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I would like to make a Pinterest Layout on my Feed?

0
I am triying to make my Feed Page for my Social Media Website look cool. Right now the Feed shows the Posts (Images and Videos) one below each other, like Instagram f. e. I want to have 2 Posts next to each other, like Pinterest f. e.
[what I want (click to see)] https://i.stack.imgur.com/KBGNg.png
I code my Webiste with HTML, CSS and PYTHON.
feed.html
<article class="content-section" style="overflow: auto;">
<div class="mediacontent">
{% if post.extension == '.mp4'%}
<video loop class="video-context" width="500px" height="500px" controls>
<source src="{{ post.file.url }}" type="video/mp4">
</video>
{% elif post.extension == '.jpg' or post.extension == '.jpeg' %}
<a href="{% url 'post-detail' post.id %}">
<img class="image-context" src="{{ post.file.url }}">
</a>
{% endif %}
</div>
<div class="initials">
<div class="media">
<div class="img-cont3">
<img class="rounded-circle article-img feed-pic" src="{{post.author.profile.image.url}}" alt="image">
</div>
<div class="media-body">
<span><a class="mr-2 full-name-link" href="{% url 'profile-detail-view' post.author.pk %}">{{ post.author.first_name }} {{ post.author.last_name }} </a></span>
<span><small class="text-muted at-username">w/{{ post.author }}</small></span>
</div>
</div>
</div>
<script>
var videos = document.querySelectorAll('video');
for(var i=0; i<videos.length; i++)
videos[i].addEventListener('play', function(){pauseAll(this)}, true);
function pauseAll(elem){
for(var i=0; i<videos.length; i++){
//Is this the one we want to play?
if(videos[i] == elem) continue;
//Have we already played it && is it already paused?
if(videos[i].played.length > 0 && !videos[i].paused){
// Then pause it now
videos[i].pause();
}
}
}
</script>
<br>
<h3 class="article-title">{{ post.title }}</h3>
<a href="{% url 'post-detail' post.id %}">
<p class="interactions">{{post.total_likes}} <span>Likes</span></p></a>
</article>
style.css
.media {
height: 55px;
}
.media-body span{
display: block;
margin-top: -3px;
}
body {
overflow-x: hidden;
}
.like-info {
font-size: 15px;
font-family: 'Inter', sans-serif;
color: #535353;
font-weight: 500;
}
.article-title span {
font-size: 14px;
font-family: 'Inter', sans-serif;
color: #000;
font-weight: 500;
}
.article-title span:hover {
text-decoration: none;
}
.article-title {
font-size: 14px;
font-family: 'Inter', sans-serif;
color: #535353;
font-weight: 400;
}
.interactions {
color: #000;
font-family: 'Inter', sans-serif;
font-size: 14px;
font-weight: 600;
}
.interactions span{
font-family: 'Inter', sans-serif, sans-serif;
color: #535353;
font-weight: 500;
}
.content-section {
background-color: #FAFAFA;
border: 1px #9d9d9d dashed;
border-radius: 10px;
}
.content-section-upload {
background-color: #FAFAFA;
border-radius: 10px;
border: none;
padding-right: -10px;
padding-left: -10px;
padding-bottom: -60px;
padding-top: -60px;
}
.create-section {
width: 100%;
}
.image-context {
display: grid;
width: 100%;
height: auto;
margin: auto;
border-radius: 20px;
text-align: center;
cursor: pointer;
}
.video-context {
display: grid;
width: 100%;
height: auto;
margin: auto;
background-color: #000;
border-radius: 20px;
text-align: center;
max-height: 450px;
cursor: pointer;
}
an more Styles that is not related to the main issue.
Is it possible to grid 2 Posts next to each other?

<!-- demo for pinterest like layout with responsiveness -->
**HTML:**
<div class="app">
<div class="feed">
<img src="" />
<!-- More images -->
</div>
</div>
**css:**
.app{
width: 80vw;
margin: auto;
}
.feed{
column: 4 12rem; /* 1st one is column count and second one is width */
}

How do I add image to html email background?

