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Saturday, October 31, 2020

python-courses-python-exercises-python-tutorials-python-formation

What is Python?
study Python, the popular and pervasive programming language constructed for almost each purpose.

Python is a famous fashionable-cause programming language that may be used for a wide form of applications. It consists of excessive-level statistics systems, dynamic typing, dynamic binding, and plenty of more features that make it as useful for complicated software improvement as it's far for scripting or "glue code" that connects components collectively. it can additionally be extended to make system calls to nearly all running structures and to run code written in C or C++. due to its ubiquity and potential to run on nearly every machine architecture, Python is a ordinary language discovered in a spread of different packages.
Python is an interpreted, interactive, item-oriented programming language. It carries modules, exceptions, dynamic typing, very high degree dynamic facts kinds, and training. —Python software program foundation FAQ
The programming language consists of thousands of 0.33-birthday celebration modules to be had in the Python package deal Index (PyPI). PyPI gives popular requirements for extraordinary know-how, like Django for internet improvement and NumPy, Pandas, and Mathplotlib for data technology. about Python
First evolved inside the overdue Nineteen Eighties by way of Guido van Rossum, Python has advanced as an open supply programming language by way of handling public dialogue thru Python Enhancement Proposals (PEPs). In 2018, van Rossum stepped down because the language's Benevolent Dictator For lifestyles (BDFL), and, as officially outlined in PEP 13, a guidance council was installed area to function the leadership of the language.
The Python software program foundation (PSF) is a 501non-income organisation that holds the highbrow assets rights in the back of the Python programming language. This includes Python model 2.1 and later, PyPI, the CPython reference implementation, and infrastructure to maintain the language. The PSF also offers presents for software craftship and runs multiple PyCon conferences a 12 months.
Python is currently on its 0.33 principal model and is regularly up to date.
Is Python open supply?
sure, all present day variations of Python are copyrighted under a GPL-like minded license licensed by means of the Open source Initiative. The Python emblem is trademarked but lets in for personalisation (see the entire license for info).
you can down load the Python source code here.

Why use Python?
There are several reasons why Python is a good desire as a programming language, relying on your attitude and heritage.
Python for programmers
the ones new to programming can gain from Python's excessive level of abstraction. it is especially interactive and regarded for its "strong opinions" round precise syntax (together with whitespace). Python, like different high-degree languages, has a rubbish series technique to manage reminiscence or delete unused resources. A user can acquire instant feedback from the interpreter by using typing python at the command line or through the usage of projects like JupyterLab if they need a browser-based totally improvement experience. Many customers also respect that Python has a strict syntax enforced through the compiler, making it clean to have a unmarried "proper manner" to write a program.
Unix -Python-courses-Solaris, Linux, FreeBSDPython-courses-python-exercises-python

Exercise 77

Write a Python algorithm which determines the first index of an existing occurrence within a given string s without using any predefined method as find() or rfind()... The algorithm must return -1 if the occorrence does not exist within the string s. Example if s = "Python programming language", and occ = "prog" the algorithm return 7

Solution

def findFirstOccurrence(s , occ):
    # getting the length of the occurrence occ and the len of the string s 
    m = len(occ)
    n = len(s)

    # initialize index 
    index = -1
    # searching the occurrence occ within the string s
    for i in range(0 , n-m):
        if s[i : m + i] == occ:
            index = i
            break
    return index

# Example:
s = "Python programming language"
occ1 = "prog"
occ2 = "algorithm"
print(findFirstOccurrence(s, occ1)) # display: 7
print(findFirstOccurrence(s, occ2)) # display: -1


Younes Derfoufi
my-courses.net

Friday, October 30, 2020

features-Python-courses-python-exercises-python-oop

Exercise 76

Write a python algorithm that transform a given string s by swapping the second character (s[1]) with the befor last character. We assume that len(s) is greater or equal than 4. Example if s = "Python" , the algorithm returns the string: "Pothyn".

