3
从rasp.py返回的值是：第一个是我的传感器连接到树莓的数据，第二个是当前时间。这些值必须从我的Django应用程序视图发送到我的html文件，以显示曲线，但结果是空白页面。为什么我的Django应用程序返回空白页
rasp.py
#!/usr/bin/env python
from datetime import datetime, timedelta
futuredate = datetime.now() + timedelta(days=10)
def foo () :
i = 0
for i in range(0,19):
i += 1
tfile = open("/sys/bus/w1/devices/28-000007101990/w1_slave")
text = tfile.read()
tfile.close()
secondline = text.split("\n")[1]
temp = secondline.split(" ")[9]
temperature = float(temp[2:])
temperature = temperature/1000
mystr = str(temperature)
y = mystr.replace(",",".")
x = datetime.now() + timedelta(days=10)
return x,y
views.py
from django.shortcuts import render
from rasp import foo
import json
def index(request):
return render(request, 'index.html', {'t' : foo()})
index.html的剧本是在HTML
{% load staticfiles %}
<!DOCTYPE HTML>
<html>
<head>
\t \t <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
\t <title>Temperature sensor graph</title>
<!-- Core CSS - Include with every page -->
<link href="{% static 'css/bootstrap.min.css' %}" rel="stylesheet">
\t
\t
\t \t <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
\t \t <style type="text/css">
${demo.css}
\t \t </style>
\t \t <script type="text/javascript">
$(function() {
$(document).ready(function() {
Highcharts.setOptions({
global: {
useUTC: false
}
});
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function() {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function() {
series.addPoint([{{ t }}], true, true);
}, 3000);
}
}
},
title: {
text: 'Live temperature sensor values'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Sensor data',
data: (function() {
// generate an array of sensor data
var data = [],
time = (new Date()).getTime(),
i;
data.push({ {{ t }} }
return data;
}())
}]
});
});
});
\t \t </script>
\t </head>
\t <body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
{% if user.is_authenticated %}
<a class="navbar-brand" href="/accueil">Accueil </a>
<a class="navbar-brand" href="/aps">Graphe </a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Account
<span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
<a href="/mail">changer mail</a>
</li>
<li>
<a href="#">changer temps</a>
</li>
<li class="divider"></li>
<li>
<a href="/logout">Logout</a>
</li>
</ul>
</li>
</ul>
</div>
</nav>
{% else %}
<a class="navbar-brand" href="/accueil">Accueil </a>
<a class="navbar-brand" href="/aps">Graphe </a>
<a class="navbar-brand" href="/login">S'authentifier </a>
</div>
</nav>
{% endif %}
<!-- Core Scripts - Include with every page -->
<script src = "{% static 'js/jquery.min.js' %}"></script>
<script src = "{% static 'js/bootstrap.min.js' %}"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
\t </body>
</html><script type="text/javascript">
$(function() {
$(document).ready(function() {
Highcharts.setOptions({
global: {
useUTC: false
}
});
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function() {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function() {
var x = (new Date()).getTime(), // current time
y = {{ t }} ;
series.addPoint([x, y], true, true);
}, 3000);
}
}
},
title: {
text: 'Live temperature sensor values'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Sensor data',
data: (function() {
// generate an array of sensor data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -19; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: {{ t }}
});
}
return data;
}())
}]
});
});
});
\t \t </script>
请看看我的编辑问题我已经添加了我的旧html文件，我的for循环是在html中，而不是在rasp.py中，并且它呈现相同的数据，它返回一条线而不是曲线，但是当我更改它时。它返回一个空白页面 – bne
已更新，回答。旧的html似乎没有语法错误。但是你的rasp.py仍然只返回一个元组而不是元组列表。 – e4c5
是的，我不知道如何每3秒从锉刀发送数据到我的html，以便从我的传感器获取不同的数据 – bne