I am trying to create an automated email script for birthdays. However i can send the text email with an image as an attachment but I want the image to be in the background of the text. Like how it is when you open some websites this is a birthday email style that I'm trying to clone. I've got all the other things setup but when i test it, the background image does not appear. Just text box box
this is the code I wrote: I'm not that good a programmer to be sincere. And the ~ in there so that a function will read the html file and replace the ~ with my message[the wish].
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="with=device-with, initial-scale=1.0">
<style>
*
{
margin: 0;
padding: 0;
font-family: 'Poppins', sans-serif;
}
.header
{
background-image: url('birthday.png');
background-repeat: repeat-y no-repeat;
background-color: #333;
min-height: 100vh;
width: 100%;
background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)), url =("/images/birthday.png");
background-position: center;
background-size: cover;
position: relative;
}
.text-box
{
color:;
background: transparent;
position: absolute;
background-color: aliceblue;
width: auto;
height: auto;
margin: 5% 5%;
border-radius: 10px;
padding: 0px;
}
.tin-line
{
position: relative;
top: 10%;
background-color: cornflowerblue;
width: 100%;
height: 10px;
border-radius: 1px;
}
.message-box
{
position: relative;
top: 13%;
padding: 10px;
}
p
{
font-family: cursive;
font-size: 15px;
font-weight: 600;
text-align: center;
color: black;
}
.last
{
position: relative;
bottom: 5%;
padding: 10px;
font-family: cursive;
font-size: 20px;
font-weight: 700;
}
.head
{
position: relative;
top: 5%;
height: 50px;
width: 100%;
margin: auto;
text-align: center;
font-family: cursive;
}
</style>
</head>
<body>
<section class="header">
<div class="text-box">
<div class="head"><h1>✨HAPPY BIRTHDAY!✨</h1></div>
<div class="tin-line">
</div>
<div class="message-box"><br>
<p>~</p>
</div>
<div class="last">
<p>Best wishes,<br> Dillon</p>
</div>
</div>
</section>
</body>
</html>
This is the output:
Results of email output

There's some advice at backgrounds.cm which may help. Wrap your message in a table and apply the background to a cell. Note that there's two places the image url is defined:
<div style="background-color:#7bceeb;">
<!--[if gte mso 9]>
<v:background xmlns:v="urn:schemas-microsoft-com:vml" fill="t">
<v:fill type="tile" src="https://i.imgur.com/YJOX1PC.png" color="#7bceeb"/>
</v:background>
<![endif]-->
<table height="100%" width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td valign="top" align="left" background="https://i.imgur.com/YJOX1PC.png">
Your message here
</td>
</tr>
</table>
</div>
If you're wanting to attach the image then you'll need to use Content-Disposition: inline & Content-ID: headers for the attachment and refer to the image using a cid: link.

