Insert Dash Barchart into a HTML page via Flask Framework - python

I'm trying to insert a barchart into my website which has been written in Flask. Here is what my app.py looks like:
from flask import Flask, render_template
app = Flask(__name__)
#app.route("/")
def index():
return render_template('index.html', title="Mainpage")
if __name__=='__main__':
app.run(debug=True)
Here is what my barchart looks like (chart.py):
# -*- coding: utf-8 -*-
import dash
import dash_core_components as dcc
import dash_html_components as html
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets)
app.layout = html.Div(children=[
dcc.Graph(
id='example-graph',
figure={
'data': [
{'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
{'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
],
}
)
])
if __name__ == '__main__':
app.run_server(debug=True)
And here is what my html looks like (index.html):
<!DOCTYPE html>
<html lang="en">
<title>W3.CSS Template</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lato">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Montserrat">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
body,h1,h2,h3,h4,h5,h6 {font-family: "Lato", sans-serif}
.w3-bar,h1,button {font-family: "Montserrat", sans-serif}
.fa-anchor,.fa-coffee {font-size:200px}
</style>
<body>
<!-- Navbar -->
<div class="w3-top">
<div class="w3-bar w3-red w3-card w3-left-align w3-large">
<a class="w3-bar-item w3-button w3-hide-medium w3-hide-large w3-right w3-padding-large w3-hover-white w3-large w3-red" href="javascript:void(0);" onclick="myFunction()" title="Toggle Navigation Menu"><i class="fa fa-bars"></i></a>
Home
Link 1
Link 2
Link 3
Link 4
</div>
<!-- Navbar on small screens -->
<div id="navDemo" class="w3-bar-block w3-white w3-hide w3-hide-large w3-hide-medium w3-large">
Link 1
Link 2
Link 3
Link 4
</div>
</div>
<!-- Header -->
<header class="w3-container w3-red w3-center" style="padding:128px 16px">
<h1 class="w3-margin w3-jumbo">START PAGE</h1>
<p class="w3-xlarge">Template by w3.css</p>
<button class="w3-button w3-black w3-padding-large w3-large w3-margin-top">Get Started</button>
</header>
<!-- First Grid -->
<div class="w3-row-padding w3-padding-64 w3-container">
<div class="w3-content">
<div class="w3-twothird">
<h1>Bar Chart</h1>
<h2>Insert bar chart here</h2>
</div>
</div>
</body>
</html>
I want a site where I can embed dash or seaborn or plotly or possibly d3 charts onto one page. With the dash chart, I'm hoping to make a site that looks something like this:
How would I go about doing this?
EDIT 1 05/04/19. Here is what my file structure looks like:

import dash
import dash_core_components as dcc
import dash_html_components as html
from flask import Flask, render_template
server = Flask(__name__)
#server.route('/name')
def name():
return render_template('index.html')
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
layout = """
<!DOCTYPE html>
<html lang="en">
<title>{%title%}</title>
{%favicon%}
{%metas%}
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lato">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Montserrat">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
{%css%}
<style>
body,h1,h2,h3,h4,h5,h6 {font-family: "Lato", sans-serif}
.w3-bar,h1,button {font-family: "Montserrat", sans-serif}
.fa-anchor,.fa-coffee {font-size:200px}
</style>
<body>
<!-- Navbar -->
<div class="w3-top">
<div class="w3-bar w3-red w3-card w3-left-align w3-large">
<a class="w3-bar-item w3-button w3-hide-medium w3-hide-large w3-right w3-padding-large w3-hover-white w3-large w3-red" href="javascript:void(0);" onclick="myFunction()" title="Toggle Navigation Menu"><i class="fa fa-bars"></i></a>
Home
Link 1
Link 2
Link 3
Link 4
</div>
<!-- Navbar on small screens -->
<div id="navDemo" class="w3-bar-block w3-white w3-hide w3-hide-large w3-hide-medium w3-large">
Link 1
Link 2
Link 3
Link 4
</div>
</div>
<!-- Header -->
<header class="w3-container w3-red w3-center" style="padding:128px 16px">
<h1 class="w3-margin w3-jumbo">START PAGE</h1>
<p class="w3-xlarge">Template by w3.css</p>
<button class="w3-button w3-black w3-padding-large w3-large w3-margin-top">Get Started</button>
</header>
<!-- First Grid -->
<div class="w3-row-padding w3-padding-64 w3-container">
<div class="w3-content">
<div class="w3-twothird">
<h1>Bar Chart</h1>
<h2>Insert bar chart here</h2>
{%app_entry%}
</div>
</div>
{%config%}
{%scripts%}
{%renderer%}
</body>
</html>
"""
app = dash.Dash(__name__, external_stylesheets=external_stylesheets, server=server, index_string=layout)
app.layout = html.Div(children=[
dcc.Graph(
id='example-graph',
figure={
'data': [
{'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
{'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
],
'layout': {
'title': 'Dash Data Visualization'
}
}
)
])
if __name__ == '__main__':
app.run_server(debug=True)

This is in no way the right way to do. But this might help you get thinking in the right direction or just get to think of some ideas? Take it with a grain of salt.
I am not sure what the best/correct way of doing it is but, here are two way I could think of. Either you generate/export a png of your chart and then insert it in your html. OR you could just generate your JavaScript for the graph dynamically and then insert it. So you would write out all the base code for you graph, and then just add the values for the bars.

Related

how to use ajax and flask return value?

