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Sunday, July 26, 2020


1 - About Flask Framework

Flask is an open-source Python web development framework. Its main goal is to be light, in order to keep the flexibility of Python programming, associated with a system of templates. It is distributed under the BSD license.
Flask was originally created by Armin Ronacher as an April Fool's . Ronacher's wish was to create a web framework contained in a single Python file but able to maintain high demand applications.

In 2018, Flask was voted "Most Popular Web Framework" by the Python Developers Survey. As of January 2020, it had over 49,000 stars on Github, more than any other Python web development framework.

2 - Features

Flask is based on two modules werkzeug and jinja to offer several of the following features:
  1.     Development server and debugger
  2. Simplifies writing unit tests
  3. Template engine for HTML  rendering
  4. Supports secure cookies (session) 
  5. Fully compatible with WSGI
  6. Based on Unicode
  7. Complete documentation
  8. Easy deployment on multiple hosts
  9. Adding functionalities via extensions

3 - Install Flask Framework

Install Flask Flask Framework can be installed easily and quickly by using the pip command: Flask:
pip install Flask

4 - First program Hello World with Flask

The basic program for using Flask is:
from flask import Flask

app = Flask(__name__)

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

if __name__ == "__main__":
    app.run()
After execution you will see this message:
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
Then by typing the the url : http://127.0.0.1:5000/  in your browser you will see the "Hello World !" message:




Younes Derfoufi
my-courses.net

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Saturday, July 25, 2020

 
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Friday, July 24, 2020


Exercise 80

Write an algorithm in Python as a function which takes two numbers m and n as parameters (m < n) and which returns a list formed of all the prime numbers between m and n. Example for m = 10 and n=20  the function must return:
[11, 13, 17, 19]

Solution



def primNumber(n):
    # take initial value of number of divisors
    numberOfDivisors = 0
    for i in range(1,n+1):
        
        # while i is a divisor of n we increment we increment numberOfDivisors
        if n%i == 0:
            numberOfDivisors = numberOfDivisors + 1
    # the number n is prim number only if numberOfDivisors == 2
    if numberOfDivisors == 2:
        return True
    else:
        return False

# Now we can find the set of the prims numbers in given intervall [m,n]
def listPrimNumbers(m,n):
    listPrim = []
    for i in range(m , n+1):
        
        # we test if i is prim or not
        if (primNumber(i)):
            # we add i to the list if it is a prim number
            listPrim.append(i)
    return listPrim

# Testing the function
print(listPrimNumbers(10,20))
# The output is [11, 13, 17, 19]


Younes Derfoufi
my-courses.net

Monday, July 20, 2020

Exercise 68

Write a Python function that takes as argument an integer n and that return the list of all divisors of n.

Solution

def allDivisors(n):
    listDiv =[]
    for i in range(1,n+1):
        if n%i == 0:
            listDiv.append(i)
    return listDiv

# testing a function
print("List of all divisor of 20 is : ", allDivisors(20))
#The output is : List of all divisor of 20 is :  [1, 2, 4, 5, 10, 20]


Younes Derfoufi
my-courses.net
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Sunday, July 19, 2020


Exercise 67 

Write a function in Python which takes as argument an integer n and which returns True if the number n is prime and False if n is not prime without using any predefined function.

Solution

def primNumber(n):
    # take initial value of number of divisors
    numberOfDivisors = 0
    for i in range(1,n+1):
        
        # while i is a divisor of n we increment we increment numberOfDivisors
        if n%i == 0:
            numberOfDivisors = numberOfDivisors + 1
    # the integer n is a prim number only if numberOfDivisors == 2
    if numberOfDivisors == 2:
        return True
    else:
        return False
    
# Testing the function
print(primNumber(7)) # The output is True because 7 is a prim number
print(primNumber(6)) # The output is False because 6 is not a prim number


Younes Derfoufi
my-courses.net

Saturday, July 18, 2020


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Friday, July 17, 2020


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Thursday, July 16, 2020


Exercise 66

Write a function in Python which takes as argument a tuple (a, b) composed of two integers and returns it the least common multiple LCM of a and b without using any predefined function in python.

Solution



def leastCommonMult(a,b):
    # take m = a as initial value
    m = a
    
    # while m is not common multiple
    while (m%a != 0 or m%b !=0):
        # we incremente m
        m = m + 1
    return m

# testing function
print("The least common multiple of 6 and 9  is m = ",leastCommonMult(6 , 9))
#The out put is: The least common multiple of 6 and 9  is m =  18        


Younes Derfoufi
my-courses.net

 Exercise 65

Write a function in Python which takes as argument a tuple (a, b) composed of two integers and returns it the greatest common divisor GCD of a and b without using any predefined function in python.

Solution



def greatestCommonDiv(a,b):
    # take d = a as initial value
    d = a
    
    # while d is not common divisor
    while (a%d != 0 or b%d !=0):
        # we decremente d
        d = d - 1
    return d

# testing function
print("The geatest common divisor of 8 and 12 is d = ",greatestCommonDiv(8,12))
# The output is : The geatest common divisor of 8 and 12 is d =  4


Younes Derfoufi
my-courses.net

1 - About the pip utility 

pip Python is a standard package management system used to install and manage software packages: Python modules and libraries easilyvia the cmd command.
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Tuesday, July 14, 2020



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Younes Derfoufi
my-courses.net


 
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Saturday, July 11, 2020



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Thursday, July 9, 2020

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Wednesday, July 8, 2020

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Tuesday, July 7, 2020

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Monday, July 6, 2020


The WordPress CMS uses MySQL which is a free, free and widely used relational database management system. WordPress can thus store and retrieve the information present on the website through several tables present as soon as the content management system is installed.

1 - About this tutorial

In this tutorial we will see how to:
  1. Install Local Web Server Uwamp
  2. Create database in phpMyAdmin of local web server  Uwamp
  3. Download and install the CMS Wordpress on local Web server Uwamp

The background property as its name suggests, allows us to modify the background of our web page: we can put a color of our choice, we can also put a nice image as a background ...

1 - background-color 

This property is used to change the background color of an element. Example: coloring of the background in red:
body {background-color: blue; }
 If you want test this code example, insert it between head and head:
<!DOCTYPE html>
<html lang="en">
<head>
    <title> Background </title>
    <style>
        body {
            background-color: blue;
        }
    </style>
</head>
<body>

</body>
</html>
and then launch it in your browser:

2 - background-image 

 This property is used to put an image in the background of an element. The image is automatically repeated to cover the entire element in question.

Example

body {backgroun-image: url (address); } // address = url address of the image

3 - background-repeat

This property defines how the image should repeat itself.

Example: background without repeating the image

body {backgroun-image: url (address); background-repeat: no-repeat; } // no image repetition

Example: background with horizontal repetition of the image (repeat-x)

body {backgroun-image: url (address); background-repeat: repeat-x; } // repeat horizontally

Example: background with vertical repetition of the image (repeat-y)

body {backgroun-image: url (address); background-repeat: repeat-y; } // repeat vertically

4 - background-position 

This property is used to determine the position of the image on the background using the following keywords:
  1. top : image centered in the top of the page or block. 
  2. center : image in the center of the page or block.
  3. bottom : image at the bottom center of the page or block. 
  4. right : image in the right of the page or block. 
  5. left  :  image in the left of the page or block. 

Example: background with an image palcée at the top left

body {backgroun-image: url (address);
background-repeat: no-repeat;
background-position: left top; }
the image in this example is positioned at the top left
We can also use the coordinate of object:
body {backgroun-image: url (address);
background-repeat: no-repeat;
background-position: x , y; }

Exemple

<!DOCTYPE html>
<html lang="en">
<head>
    <title> Background </title>
    <style>
    body {
           background-image: url('https://download.seaicons.com/icons/iconshow/transport/128/Sportscar-car-icon.png');
           background-repeat: no-repeat;
    background-position: 100px 20px;
        }
    </style>
</head>
<body>

</body>
</html>

Note: We can also use the% for positioning the image 

Example: To position the image at the top right we use the code:

body {backgroun-image: url (address);
background-repeat: no-repeat;
background-position: 100% 0%; }

Example: To position the image in the middle of the page, we use the code:

body {backgroun-image: url (address);
background-repeat: no-repeat;
background-position: 50% 50%; }

Example of background with no-repeat

<!DOCTYPE html>
<html lang="en">
<head>
    <title> Background </title>
    <style>
        body {
            background-image: url('https://download.seaicons.com/icons/iconshow/transport/128/Sportscar-car-icon.png');
            background-repeat: no-repeat;
        }
    </style>
</head>
<body>

</body>
</html>
After Execution we will see:

Example of background with repeat-x

<!DOCTYPE html>
<html lang="en">
<head>
    <title> Background </title>
    <style>
        body {
            background-image: url('https://download.seaicons.com/icons/iconshow/transport/128/Sportscar-car-icon.png');
            background-repeat: repeat-x;
        }
    </style>
</head>
<body>

</body>
</html>
After Execution we will see:

Example of background with repeat-y

<!DOCTYPE html>
<html lang="en">
<head>
    <title> Background </title>
    <style>
        body {
            background-image: url('https://download.seaicons.com/icons/iconshow/transport/128/Sportscar-car-icon.png');
            background-repeat: repeat-y;
        }
    </style>
</head>
<body>

</body>
</html>
After Execution we will see:

Younes Derfoufi
my-courses.net

Sunday, July 5, 2020


1 - Text-align

This property allows you to define the alignment of a text.

Example:

// This code is used to align all the paragraphs to the right.
p {text-align: right; }

1 - Tag selector & general syntax of a CSS code 

 Before we talk about the properties of a selector, let's take a simple example:

Example

to put the title tag h1 in red we use the code:
h1 {color: # FF0000; }
In this example:
  1. h1 : represent the selected tag by the tag selector, 
  2. color : indicates here the property of the selector which it's value in this case is red. 
From this example, we can deduce the general syntax of a CSS code:
Tag selector {property: values;}


 1 - Introduction

Introduced in the mid-1990, CSS became widely used in web design and well supported by web browsers. CSS (Cascading Style Sheets) is a language that consists of grouping in one document formatting characteristics associated with groups of elements. Just define a set of definitions and formatting characteristics by name, and call it to apply it to text. A css code is inserted between the and tags or in a separate style.css sheet, while its effect is applied to the entire web page in question.

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