Solution

def swapping(s):
    
    n = len(s)
    
    s_swap = s[0] + s[n-2] + s[2:n-2] + s[1] + s[n-1]
    
    return s_swap

# Example
s = "Python"
print(swapping(s)) # the output is : Pothyn


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

Python is an interpreted, item-orientated, excessive-level programming language with dynamic semantics. The Python Developer's handbook offers novices with a simple introduction to the basics, and experts will find advanced details they want.
Python is an smooth to study, powerful programming language. It has green high-level facts systems and a simple but powerful technique to item-oriented programming. Python’s fashionable syntax and dynamic typing, together with its interpreted nature, make it an excellent language for scripting and fast application development in many regions on most structures. This app assets the official Python 3.7.2 documentation educational phase and presents and easy to read, loose, offline way to examine the equal.
Python is a popular-purpose programming language that is turning into ever extra popular for the information technology.This course specializes in python mainly for fundamental to strengthen.
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* Python three.6
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Thursday, October 29, 2020

Python-courses-python-exercises-python-students-online-courses

Exercise 75

Write a python algorithm which determines the list of all common characters to two strings s1 and s2 without repetition. Example if s1 = "Python language" and s2 = "Programming", the algorithm returns the liste ['P', 'o', 'n', 'a', 'g'] ( the charcter 'g' must be added only once even if shared twice)

Solution

def commonCharacters(s1 , s2):
    # initializing the list of common characters
    listCommon = []
    for x in s1:
        if x in s2 and x not in listCommon:
            listCommon.append(x)
    return listCommon

# Example
s1 = "Python language"
s2 = "Programming"
print("List of common characters : ", commonCharacters(s1 , s2))
# The output is : List of common characters :  ['P', 'o', 'n', 'a', 'g']


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-python-list

Exercise 74

Write a Python program that replace the characters with odd index of a given string by '#'. Exemple if s = "Python" , the algorithm returns the string: "P#t#o#"

Solution

def replace(s):
    n = len(s)
    # initializing desired string
    new_string = ""
    
    # iterate over all characters of string s
    for i in range(0 , n):
        # adding the character of even index to the new string
        if( i%2 == 0 ):
            new_string = new_string + s[i]
        else:
            new_string = new_string + '#'
    return new_string

# Example
s = "Python"
print(replace(s)) # display : P#t#o#


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

research Python with this app without commercials.
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In every lesson, there are factors, examples with the try It your self functionality that help you successfully discover ways to code Python. - what's Python?
it's miles a programmbuilt-ing language developed built-ingintegrated Guido van Rossum, that's integratedterpreted, offers high-degree capabilities and additionally built-incorporatesintegrated characteristics of a preferred-reason programmintegratedg language. Its shape is primarily based on garbage-collection and dynamic typintegratedg, built-ing multiple programmbuilt-ing-paradigms built-include object-oriented, practical, and procedural programmbuilt-ing, with a majority of these technical aspects renderbuilt-ing it a dynamic built-individual and built-ingintegrated programmers to leverage it for small built-in addition to big-scale actual projects.
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As built-in the above solution, we are able to see that we have used two key phrases whilst defbuilt-inintegratedg it. So, let’s first recognize the built-ing of those first key phrases.

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this is called a excessive –level language because it is very farther away from built-ineintegrated stage language (which built-includes zero’s and 1) and it’s hard to code. So, it built-in difficult to code whereas that is effortlessly readable so it's far very farther far from machbuiltintegrated stage language. So it turns builtintegrated a high-stage language. excessive-degree language syntax is greater readable built-in comparison to low-level language. One greater component that I would like is whilst we write this it isn't always a compiled language but an integratedterpreted one which means that it must be run with the aid of any other application, integrated this case, an integratedterpreter not by the processor, built-in contrast to c program languageperiod that is run directly by the processor.

- item-orientated Programmintegratedg Language
it's far an object-oriented programmintegratedg language which means it works on items. So what's an object? as an exampleintegrated, Tiger is an object whose shade and age are its attributes and looking and reproducintegratedg its behavior. So, as shown built-inintegrated above built-in an object has two characteristics: attributes and conduct. So, there are a few basic built-inciples of OOPs as built-in beneath:
Inheritance: In this situation, a toddlerintegrated elegance can use the conduct and attributes of the figure magnificence. Encapsulation: Hidintegratedg the non-public built-information of a category from other items.
Polymorphism: built-in a commonplace conduct/operation integrated built-indintegrated forms for extraordbuiltintegrated integratedputs.
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Wednesday, October 28, 2020

features-Python-courses-python-exercises-python-oop

Exercie 73

Write a python algorithm which delete all vowels from a given string s. Example if s = "Python is hight level programming language", the algorithm returns the string: "Pthn s hght lvl prgrmmng lngg"