How can I put the first value of the list in function make progress(i)? list is the value returned from flask!!
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Changing the Value of Bootstrap 4 Progress Bar Dynamically</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap#4.6.0/dist/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#4.6.0/dist/js/bootstrap.bundle.min.js"></script>
<style>
.bs-example{
margin: 20px;
}
</style>
</head>
<body>
<div class="bs-example">
<!-- Progress bar HTML -->
<div class="progress">
{{rist}}
<div class="progress-bar progress-bar-striped" style="min-width: 20px;"></div>
</div>
<form action="/list" method="POST">
<input type="hidden" name="ID" value="">
<input type="hidden" name="path" value="{{path}}">
</form>
<!-- jQuery Script -->
<script>
var i = rist;
function makeProgress(){
if(i < 100){
i = i + 1;
$(".progress-bar").css("width", i + "%").text(i + " %");
setTimeout("makeProgress()", 100);
}
// Wait for sometime before running this script again
else { document.forms[0].submit(); }
$.ajax({
type:'post',
async:'true',
url:'http://127.0.0.1:5000/ ',
data:{rist},
dataType: 'json',
success: function(data){rist
}
});
};
</script>
</div>
</body>
</html>
this is print(rist) // .py
list = [(h, e, dictionary[e]) for h, e in zip(category_name, category_id)]
x = []
for j in list:
x.append(j)
rist = str(100*(len(x) / len(list)))
print(rist)
1.1235955056179776
2.247191011235955
3.3707865168539324
4.49438202247191
5.617977528089887
6.741573033707865
7.865168539325842
8.98876404494382
10.112359550561797
11.235955056179774
12.359550561797752
13.48314606741573
14.606741573033707
15.730337078651685
16.853932584269664
17.97752808988764
19.101123595505616
20.224719101123593
21.34831460674157
22.47191011235955
23.595505617977526
24.719101123595504
25.842696629213485
26.96629213483146
28.08988764044944
29.213483146067414
30.337078651685395
31.46067415730337
32.58426966292135
33.70786516853933
34.831460674157306
35.95505617977528
37.07865168539326
38.20224719101123
39.325842696629216
40.44943820224719
41.57303370786517
42.69662921348314
43.82022471910113
44.9438202247191
46.06741573033708
47.19101123595505
48.31460674157304
49.43820224719101
50.56179775280899
51.68539325842697
52.80898876404494
53.93258426966292
55.0561797752809
56.17977528089888
57.30337078651685
58.42696629213483
59.55056179775281
60.67415730337079
61.79775280898876
62.92134831460674
64.04494382022472
65.1685393258427
66.29213483146067
67.41573033707866
68.53932584269663
69.66292134831461
70.78651685393258
71.91011235955057
73.03370786516854
74.15730337078652
75.28089887640449
76.40449438202246
77.52808988764045
78.65168539325843
79.7752808988764
80.89887640449437
82.02247191011236
83.14606741573034
84.26966292134831
85.39325842696628
86.51685393258427
87.64044943820225
88.76404494382022
89.8876404494382
91.01123595505618
92.13483146067416
93.25842696629213
94.3820224719101
95.50561797752809
96.62921348314607
97.75280898876404
98.87640449438202
100.0
and it is my flask code
from flask import Flask, render_template, request
from maratang import search
app = Flask(__name__)
#app.route('/')
def test():
return render_template('post.html')
#app.route('/progress', methods=['POST', 'GET'])
def loding():
global result, path, list, error
if request.method == 'POST':
result = request.form
path = request.form['path']
list, error, rist = search(path)
return render_template('progress.html', rist = rist)
#app.route('/list', methods=['POST'])
def post():
if request.method == 'POST':
print(list)
return render_template("result.html", result = result, list = list, error = error)
if __name__ == '__main__':
app.run()
I thought it was right, but there was an error, so I don't know what to do.

Plotly scatter isn't displayed by Flask

I have a plotly scatter, but it's not displayed by flask
I took it from examples from internet
Result of my work looks like that:
And here is my code:
plotly_test.py
from flask import Flask, render_template
import json
import plotly
from plotly import graph_objs as go
import numpy as np
app = Flask(__name__)
#app.route('/', methods=['GET', 'POST'])
def kek():
t = np.linspace(0, 10, 100)
fig = go.Figure()
fig.add_trace(go.Scatter(
x=t, y=np.sin(t),
name='sin',
mode='markers',
marker_color='rgba(152, 0, 0, .8)'
))
fig.add_trace(go.Scatter(
x=t, y=np.cos(t),
name='cos',
marker_color='rgba(255, 182, 193, .9)'
))
fig.update_traces(mode='markers', marker_line_width=2, marker_size=10)
fig.update_layout(title='Styled Scatter',
yaxis_zeroline=False, xaxis_zeroline=False)
data = [fig]
graphJSON = json.dumps(data, cls=plotly.utils.PlotlyJSONEncoder)
return render_template('test1.html', graphJSON=graphJSON)
if __name__ == '__main__':
app.run()
And my html with styles and script:
test1.html
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.header{
text-align: center;
background-color: rgb(136, 185, 229);
height: 70px;
line-height: 70px;
}
.chart{
margin-top: 30px;
text-align: center;
}
</style>
</head>
<body>
<div class="header">
<h2>
Plotly Chart Demo
</h2>
</div>
<div id="chart" class="chart">
</div>
</body>
<!-- D3.js -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<!-- Plotly.js -->
<script src="https://d14fo0winaifog.cloudfront.net/plotly-basic.js"></script>
<script type="text/javascript">
var graphs = {{ graphJSON|safe }};
Plotly.plot('chart', graphs, {});
</script>
</html>
Can you explain me what do I do wrong?
Scatter works good without flask, but it doesn't with it!
js concole
Put this in the head:
<script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
And delte this part:
<!-- D3.js -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<!-- Plotly.js -->
<script src="https://d14fo0winaifog.cloudfront.net/plotly-basic.js"></script>

