据。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。

[增订]： 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 code：

<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>

任何帮助都将不胜感激。

谢谢！

Answer 1

<强>问题

由于初始返回语句，您的函数samplefunction()始终呈现new.html而不包含变量。

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

<强>修正

您需要添加if request.method == 'GET':和if request.method == 'POST':，然后您的代码才能生效。并按@Harrison建议更改变量名称作为另一个答案：bot = random.choice(greetOut)而非bot = random.choice(greetout)

更新代码

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)

Answer 2

greetOut = ['hey there!', 'hi!', 'hi there!', 'hey!']＆lt; - greet 0 ut

bot = random.choice(greetout)＆lt; - greet o ut

除此之外，你的模板看起来很好。如果你更正了大写，它应该有用。

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

如何将数据从flask发送到html模板

2 个答案: