如何从下一个代码的 html 页面上的烧瓶中的 python 代码获取数据

Question

我试图通过 Flask 从 HTML 页面上的“byp”和“yp1”获取数据，但我不能。

我也想在 html 页面中打印两个打印内容。

我试图定义一个新的路由页面并使用诸如 {{ byp }} 和 {{ yp1 }} 之类的 Jinja 命令导入，但没有奏效之前...

代码 100% 运行。

谁能帮我一个提示？

    import requests, json
    import datetime
    import time

@app.route('/bpay/' + token_urlsafe(12))
def getBitcoinPrice():
    URL = 'https://www.bitstamp.net/api/ticker/'
    try:
        r = requests.get(URL)
        priceFloat = float(json.loads(r.text)['last'])
        bp = getBitcoinPrice()
        yp = 12
        byp = yp / bp
        yp1 = bp * byp
        btc = '1F1tAaz5x1HUXrCNLbtMDqcw6o5GNn4xqX'

        return render_template('a/bpay.html', byp=byp, yp1=yp1, bp=bp)

    except requests.ConnectionError:
        print ('Error querying Bitstamp API')

所以，我正在尝试这段代码：

URL = os.popen("GET https://www.bitstamp.net/api/ticker/").read()
    for last in URL:
        r = requests.get(URL)
        pf = float(json.loads(r.text)['last'])
    bp = pf
    yp = 12
    byp = yp / bp
    yp1 = bp * byp

我收到了这个错误：

 Traceback (most recent call last):
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/flask_login/utils.py", line 228, in decorated_view
    return func(*args, **kwargs)
  File "/home/ubuntu/workspace/n1/app.py", line 1480, in btpay
    r = requests.get(URL)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/requests/api.py", line 72, in get
    return request('get', url, params=params, **kwargs)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/requests/api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/requests/sessions.py", line 508, in request
    resp = self.send(prep, **send_kwargs)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/requests/sessions.py", line 612, in send
    adapter = self.get_adapter(url=request.url)
  File "/opt/pyenv/versions/3.6.0/lib/python3.6/site-packages/requests/sessions.py", line 703, in get_adapter
    raise InvalidSchema("No connection adapters were found for '%s'" % url)
requests.exceptions.InvalidSchema: No connection adapters were found for '{"high": "8160.85000000", "last": "8099.47", "timestamp": "1523975088", "bid": "8093.02", "vwap": "8062.56", "volume": "7016.85906762", "low": "7938.78000000", "ask": "8099.47", "open": 8054.68}'

Answer 1

过去几个月我一直在练习烧瓶。我希望这可以帮助你。因为你是 Flask 的新手，所以我试图让它变得简单易懂。

使用 render_template 将你的路由函数与 html 模板连接起来（确保 html 模板在 templates 目录中。

后端

from flask import Flask, render_template

app = Flask(__name__)

@app.route('/test')
def test():
    text = 'Hello World'
    return render_template('test.html', text=text)

if __name__ == '__main__':
    app.jinja_env.auto_reload = True
    app.config['TEMPLATES_AUTO_RELOAD'] = True
    app.debug = True
    app.run(host='0.0.0.0', port=5000)

在 Jinja 模板中，打印来自后端的变量

{{ text }}