Flask variables not showing up in HTML

I have a small flask app I am using it to:
Make an HTML page with a leaflet map
Take user input from the HTML page...
Run calculations on that input using certain python modules
Return those variable to JS functions in the page to populate the map
I cannot get ANYTHING but lat and lng to return into my HTML {{}} flask variables.
Here is my HTML page:
<!DOCTYPE html>
<html lang="en">
<html>
<head>
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.1/dist/leaflet.css"
integrity="sha512-Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ=="
crossorigin=""/>
<script src="https://unpkg.com/leaflet#1.3.1/dist/leaflet.js"
integrity="sha512-/Nsx9X4HebavoBvEBuyp3I7od5tA0UzAxs+j83KgC8PU0kgB4XiK4Lfe4y4cgBtaRJQEIFCW+oC506aPT2L1zw=="
crossorigin="">
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<title>Page Title</title>
<meta charset="utf-8"/>
<style>
#mapid { height: 300px; }
</style>
<body>
<form method="POST">
Latitude to PY: <input name="lat" id="lat"/>
<br/>
Longitude to PY: <input name="lng" id="lng"/>
<br/>
<button>Get data</button>
</form>
{% if lat1 != None and lng1 != None %}
{{lat1}},{{lng1}}
<script>
var lat1 = {{lat1}}
var lng1 = {{lng1}}
</script>
{% endif %}
{% if point != None %}
<p>{{point}}</p>
{% endif %}
{% if GeJ != None %}
{{GeJ}}
<script>
var GeJ = {{GeJ}}
</script>
{% endif %}
<div id="mapid"></div>
<script>
var mymap = L.map('mapid').setView([51.505, -0.09], 13);
L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', {
attribution: 'Map data © OpenStreetMap contributors, CC-BY-SA, Imagery © Mapbox',
maxZoom: 18,
id: 'mapbox.high-contrast',
accessToken: 'pk.eyJ1IjoiY2dyb3RoIiwiYSI6ImNqZ2w4bWY5dTFueG0zM2w0dTNkazI1aWEifQ.55SWFVBYzs08EqJHAa3AsQ'
}).addTo(mymap);
function zoomTo() {
mymap.panTo(new L.LatLng(lat1, lng1));
}
function addGJ(){
var myLayer = L.geoJson(GeJ).addTo(mymap);
}
window.onload = zoomTo();
window.onload = addGJ();
</script>
</body>
</html>
Here is my Flask Python code:
from flask import Flask, render_template, request, flash, redirect, url_for,jsonify
from forms import RegistrationForm
import json
import osmnx as ox
import networkx as nx
import matplotlib.pyplot as plt
from networkx.readwrite import json_graph
import pandas as pd
import mplleaflet
app = Flask(__name__)
app.config.update(dict(
SECRET_KEY="powerful secretkey",
WTF_CSRF_SECRET_KEY="a csrf secret key"
))
#app.route('/')
def my_form():
return render_template('map.html')
#app.route('/', methods=['GET', 'POST'])
def my_form_post():
lat = (request.form['lat'])
lng = (request.form['lng'])
lat = lat
lng = lng
point = (lat,lng)
G = ox.core.graph_from_point(point, distance = 500, network_type='walk')
fig, ax = ox.plot_graph(G)
GJ = mplleaflet.fig_to_geojson(fig=ax.figure)
#return lat, ",", lng
return render_template('map.html', lat1=lat, lng1=lng, GeJ=GJ, point="test_string")`
if __name__ == "__main__":
app.run(host='0.0.0.0',port=5000,debug=True)
The Flask app is working fine so the file structure is not a concern. I just cannot get any other variables to return into my HTML. I even tried making little string dummy variables other that the real ones. No Dice.
Thanks
You could try using the builtin none value http://jinja.pocoo.org/docs/templates/#none
Then do something like:
{% if lat1 is not none and lng1 is not none %}
<!DOCTYPE html>
<html lang="en">
<html>
<head>
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.1/dist/leaflet.css"
integrity="sha512-Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ=="
crossorigin=""/>
<script src="https://unpkg.com/leaflet#1.3.1/dist/leaflet.js"
integrity="sha512-/Nsx9X4HebavoBvEBuyp3I7od5tA0UzAxs+j83KgC8PU0kgB4XiK4Lfe4y4cgBtaRJQEIFCW+oC506aPT2L1zw=="
crossorigin="">
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<title>Page Title</title>
<meta charset="utf-8"/>
<style>
#mapid { height: 300px; }
</style>
<body>
<form method="POST">
Latitude to PY: <input name="lat" id="lat"/>
<br/>
Longitude to PY: <input name="lng" id="lng"/>
<br/>
<button>Get data</button>
</form>
{% if lat1 is not Null and lng1 is not Null %}
{{lat1}},{{lng1}}
<script>
var lat1 = {{lat1}}
var lng1 = {{lng1}}
</script>
{% endif %}
{% if point != None %}
<p>{{point}}</p>
{% endif %}
{% if GeJ != None %}
{{GeJ}}
<script>
var GeJ = {{GeJ}}
</script>
{% endif %}
<div id="mapid"></div>
<script>
var mymap = L.map('mapid').setView([51.505, -0.09], 13);
L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', {
attribution: 'Map data © OpenStreetMap contributors, CC-BY-SA, Imagery © Mapbox',
maxZoom: 18,
id: 'mapbox.high-contrast',
accessToken: 'pk.eyJ1IjoiY2dyb3RoIiwiYSI6ImNqZ2w4bWY5dTFueG0zM2w0dTNkazI1aWEifQ.55SWFVBYzs08EqJHAa3AsQ'
}).addTo(mymap);
function zoomTo() {
mymap.panTo(new L.LatLng(lat1, lng1));
}
function addGJ(){
var myLayer = L.geoJson(GeJ).addTo(mymap);
}
window.onload = zoomTo();
window.onload = addGJ();
</script>
</body>
</html>
It would help if you provided an example of what exactly happens when you pass all the values.
Otherwise, what according to me, could be causing the problem is that the 'Null' object in python is the singleton None. The best way to check things for "Noneness" is to use is not None or better still, something as simple as:
{%if lat%} {{lat}} {% endif %}
Also, can't you assign GeJ to the var GeJ within the div instead of putting a line of JS in an abrupt manner up there?
P.S. I wanted to add this as a comment, but don't have enough reputation. Apologies.