django contrib message appearing behind my input instead on top

I have a contrib message that appear when the user login information is not valid!
messages.info(request, "Sorry, your password was incorrect.")
but the problem is that the pessage pop behind my input(So we can't clearly see the message) , I want to make it appear on top on my Login input....I tried to change the code position of the {{ message }} on my html files but it didn't worked. Maybe the problem is on my css files? Thanks for helping....
login.html
{% load static %}
<link rel="stylesheet" href="{% static "test.css" %}">
<head>
<div class="container">
<div class="col-md-8">
{% if messages %}
{% for message in messages %}
<div class="alert alert-{{ message.tags }}">
{{ message }}
</div>
{% endfor %}
{% endif %}
</div>
</div>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!-- Include the above in your HEAD tag -->
</head>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<div class="main">
<div class="container">
<center>
<div class="middle">
<div id="login">
<form action="" method="post">
{% csrf_token %}
<fieldset class="clearfix">
<p ><span class="fa fa-user"></span><input type="text" name="username" Placeholder="Username" required></p> <!-- JS because of IE support; better: placeholder="Username" -->
<p><span class="fa fa-lock"></span><input type="password" name="password" Placeholder="Password" required></p> <!-- JS because of IE support; better: placeholder="Password" -->
<div>
<span style="width:48%; text-align:left; display: inline-block;"><a class="small-text" href="#">Forgot
password?</a></span>
<span style="width:50%; text-align:right; display: inline-block;"><input type="submit" value="Sign In"></span>
</div>
</fieldset>
<div class="clearfix"></div>
</div> <!-- end login -->
<div>
<img src = "https://i.imgur.com/Ozr5pDW.png">
<div class="clearfix"></div>
</div>
</div>
</center>
</div>
</div>
test.css
#charset "utf-8";
#import url//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css);
div.main{
background: #0264d6; /* Old browsers */
background: -moz-radial-gradient(center, ellipse cover, #0264d6 1%, #1c2b5a 100%); /* FF3.6+ */
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(1%,#0264d6), color-stop(100%,#1c2b5a)); /* Chrome,Safari4+ */
background: -webkit-radial-gradient(center, ellipse cover, #0264d6 1%,#1c2b5a 100%); /* Chrome10+,Safari5.1+ */
background: -o-radial-gradient(center, ellipse cover, #0264d6 1%,#1c2b5a 100%); /* Opera 12+ */
background: -ms-radial-gradient(center, ellipse cover, #0264d6 1%,#1c2b5a 100%); /* IE10+ */
background: radial-gradient(ellipse at center, #0264d6 1%,#1c2b5a 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#0264d6', endColorstr='#1c2b5a',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
height:calc(100vh);
width:100%;
}
[class*="fontawesome-"]:before {
font-family: 'FontAwesome', sans-serif;
}
/* ---------- GENERAL ---------- */
* {
box-sizing: border-box;
margin:0px auto;
&:before,
&:after {
box-sizing: border-box;
}
}
body {
color: #606468;
font: 87.5%/1.5em 'Open Sans', sans-serif;
margin: 0;
}
a {
color: #eee;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
input {
border: none;
font-family: 'Open Sans', Arial, sans-serif;
font-size: 14px;
line-height: 1.5em;
padding: 0;
-webkit-appearance: none;
}
p {
line-height: 1.5em;
}
.clearfix {
*zoom: 1;
&:before,
&:after {
content: ' ';
display: table;
}
&:after {
clear: both;
}
}
.container {
left: 50%;
position: fixed;
top: 50%;
transform: translate(-50%, -50%);
}
/* ---------- LOGIN ---------- */
#login form{
width: 250px;
}
#login, .logo{
display:inline-block;
width:40%;
}
#login{
border-right:1px solid #fff;
padding: 0px 22px;
width: 59%;
}
.logo{
color:#fff;
font-size:50px;
line-height: 125px;
}
#login form span.fa {
background-color: #fff;
border-radius: 3px 0px 0px 3px;
color: #000;
display: block;
float: left;
height: 50px;
font-size:24px;
line-height: 50px;
text-align: center;
width: 50px;
}
#login form input {
height: 50px;
}
fieldset{
padding:0;
border:0;
margin: 0;
}
#login form input[type="text"], input[type="password"] {
background-color: #fff;
border-radius: 0px 3px 3px 0px;
color: #000;
margin-bottom: 1em;
padding: 0 16px;
width: 200px;
}
#login form input[type="submit"] {
border-radius: 3px;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
background-color: #000000;
color: #eee;
font-weight: bold;
/* margin-bottom: 2em; */
text-transform: uppercase;
padding: 5px 10px;
height: 30px;
}
#login form input[type="submit"]:hover {
background-color: #d44179;
}
#login > p {
text-align: center;
}
#login > p span {
padding-left: 5px;
}
.middle {
display: flex;
width: 600px;
}

