Build your own mobile friendly website with Flask.

Requirements

  • Python 3.8+ or Anaconda
  • Integrated Development Environment (IDE)

Development Framework

Screenshoot from Pycharm

Initialize your first project

Write your first python file

pip install flask == 1.1.2
from flask import Flask, render_template

app = Flask(__name__)

@app.route("/")
def index():
return "Hello World!"


if __name__ == "__main__":
app.directory='./'
app.run(host='127.0.0.1', port=5000)

Prepare your folder structure

Webpage_Tutorial/

├── static
│ └──css
├── templates
│ └──layouts
└── run.py

Insert your CSS

Create your first HTML file

<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>This is a tutorial</title>
<meta name="description" content="I present to you a free tutorial for developing a mobile friendly app"/>
<meta name="keywords" content="Tutorial, Mobile, Free"/>
<meta name="author" content="<author>" />
<meta name="copyright" content="<author>" />
<meta name="robots" content="index"/>
<meta name="robots" content="follow"/>
<meta name="msapplication-TileColor" content="#da532c">
<meta name="theme-color" content="#ffffff">


<link rel="stylesheet" href="./static/css/normalize.css"/>
<link rel="stylesheet" href="./static/css/skeleton.css"/>

</head>
<body>
<div class="container">

<div style="clear: both">
&nbsp;

{% block content%}{% endblock %}

</div>

</div>
</body>
</html>
{% extends "layouts/main.html" %}

{% block content%}

</body>

<h5>{{greetings}}</h5>

</body>

{% endblock %}
@app.route("/")
def index():
greetings = "Hello World"
return render_template("home.html", greetings=greetings)

Create a responsive navigation bar

/* Dropdown content (hidden by default) */
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content a {
float: none;
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}

/* Add a grey background color to dropdown links on hover */
.dropdown-content a:hover {
background-color: #ddd;
}

/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
display: block;
}

/* Add a black background color to the top navigation */
.topnav {
background-color: #333;
overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}

/* Add an active class to highlight the current page */
.active {
background-color: grey;
color: white;
}

/* Hide the link that should open and close the topnav on small screens */
.topnav .icon {
display: none;
}

/* Dropdown container - needed to position the dropdown content */
.dropdown {
float: left;
overflow: hidden;
}

/* Style the dropdown button to fit inside the topnav */
.dropdown .dropbtn {
font-size: 17px;
border: none;
outline: none;
color: white;
padding: 14px 16px;
background-color: inherit;
font-family: inherit;
line-height: 30px;
}

/* Style the dropdown content (hidden by default) */
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}

/* Style the links inside the dropdown */
.dropdown-content a {
float: none;
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}

/* Add a dark background on topnav links and the dropdown button on hover */
.topnav a:hover, .dropdown:hover .dropbtn {
background-color: #555;
color: white;
}

/* Add a grey background to dropdown links on hover */
.dropdown-content a:hover {
background-color: #ddd;
color: black;
}

/* Show the dropdown menu when the user moves the mouse over the dropdown button */
.dropdown:hover .dropdown-content {
display: block;
}

/* When the screen is less than 600 pixels wide, hide all links, except for the first one ("Home"). Show the link that contains should open and close the topnav (.icon) */
@media screen and (max-width: 600px) {
.topnav a:not(:first-child), .dropdown .dropbtn {
display: none;
}
.topnav a.icon {
float: right;
display: block;
}
}

@media screen and (max-width: 600px) {
.topnav.responsive {position: relative;}
.topnav.responsive a.icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
}
.topnav.responsive .dropdown {float: none;}
.topnav.responsive .dropdown-content {position: relative;}
.topnav.responsive .dropdown .dropbtn {
display: block;
width: 100%;
text-align: left;
}
}

</style>
<link rel=”stylesheet” href=”https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"> 
<div class="dropdown">
<button class="dropbtn">Examples
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<a href="/Example1">Example 1</a>
</div>
</div>
<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>
<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>This is a tutorial </title>
<meta name="description" content="I present to you a free tutorial for developing a mobile friendly app"/>
<meta name="keywords" content="Tutorial, Mobile, Free"/>
<meta name="author" content="<author>" />
<meta name="copyright" content="<author>" />
<meta name="robots" content="index"/>
<meta name="robots" content="follow"/>
<meta name="msapplication-TileColor" content="#da532c">
<meta name="theme-color" content="#ffffff">


<link rel="stylesheet" href="./static/css/normalize.css"/>
<link rel="stylesheet" href="./static/css/skeleton.css"/>
<link rel="stylesheet" href="./static/css/style.css"/>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">


</head>
<body>
<div class="container">
<div class="topnav" id="myTopnav">
<a href="/" class="active">Home</a>
<div class="dropdown">
<button class="dropbtn">Examples
<i class="fa fa-caret-down"></i>
</button>
<div class="dropdown-content">
<a href="/Example1">Example 1 </a>
</div>
</div>
<a href="javascript:void(0);" class="icon" onclick="myFunction()">
<i class="fa fa-bars"></i>
</a>
</div>

<div style="clear: both">
&nbsp;

{% block content%}{% endblock %}

</div>

<script>
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}
</script>

</div>
</body>
</html>

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I am a data analyst discovering the unlimited world of coding and data.

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Antonio Blago

Antonio Blago

I am a data analyst discovering the unlimited world of coding and data.

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