Python Transcrypt addEventListener

I have written a Python program for translation with Transcrypt to Javascript.
I can not get the addEventListener function to work. Any ideas?
Here is the code as dom7.py:
class TestSystem:
def __init__ (self):
self.text = 'Hello, DOM!'
self.para = 'A new paragraph'
self.textblock = 'This is an expandable text block.'
self.button1 = document.getElementById("button1")
self.button1.addEventListener('mousedown', self.pressed)
def insert(self):,
document.querySelector('output').innerText = self.text
# document.querySelector('test').innerText = "Test"+self.button1+":"
def pressed(self):
container = document.getElementById('textblock')
newElm = document.createElement('p')
newElm.innerText = self.para
container.appendChild(newElm)
testSystem = TestSystem()
And here follows the corresponding dom7.html for it:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="__javascript__/dom7.js"></script>
<title>Titel</title>
</head>
<body onload=dom7.testSystem.insert()>
<button id="button1">Click me</button><br>
<main>
<h1>DOM examples</h1>
<p>Testing DOM</p>
<p>
<output></output>
</p>
<p>
<test>Test String:</test>
</p>
<div id="textblock">
<p>This is an expandable text block.</p>
</div>
</main>
</body>
</html>
The problem is that your TestSystem constructor is called before the DOM tree is ready. There are three ways to deal with this, the last of which is the best.
The first way is to include your script after you populated your body:
class TestSystem:
def __init__ (self):
self.text = 'Hello, DOM!'
self.para = 'A new paragraph'
self.textblock = 'This is an expandable text block.'
self.button1 = document.getElementById("button1")
self.button1.addEventListener('mousedown', self.pressed)
def insert(self):
document.querySelector('output').innerText = self.text
# document.querySelector('test').innerText = "Test"+self.button1+":"
def pressed(self):
container = document.getElementById('textblock')
newElm = document.createElement('p')
newElm.innerText = self.para
container.appendChild(newElm)
testSystem = TestSystem()
and:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Titel</title>
</head>
<body onload=dom7.testSystem.insert()>
<button id="button1">Click me</button><br>
<main>
<h1>DOM examples</h1>
<p>
Testing DOM
</p>
<p>
<output></output>
</p>
<p>
<test>Test String:</test>
</p>
<div id="textblock">
<p>This is an expandable text block.</p>
</div>
<script src="__javascript__/dom7.js"></script>
</main>
</body>
</html>
Still your insert function may be called too early, so may not work.
The second way is to include the script at the beginning and call an initialization function to connect event handlers to the DOM:
class TestSystem:
def __init__ (self):
self.text = 'Hello, DOM!'
self.para = 'A new paragraph'
self.textblock = 'This is an expandable text block.'
self.button1 = document.getElementById("button1")
self.button1.addEventListener('mousedown', self.pressed)
def insert(self):
document.querySelector('output').innerText = self.text
# document.querySelector('test').innerText = "Test"+self.button1+":"
def pressed(self):
container = document.getElementById('textblock')
newElm = document.createElement('p')
newElm.innerText = self.para
container.appendChild(newElm)
def init ():
testSystem = TestSystem()
and:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="__javascript__/dom7.js"></script>
<title>Titel</title>
</head>
<body onload=dom7.testSystem.insert()>
<button id="button1">Click me</button><br>
<main>
<h1>DOM examples</h1>
<p>
Testing DOM
</p>
<p>
<output></output>
</p>
<p>
<test>Test String:</test>
</p>
<div id="textblock">
<p>This is an expandable text block.</p>
</div>
<script>dom7.init ();</script>
</main>
</body>
</html>
Still there is a possibility that some browsers call the initialization function before the page is loaded, although this is rare. In addition to this the insert method is again called too early.
Third and best way, to solve both problems, is to run your initialization after a page load event, and call insert after you create your testSystem, so e.g. in the initalization function:
class TestSystem:
def __init__ (self):
self.text = 'Hello, DOM!'
self.para = 'A new paragraph'
self.textblock = 'This is an expandable text block.'
self.button1 = document.getElementById("button1")
self.button1.addEventListener('mousedown', self.pressed)
def insert(self):
document.querySelector('output').innerHTML = self.text
# document.querySelector('test').innerText = "Test"+self.button1+":"
def pressed(self):
container = document.getElementById('textblock')
newElm = document.createElement('p')
newElm.innerText = self.para
container.appendChild(newElm)
def init ():
testSystem = TestSystem()
testSystem.insert ()
and:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="__javascript__/dom7.js"></script>
<title>Titel</title>
</head>
<body onload="dom7.init ();">
<button id="button1">Click me</button><br>
<main>
<h1>DOM examples</h1>
<p>
Testing DOM
</p>
<p>
<output></output>
</p>
<p>
<test>Test String:</test>
</p>
<div id="textblock">
<p>This is an expandable text block.</p>
</div>
</main>
</body>
</html>
I looked at your mondrian example in the tutorial section and I saw that there is also a very simple way to attach the addEventListener to a document after it has loaded. You can use the DOMContentLoaded attribute in the header of the html doc for doing so:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="__javascript__/addEventListener_example1.js"></script>
<script>document.addEventListener("DOMContentLoaded", addEventListener_example1.init)</script>
<title>Titel</title>
</head>
<body>
<button id="button1">Click me</button><br>
<main>
<h1>DOM examples</h1>
<p>
Testing DOM
</p>
<p>
<output></output>
</p>
<p>
<test>Test String:</test>
</p>
<div id="textblock">
<p>This is an expandable text block.</p>
</div>
</main>
</body>
</html>
and the code for addEventListener_example1.py would be:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
def init():
insert()
def insert():
document.querySelector('output').innerHTML = 'Hello, DOM!'
button1 = document.getElementById("button1")
button1.addEventListener('mousedown', pressed)
def pressed():
para = 'A new paragraph'
container = document.getElementById('textblock')
newElm = document.createElement('p')
newElm.innerText = para
container.appendChild(newElm)

How do you stop cherrypy custom tools used as decorators being applied to static files?

I'm trying to develop an app for Google App Engine using Cherrypy.
I'm using a custom tool to apply templates with. Part of the output is a html css stylesheet declaration. I can get cherrypy to find and load the css file no problem, the problem is the template gets applied to the css output.
Here's my code I'm using
import cherrypy
from lib.tools.template import HamlTool
engine = cherrypy.engine
from lib.plugin.template import MakoTemplatePlugin
engine.mako = MakoTemplatePlugin(engine, os.path.join(os.path.dirname(__file__), 'templates'))
engine.mako.subscribe()
class Root(object):
exposed = True
#tools.encode()
#tools.template(template='index.haml')
def GET(self):
return 'Hello I like CherryPy!'
cherrypy.tools.template = HamlTool()
conf = {
'/': {
'request.dispatch': cherrypy.dispatch.MethodDispatcher(),
'tools.sessions.on': True,
},
'/assets/css/bootstrap-responsive.min.css' : {
'tools.staticfile.on': True,
'tools.staticfile.filename' : os.path.join(os.path.dirname(__file__), 'assets/css/bootstrap-responsive.min.css')
}
}
root = Root()
app = cherrypy.tree.mount(root, '/', config=conf)
run_wsgi_app(app)
This is the HamlTool code
import cherrypy
import haml
import mako.lookup
class HamlTool(cherrypy.Tool):
def __init__(self):
cherrypy.Tool.__init__(self, 'before_finalize',
self._render,
priority=0)
def _render(self, template=None):
if cherrypy.response.status > 399:
return
# retrieve the data returned by the handler
data = {'data':''.join(cherrypy.response.body), 'title': 'Hello there'} or {}
try:
template = cherrypy.engine.publish("lookup-template", template).pop()
except:
template = None
print
print 'template: ', template
if template:
# dump the template using the dictionary
cherrypy.response.body = str(template.render(**data))
And the MakoTemplatePlugin code
from cherrypy.process import plugins
import mako.lookup
import haml
class MakoTemplatePlugin(plugins.SimplePlugin):
def __init__(self, engine, template_dir='templates'):
super(MakoTemplatePlugin, self).__init__(engine)
self.template_dir = template_dir
print 'MakoTemplatePlugin: init', self.template_dir
self.lookup = mako.lookup.TemplateLookup(
directories=self.template_dir,
preprocessor=haml.preprocessor
)
self.bus.subscribe('lookup-template', self.get_template)
def start(self):
print 'MakoTemplatePlugin: start', self.template_dir
self.lookup = mako.lookup.TemplateLookup(
directories=self.template_dir,
preprocessor=haml.preprocessor
)
self.bus.subscribe('lookup-template', self.get_template)
def stop(self):
self.bus.unsubscribe('lookup-template', self.get_template)
self.lookup = None
def get_template(self, name):
print 'MakoTemplatePlugin: lookup template', name, self.template_dir
return self.lookup.get_template(name)
The base template
!!! 5
%html(lang="en")
%head
%title= title
%meta(name="viewport", content="width=device-width, initial-scale=1.0")
%link(href="/assets/css/bootstrap-responsive.min.css", rel="stylesheet")
%body
.container-fluid=self.body()
%script(src="http://code.jquery.com/jquery.js")
%script(src="/assets/js/bootstrap-responsive.min.js")
The actual template which inherits from base
<%inherit file="base.haml"/>
.row-fluid
.span12-fluid=data
The output from the root is fine
<!DOCTYPE html>
<html lang="en">
<head>
<title>Hello there</title>
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<link href="/assets/css/bootstrap-responsive.min.css" rel="stylesheet" />
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12-fluid">Hello I like CherryPy!</div>
</div>
</div>
<script src="http://code.jquery.com/jquery.js"></script>
<script src="/assets/js/bootstrap-responsive.min.js"></script>
</body>
</html>
but when you have a look at the output from the css you get
<!DOCTYPE html>
<html lang="en">
<head>
<title>Hello there</title>
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<link href="/assets/css/bootstrap-responsive.min.css" rel="stylesheet" />
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12-fluid">/*!
* Bootstrap Responsive v2.3.1
*
* Copyright 2012 Twitter, Inc
* Licensed under the Apache License v2.0
* http://www.apache.org/licenses/LICENSE-2.0
*
* Designed and built with all the love in the world #twitter by #mdo and #fat.