redirection in html failed

I have a html:
{% load staticfiles %}
<div style="margin:0 auto; width:900px">
<ul id="nav">
<li id="notification_li">
<a href="#" id="notificationLink">
<div id="notify"> <img src="{% static "images/notification.png" %}" width="20" height="20" />
{% if unseen_notifications.count > 0 %}
<span id="notification_count">
{{unseen_notifications.count}}</span>
{% endif %}
</div></a>
<div id="notificationContainer">
<div id="notificationTitle">Inbox</div>
<div id="notificationsBody">
Home
</div>
<div id="notificationFooter">See All</div>
</div>
</li>
</ul>
</div>
Here I have "Home" inside id "notificationContainer". When I click Home it doesnt redirect but outside "notificationContainer" it redirects. Inside notification container I am willing to put notifications. But it doesnt redirect.
My style for this:
#notification_li{position:relative}
#notificationContainer {
background-color: #FFF;
border: 1px solid rgba(100, 100, 100, .4);
-webkit-box-shadow: 0 3px 8px rgba(0, 0, 0, .25);
overflow: visible;
position: absolute;
top: 30px;
margin-left: -170px;
width: 400px;
z-index: 11;
display: none;
}
#notificationContainer:before {
content: '';
display: block;
position: absolute;
width: 0;
height: 0;
border: 10px;
margin-top: -20px;
margin-left: 188px;
}
#notificationTitle {
z-index: 1000;
font-weight: bold;
padding: 8px;
font-size: 15px;
background-color: #ffffff;
width: 384px;
border-bottom: 1px solid #dddddd;
}
#notificationsBody {
padding: 0px 0px 0px 0px !important;
margin: 0px;
min-height:300px;
font-size:14px;
display: block;
}
#notificationsBody a{ color: #000;}
#notification_count {
padding: 3px 7px 3px 7px;
background: #cc0000;
color: #ffffff;
font-weight: bold;
margin-left: 0px;
border-radius: 20px;
position: absolute;
margin-top: -7px;
font-size: 11px;
}
#notificationFooter {
background-color: #e9eaed;
text-align: center;
font-weight: bold;
padding: 8px;
font-size: 12px;
border-top: 1px solid #dddddd;
}

You need to define a URL in your urls.py
and if you want to use it like this <a href="{% url "ask_question" %}"> then add a name to your url and use it like this <a href="{% url "home" %}">
if your home has a view then:
url(r'^people/', "myapp.views.people", name="people"),
if it is only a template you can use something like this:
url(r'^home/',TemplateView.as_view(template_name="homepage.html"), name="home"),

I think you misunderstood Ebtessam's answer. Not only do you need to configure the URL, you also need to reference that URL correctly in the HTML.
You have:
Home
Change to:
Home
The above assumes that within your URL you defined something that looks similar to:
url(r'^home/',views.your_home_view_here, name="home"),
Notice the name="home".In your template you reference the view with that name, hence:
{% url 'home' %}

How to call web service which is developed in Python's ladon framework from iOS app?