*/.clearfix{*zoom:1}.clearfix:before,.clearfix:after{display:table;line-height:0;content:""}.clearfix:after{clear:both}.hide-text{font:0/0 a;color:transparent;text-shadow:none;background-color:transparent;border:0}.input-block-level{display:block;width:100%;min-height:30px;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}#-ms-viewport{width:device-width}.hidden{display:none;visibility:hidden}.visible-phone{display:none!important}.visible-tablet{display:none!important}.hidden-desktop{display:none!important}.visible-desktop{display:inherit!important}#media(min-width:768px) and (max-width:979px){.hidden-desktop{display:inherit!important}.visible-desktop{display:none!important}.visible-tablet{display:inherit!important}.hidden-tablet{display:none!important}}#media(max-width:767px){.hidden-desktop{display:inherit!important}.visible-desktop{display:none!important}.visible-phone{display:inherit!important}.hidden-phone{display:none!important}}.visible-print{display:none!important}#media print{.visible-print{display:inherit!important}.hidden-print{display:none!important}}#media(min-width:1200px){.row{margin-left:-30px;*zoom:1}.row:before,.row:after{display:table;line-height:0;content:""}.row:after{clear:both}[class*="span"]{float:left;min-height:1px;margin-left:30px}.container,.navbar-static-top .container,.navbar-fixed-top .container,.navbar-fixed-bottom .container{width:1170px}.span12{width:1170px}.span11{width:1070px}.span10{width:970px}.span9{width:870px}.span8{width:770px}.span7{width:670px}.span6{width:570px}.span5{width:470px}.span4{width:370px}.span3{width:270px}.span2{width:170px}.span1{width:70px}.offset12{margin-left:1230px}.offset11{margin-left:1130px}.offset10{margin-left:1030px}.offset9{margin-left:930px}.offset8{margin-left:830px}.offset7{margin-left:730px}.offset6{margin-left:630px}.offset5{margin-left:530px}.offset4{margin-left:430px}.offset3{margin-left:330px}.offset2{margin-left:230px}.offset1{margin-left:130px}.row-fluid{width:100%;*zoom:1}.row-fluid:before,.row-fluid:after{display:table;line-height:0;content:""}.row-fluid:after{clear:both}.row-fluid [class*="span"]{display:block;float:left;width:100%;min-height:30px;margin-left:2.564102564102564%;*margin-left:2.5109110747408616%;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}.row-fluid [class*="span"]:first-child{margin-left:0}.row-fluid .controls-row [class*="span"]+[class*="span"]{margin-left:2.564102564102564%}.row-fluid .span12{width:100%;*width:99.94680851063829%}.row-fluid .span11{width:91.45299145299145%;*width:91.39979996362975%}.row-fluid .span10{width:82.90598290598291%;*width:82.8527914166212%}.row-fluid .span9{width:74.35897435897436%;*width:74.30578286961266%}.row-fluid .span8{width:65.81196581196582%;*width:65.75877432260411%}.row-fluid .span7{width:57.26495726495726%;*width:57.21176577559556%}.row-fluid .span6{width:48.717948717948715%;*width:48.664757228587014%}.row-fluid .span5{width:40.17094017094017%;*width:40.11774868157847%}.row-fluid .span4{width:31.623931623931625%;*width:31.570740134569924%}.row-fluid .span3{width:23.076923076923077%;*width:23.023731587561375%}.row-fluid .span2{width:14.52991452991453%;*width:14.476723040552828%}.row-fluid .span1{width:5.982905982905983%;*width:5.929714493544281%}.row-fluid .offset12{margin-left:105.12820512820512%;*margin-left:105.02182214948171%}.row-fluid .offset12:first-child{margin-left:102.56410256410257%;*margin-left:102.45771958537915%}.row-fluid .offset11{margin-left:96.58119658119658%;*margin-left:96.47481360247316%}.row-fluid .offset11:first-child{margin-left:94.01709401709402%;*margin-left:93.91071103837061%}.row-fluid .offset10{margin-left:88.03418803418803%;*margin-left:87.92780505546462%}.row-fluid .offset10:first-child{margin-left:85.47008547008548%;*margin-left:85.36370249136206%}.row-fluid .offset9{margin-left:79.48717948717949%;*margin-left:79.38079650845607%}.row-fluid .offset9:first-child{margin-left:76.92307692307693%;*margin-left:76.81669394435352%}.row-fluid .offset8{margin-left:70.94017094017094%;*margin-left:70.83378796144753%}.row-fluid .offset8:first-child{margin-left:68.37606837606839%;*margin-left:68.26968539734497%}.row-fluid .offset7{margin-left:62.393162393162385%;*margin-left:62.28677941443899%}.row-fluid .offset7:first-child{margin-left:59.82905982905982%;*margin-left:59.72267685033642%}.row-fluid .offset6{margin-left:53.84615384615384%;*margin-left:53.739770867430444%}.row-fluid .offset6:first-child{margin-left:51.28205128205128%;*margin-left:51.175668303327875%}.row-fluid .offset5{margin-left:45.299145299145295%;*margin-left:45.1927623204219%}.row-fluid .offset5:first-child{margin-left:42.73504273504273%;*margin-left:42.62865975631933%}.row-fluid .offset4{margin-left:36.75213675213675%;*margin-left:36.645753773413354%}.row-fluid .offset4:first-child{margin-left:34.18803418803419%;*margin-left:34.081651209310785%}.row-fluid .offset3{margin-left:28.205128205128204%;*margin-left:28.0987452264048%}.row-fluid .offset3:first-child{margin-left:25.641025641025642%;*margin-left:25.53464266230224%}.row-fluid .offset2{margin-left:19.65811965811966%;*margin-left:19.551736679396257%}.row-fluid .offset2:first-child{margin-left:17.094017094017094%;*margin-left:16.98763411529369%}.row-fluid .offset1{margin-left:11.11111111111111%;*margin-left:11.004728132387708%}.row-fluid .offset1:first-child{margin-left:8.547008547008547%;*margin-left:8.440625568285142%}input,textarea,.uneditable-input{margin-left:0}.controls-row [class*="span"]+[class*="span"]{margin-left:30px}input.span12,textarea.span12,.uneditable-input.span12{width:1156px}input.span11,textarea.span11,.uneditable-input.span11{width:1056px}input.span10,textarea.span10,.uneditable-input.span10{width:956px}input.span9,textarea.span9,.uneditable-input.span9{width:856px}input.span8,textarea.span8,.uneditable-input.span8{width:756px}input.span7,textarea.span7,.uneditable-input.span7{width:656px}input.span6,textarea.span6,.uneditable-input.span6{width:556px}input.span5,textarea.span5,.uneditable-input.span5{width:456px}input.span4,textarea.span4,.uneditable-input.span4{width:356px}input.span3,textarea.span3,.uneditable-input.span3{width:256px}input.span2,textarea.span2,.uneditable-input.span2{width:156px}input.span1,textarea.span1,.uneditable-input.span1{width:56px}.thumbnails{margin-left:-30px}.thumbnails>li{margin-left:30px}.row-fluid .thumbnails{margin-left:0}}#media(min-width:768px) and (max-width:979px){.row{margin-left:-20px;*zoom:1}.row:before,.row:after{display:table;line-height:0;content:""}.row:after{clear:both}[class*="span"]{float:left;min-height:1px;margin-left:20px}.container,.navbar-static-top .container,.navbar-fixed-top .container,.navbar-fixed-bottom .container{width:724px}.span12{width:724px}.span11{width:662px}.span10{width:600px}.span9{width:538px}.span8{width:476px}.span7{width:414px}.span6{width:352px}.span5{width:290px}.span4{width:228px}.span3{width:166px}.span2{width:104px}.span1{width:42px}.offset12{margin-left:764px}.offset11{margin-left:702px}.offset10{margin-left:640px}.offset9{margin-left:578px}.offset8{margin-left:516px}.offset7{margin-left:454px}.offset6{margin-left:392px}.offset5{margin-left:330px}.offset4{margin-left:268px}.offset3{margin-left:206px}.offset2{margin-left:144px}.offset1{margin-left:82px}.row-fluid{width:100%;*zoom:1}.row-fluid:before,.row-fluid:after{display:table;line-height:0;content:""}.row-fluid:after{clear:both}.row-fluid [class*="span"]{display:block;float:left;width:100%;min-height:30px;margin-left:2.7624309392265194%;*margin-left:2.709239449864817%;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}.row-fluid [class*="span"]:first-child{margin-left:0}.row-fluid .controls-row [class*="span"]+[class*="span"]{margin-left:2.7624309392265194%}.row-fluid .span12{width:100%;*width:99.94680851063829%}.row-fluid .span11{width:91.43646408839778%;*width:91.38327259903608%}.row-fluid .span10{width:82.87292817679558%;*width:82.81973668743387%}.row-fluid .span9{width:74.30939226519337%;*width:74.25620077583166%}.row-fluid .span8{width:65.74585635359117%;*width:65.69266486422946%}.row-fluid .span7{width:57.18232044198895%;*width:57.12912895262725%}.row-fluid .span6{width:48.61878453038674%;*width:48.56559304102504%}.row-fluid .span5{width:40.05524861878453%;*width:40.00205712942283%}.row-fluid .span4{width:31.491712707182323%;*width:31.43852121782062%}.row-fluid .span3{width:22.92817679558011%;*width:22.87498530621841%}.row-fluid .span2{width:14.3646408839779%;*width:14.311449394616199%}.row-fluid .span1{width:5.801104972375691%;*width:5.747913483013988%}.row-fluid .offset12{margin-left:105.52486187845304%;*margin-left:105.41847889972962%}.row-fluid .offset12:first-child{margin-left:102.76243093922652%;*margin-left:102.6560479605031%}.row-fluid .offset11{margin-left:96.96132596685082%;*margin-left:96.8549429881274%}.row-fluid .offset11:first-child{margin-left:94.1988950276243%;*margin-left:94.09251204890089%}.row-fluid .offset10{margin-left:88.39779005524862%;*margin-left:88.2914070765252%}.row-fluid .offset10:first-child{margin-left:85.6353591160221%;*margin-left:85.52897613729868%}.row-fluid .offset9{margin-left:79.8342541436464%;*margin-left:79.72787116492299%}.row-fluid .offset9:first-child{margin-left:77.07182320441989%;*margin-left:76.96544022569647%}.row-fluid .offset8{margin-left:71.2707182320442%;*margin-left:71.16433525332079%}.row-fluid .offset8:first-child{margin-left:68.50828729281768%;*margin-left:68.40190431409427%}.row-fluid .offset7{margin-left:62.70718232044199%;*margin-left:62.600799341718584%}.row-fluid .offset7:first-child{margin-left:59.94475138121547%;*margin-left:59.838368402492065%}.row-fluid .offset6{margin-left:54.14364640883978%;*margin-left:54.037263430116376%}.row-fluid .offset6:first-child{margin-left:51.38121546961326%;*margin-left:51.27483249088986%}.row-fluid .offset5{margin-left:45.58011049723757%;*margin-left:45.47372751851417%}.row-fluid .offset5:first-child{margin-left:42.81767955801105%;*margin-left:42.71129657928765%}.row-fluid .offset4{margin-left:37.01657458563536%;*margin-left:36.91019160691196%}.row-fluid .offset4:first-child{margin-left:34.25414364640884%;*margin-left:34.14776066768544%}.row-fluid .offset3{margin-left:28.45303867403315%;*margin-left:28.346655695309746%}.row-fluid .offset3:first-child{margin-left:25.69060773480663%;*margin-left:25.584224756083227%}.row-fluid .offset2{margin-left:19.88950276243094%;*margin-left:19.783119783707537%}.row-fluid .offset2:first-child{margin-left:17.12707182320442%;*margin-left:17.02068884448102%}.row-fluid .offset1{margin-left:11.32596685082873%;*margin-left:11.219583872105325%}.row-fluid .offset1:first-child{margin-left:8.56353591160221%;*margin-left:8.457152932878806%}input,textarea,.uneditable-input{margin-left:0}.controls-row [class*="span"]+[class*="span"]{margin-left:20px}input.span12,textarea.span12,.uneditable-input.span12{width:710px}input.span11,textarea.span11,.uneditable-input.span11{width:648px}input.span10,textarea.span10,.uneditable-input.span10{width:586px}input.span9,textarea.span9,.uneditable-input.span9{width:524px}input.span8,textarea.span8,.uneditable-input.span8{width:462px}input.span7,textarea.span7,.uneditable-input.span7{width:400px}input.span6,textarea.span6,.uneditable-input.span6{width:338px}input.span5,textarea.span5,.uneditable-input.span5{width:276px}input.span4,textarea.span4,.uneditable-input.span4{width:214px}input.span3,textarea.span3,.uneditable-input.span3{width:152px}input.span2,textarea.span2,.uneditable-input.span2{width:90px}input.span1,textarea.span1,.uneditable-input.span1{width:28px}}#media(max-width:767px){body{padding-right:20px;padding-left:20px}.navbar-fixed-top,.navbar-fixed-bottom,.navbar-static-top{margin-right:-20px;margin-left:-20px}.container-fluid{padding:0}.dl-horizontal dt{float:none;width:auto;clear:none;text-align:left}.dl-horizontal dd{margin-left:0}.container{width:auto}.row-fluid{width:100%}.row,.thumbnails{margin-left:0}.thumbnails>li{float:none;margin-left:0}[class*="span"],.uneditable-input[class*="span"],.row-fluid [class*="span"]{display:block;float:none;width:100%;margin-left:0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}.span12,.row-fluid .span12{width:100%;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}.row-fluid [class*="offset"]:first-child{margin-left:0}.input-large,.input-xlarge,.input-xxlarge,input[class*="span"],select[class*="span"],textarea[class*="span"],.uneditable-input{display:block;width:100%;min-height:30px;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}.input-prepend input,.input-append input,.input-prepend input[class*="span"],.input-append input[class*="span"]{display:inline-block;width:auto}.controls-row [class*="span"]+[class*="span"]{margin-left:0}.modal{position:fixed;top:20px;right:20px;left:20px;width:auto;margin:0}.modal.fade{top:-100px}.modal.fade.in{top:20px}}#media(max-width:480px){.nav-collapse{-webkit-transform:translate3d(0,0,0)}.page-header h1 small{display:block;line-height:20px}input[type="checkbox"],input[type="radio"]{border:1px solid #ccc}.form-horizontal .control-label{float:none;width:auto;padding-top:0;text-align:left}.form-horizontal .controls{margin-left:0}.form-horizontal .control-list{padding-top:0}.form-horizontal .form-actions{padding-right:10px;padding-left:10px}.media .pull-left,.media .pull-right{display:block;float:none;margin-bottom:10px}.media-object{margin-right:0;margin-left:0}.modal{top:10px;right:10px;left:10px}.modal-header 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.dropdown-menu:after{display:none}.nav-collapse .dropdown-menu .divider{display:none}.nav-collapse .nav>li>.dropdown-menu:before,.nav-collapse .nav>li>.dropdown-menu:after{display:none}.nav-collapse .navbar-form,.nav-collapse .navbar-search{float:none;padding:10px 15px;margin:10px 0;border-top:1px solid #f2f2f2;border-bottom:1px solid #f2f2f2;-webkit-box-shadow:inset 0 1px 0 rgba(255,255,255,0.1),0 1px 0 rgba(255,255,255,0.1);-moz-box-shadow:inset 0 1px 0 rgba(255,255,255,0.1),0 1px 0 rgba(255,255,255,0.1);box-shadow:inset 0 1px 0 rgba(255,255,255,0.1),0 1px 0 rgba(255,255,255,0.1)}.navbar-inverse .nav-collapse .navbar-form,.navbar-inverse .nav-collapse .navbar-search{border-top-color:#111;border-bottom-color:#111}.navbar .nav-collapse .nav.pull-right{float:none;margin-left:0}.nav-collapse,.nav-collapse.collapse{height:0;overflow:hidden}.navbar .btn-navbar{display:block}.navbar-static 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</div>
</div>
</div>
<script src="http://code.jquery.com/jquery.js"></script>
<script src="/assets/js/bootstrap-responsive.min.js"></script>
</body>
</html>
What have I done wrong and how do I prevent the tenmplate from being applied to css and javascript files referenced by this page?
UPDATE:
I forgot to mention that I already tried disabling the template plugin on the static files by putting
'tools.template.on':False
in the static files part of the config. The only way I seem to be able to stop this is to remove the templates decorator all together. The only problem with that is the template will not be applied and the output will not include the html which includes the desired css import.
In your static sections, simply disable the tool:
tools.template.on: False

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