The web services are built on Python's Ladon framework.
Web Service URL is: http://ladonize.org/python-demos/Calculator
The code for calling web service is as below :
NSString *requestString = [NSString stringWithFormat:
#"http://ladonize.org/python-demos/Calculator"];
NSString *jsonString = [NSString stringWithFormat:#"{\"methodname\":\"add\",\"args\": {\"a\":\"123\",\"b\":\"123\"}}"];
NSData *jsonData = [NSData dataWithBytes: [jsonString UTF8String] length: [jsonString length]];
NSURL *url = [NSURL URLWithString:requestString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
[request setHTTPBody: jsonData];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:[NSString stringWithFormat:#"%d", [jsonData length]] forHTTPHeaderField:#"Content-Length"];
NSError *errorReturned = nil;
NSURLResponse *theResponse =[[NSURLResponse alloc]init];
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&theResponse error:&errorReturned];
if (errorReturned) {
NSLog(#"Error %#",errorReturned.description);
}
else
{
NSError *jsonParsingError = nil;
NSMutableArray *arrDoctorInfo = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:&jsonParsingError];
NSString* newStr = [NSString stringWithUTF8String:[data bytes]];
NSLog(#"Dict %#",newStr);
}
And I am getting following Response
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
<title>Calculator</title>
<style>
body { margin: 0px; padding: 0px; font-family: verdana; font-size: 12pt; background-color: #FCFCFC; }
div.service-header {
height: 34px;
font-weight: bold; padding: 10px; font-size: 30px; color: white; border-bottom: 1px solid black; background: #70803C;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#A0B06C', endColorstr='#70803C'); background: -webkit-gradient(linear, left top, left bottom, from(#A0B06C), to(#70803C)); background: -moz-linear-gradient(top, #A0B06C, #70803C);
text-shadow: #555555 2px 3px 3px;
}
div.service-header div.service-title {position: relative; float:left}
div.service-header .skin-selector {padding-top: 8px; margin-bottom: 0; position:relative; float: right; font-size: 12pt;}
div.service-overview {
float: right; margin: 20px; width: 200px;
-moz-border-radius: 7px 7px 7px 7px; -webkit-border-radius: 7px 7px 7px 7px; border-radius: 7px 7px 7px 7px; background-color: #F6F6F6; border: 1px solid #E6E6E6; border-collapse: separate; font-size: 11px; padding: 10px; margin-right: 20px;
-moz-box-shadow: 2px 2px 4px #555; -webkit-box-shadow: 2px 2px 4px #555; box-shadow: 2px 2px 4px #555;
}
div.service-overview div.headline { font-weight: bold; font-size: 18px; }
div.service-overview div.title { font-weight: bold; margin: 4px; font-size: 1.2em; }
div.service-overview ul.list { padding: 0px; margin: 0px; margin-left: 15px; list-style-type: none; }
div.service-overview ul.list li { font-size: 1.1em; }
div.service-description { padding: 15px; padding-bottom: 0px; }
div.service-description div.title { font-weight: bold; font-size: 1.2em; }
div.service-description p.doc-lines { font-size: 0.8em; }
div.service-description p.url { font-size: 0.8em; font-style: italic; }
div.service-description p.url span.url-title { font-weight: bold; }
div.service-interfaces { padding: 15px; padding-bottom: 0px; }
div.service-interfaces div.title { font-weight: bold; font-size: 1.2em; }
div.service-interfaces ul.list { font-size: 0.8em; }
div.service-interfaces ul.list li { padding: 4px; }
div.service-api { padding: 15px; padding-bottom: 0px; }
div.service-api div.methods div.title { font-weight: bold; font-size: 1.2em; }
div.service-api div.methods ul.list { font-size: 0.9em; list-style-type: none; }
div.service-api div.methods ul.list li.entry {
-moz-border-radius: 7px 7px 7px 7px; -webkit-border-radius: 7px 7px 7px 7px; border-radius: 7px 7px 7px 7px; background-color: #F6F6F6; border: 1px solid #E6E6E6;
border-collapse: separate; font-size: 0.8em; padding: 10px; margin-right: 20px;
-moz-box-shadow: 2px 2px 5px #555; -webkit-box-shadow: 2px 2px 5px #555; box-shadow: 2px 2px 5px #555;
margin-bottom: 16px;
}
div.service-api div.methods ul.list li.entry div.declaration {
font-size: 1.5em;
}
div.service-api div.methods ul.list li.entry div.declaration span.name { color: #881a1a; }
div.service-api div.methods ul.list li.entry span.param-type { color: #68387f; }
div.service-api div.methods ul.list li.entry span.param-name {}
div.service-api div.methods ul.list li.entry p.doc-lines { font-size: 1.2em; color: #276d11; }
div.service-api div.methods ul.list li.entry ul.params p.doc-lines { margin-top:0;margin-bottom:6px; font-size: 1.0em; color: #276d11; }
div.service-api div.types div.title { font-weight: bold; font-size: 1.2em; }
div.service-api div.types ul.list { font-size: 0.9em; list-style-type: none; }
div.service-api div.types ul.list li.entry {
-moz-border-radius: 7px 7px 7px 7px; -webkit-border-radius: 7px 7px 7px 7px; border-radius: 7px 7px 7px 7px; background-color: #F6F6F6; border: 1px solid #E6E6E6;
border-collapse: separate; font-size: 0.8em; padding: 10px; margin-right: 20px;
-moz-box-shadow: 2px 2px 5px #555; -webkit-box-shadow: 2px 2px 5px #555; box-shadow: 2px 2px 5px #555;
margin-bottom: 16px;
}
div.service-api div.types ul.list li.entry div.definition {
font-size: 1.5em;
}
div.service-api div.types ul.list li.entry div.definition span.name { color: #881a1a; }
div.service-api div.types ul.list li.entry span.param-type { color: #68387f; }
div.service-api div.types ul.list li.entry span.param-name {}
div.service-api div.types ul.list li.entry p.doc-lines { margin-top:0;margin-bottom:6px; font-size: 1.0em; color: #276d11; }
div.service-footer { font-size: 0.8em; text-align: center; font-style: italic; padding-top: 10px; padding-bottom: 10px; }
a:link { color: #00732F; text-decoration: none }
a:visited { color: #00732F; text-decoration: none }
a:hover { color: #00732F; text-decoration: underline }
</style>
</head>
<body>
<div class="service-header">
<div class="service-title">Calculator</div>
<form method="get" class="skin-selector">
<label for="skin-select">skins:</label>
<select id="skin-select" name="skin" onchange="document.forms[0].submit()">
<option value="">Default</option>
<option value="simple">Simple</option>
<option value="bluebox">Bluebox</option>
</select>
</form>
</div>
<div class="service-overview">
<div class="headline">Overview</div>
<div class="title">Methods</div>
<ul class="list">
<li>
<span class="entry">add</span>
( )
</li>
</ul>
<div class="title">Types</div>
<ul class="list">
</ul>
</div>
<div class="service-description">
<div class="title">Description</div>
<p class="doc-lines">
This service does the math, and serves as example for new potential Ladon users.
</p>
</div>
<div class="service-interfaces">
<div class="title">Interfaces</div>
<ul class="list">
<li>soap11 [ url description ]</li>
<li>jsonwsp [ url description ]</li>
<li>soap [ url description ]</li>
</ul>
</div>
<div class="service-api">
<div class="methods">
<div class="title">Methods</div>
<ul class="list">
<li class="entry">
<div class="declaration">
<a name="add"></a><span class="name">add</span>
(
<span class="param-type">
number
</span>
<span class="param-name">a</span>
,
<span class="param-type">
number
</span>
<span class="param-name">b</span>
)
</div>
<p class="doc-lines">
Add two integers together and return the result
</p>
<div class="params-title">Parameters</div>
<ul class="params">
<li>
<span class="param-name">a</span>: <span class="param-type">
number
</span>
<br/>
<p class="doc-lines">
1st integer
</p>
</li>
<li>
<span class="param-name">b</span>: <span class="param-type">
number
</span>
<br/>
<p class="doc-lines">
2nd integer
</p>
</li>
</ul>
<div class="return-type-title">Return value</div>
<div class="return-type">
<span class="param-type">
number
</span>
<p class="doc-lines">
The result of the addition
</p>
</div>
</li>
</ul>
</div>
<div class="types">
<div class="title">Types</div>
<ul class="list">
</ul>
</div>
</div>
<div class="service-footer">Powered by Ladon for Python</div>
</body>
</html>

It looks like the URL path you are using is wrong and should be changed to http://ladonize.org/python-demos/Calculator/jsonwsp.
A better way to create jsonData would be using dataUsingEncoding:.
You shouldn't be creating a response:
NSURLResponse *theResponse =[[NSURLResponse alloc]init];
Because it will be created and returned to you as part of the sendSynchronousRequest. What you should be doing is checking the contents of theResponse to verify the HTTP status code.

This is working solution...
NSString *requestString = [NSString stringWithFormat:
#"http://ladonize.org/python-demos/Calculator/jsonwsp"];
NSString *jsonString = [NSString stringWithFormat:#"{\"methodname\":\"add\",\"args\": {\"a\":123,\"b\":123}}"];
//: {"methodname": "add", "args": {"a":"123","b":"123"}}
NSLog(#"the request string is %#", requestString);
NSData *jsonData = [NSData dataWithBytes: [jsonString UTF8String] length: [jsonString length]];
NSURL *url = [NSURL URLWithString:requestString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
[request setHTTPBody: jsonData];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:[NSString stringWithFormat:#"%d", [jsonData length]] forHTTPHeaderField:#"Content-Length"];
NSError *errorReturned = nil;
NSURLResponse *theResponse =[[NSURLResponse alloc]init];
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&theResponse error:&errorReturned];
if (errorReturned) {
NSLog(#"Error %#",errorReturned.description);
}
else
{
NSError *jsonParsingError = nil;
NSMutableArray *arrDoctorInfo = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:&jsonParsingError];
NSString* newStr = [NSString stringWithUTF8String:[data bytes]];
NSLog(#"Dict %#",newStr);
}