Solution

def deleteVowels(s):
    # define the liste of vowels
    vowels = ['a','e','y','u','i','o']
    
    # initializing the string without vowels
    s1 = ""
    
    # iterate over all characters in the string s
    for x in s:
        if x not in vowels:
            s1 = s1 + x
    return s1

# Example
s = "Python is hight level programming language"
print(deleteVowels(s)) 
# display: Pthn s hght lvl prgrmmng lngg


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-python-dictionary

Exercise 72 **

Write a python algorithm to examine if an occurrence is present within a given string.

Solution

def examineOccurrence(s , occ):
    # getting the length of the occurrence occ and the len of the string s 
    m = len(occ)
    n = len(s)
    
    # initialize counter 
    counter = 0
    # searching the occurrence occ within the string s
    for i in range(0 , n-m):
        if s[i : m + i] == occ:
            counter = counter + 1
    if counter > 0:
        return True
    else:
        return False
    
# Example:
s = "Python is the most popular programming language"
occ1 = "most"
occ2 = "algorithm"
print(examineOccurrence(s, occ1)) # display: True
print(examineOccurrence(s, occ2)) # display: False


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-python-certification

Exercise 71 **

Write a Python program which determines the minimum digit within a given string s. Example if s = "Python3.7 is more power than Python2.7" , the algorithm must returns 2. We assume that the string s does not contain any negative number.

Solution

def minimumDigit(s):
    # creating and initializing the list of digits 
    listDigits = []
    for x in s:
        if x.isdigit():
            x = int(x)
            listDigits.append(x)
    
    # initializing the minimum of digits
    minDigit = listDigits[0]
    
    # iterate over all list elements
    for n in listDigits:
        if minDigit > n:
            minDigit = n
    return minDigit
# Example:
s = "Python3.7 is more power than Python2.7"
print("The minimum  digit within s is : ", minimumDigit(s))
# The output is : The minimum  digit within s is :  2


Younes Derfoufi
my-courses.net

Tuesday, October 27, 2020

python-courses-python-exercises-python-tutorials-python-formation

Python has been an object-oriented language since it existed. on this academic we are able to try to get in-depth capabilities of OOPS in Python programming.
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python-courses-python-exercises-python-tutorials-python-formation

Snap shots outline the world, every photograph has its own tale, it contains a whole lot of crucial facts that may be beneficial in many methods. This data can be obtained with the assist of the method referred to as picture Processing.
it's far the core a part of computer vision which plays a important position in many real-global examples like robotics, self-using vehicles, and item detection. image processing permits us to transform and control thousands of pictures at a time and extract useful insights from them. It has a wide variety of applications in almost every discipline.
Python is one of the extensively used programming languages for this reason. Its first-rate libraries and gear help in achieving the venture of picture processing very successfully.
thru this article, you may find out about classical algorithms, strategies, and tools to method the photograph and get the favored output. permit’s get into it!
what's picture processing?
as the call says, image processing method processing the image and this will encompass many exclusive strategies till we reach our intention.
The very last output can be both inside the form of an photograph or a corresponding characteristic of that image. this will be used for in addition analysis and selection making.

however what's an picture?
An photo may be represented as a 2nd function F(x,y) wherein x and y are spatial coordinates. The amplitude of F at a selected cost of x,y is referred to as the intensity of an photograph at that point. If x,y, and the amplitude fee is finite then we name it a digital photo. it's far an array of pixels arranged in columns and rows. Pixels are the factors of an image that comprise statistics approximately depth and colour. An image also can be represented in 3-d in which x,y, and z come to be spatial coordinates. Pixels are arranged within the form of a matrix. this is referred to as an RGB picture.
picture in second space

Python is an interpreted, excessive-level, trendy-motive programming language. Created through Guido van Rossum and first launched in 1991, Python's layout philosophy emphasizes code readability with its superb use of tremendous whitespace. Its language constructs and item-orientated method purpose to help programmers write clean, logical code for small and huge-scale projects.

Python is an smooth to analyze, powerful programming language. It has efficient high-degree information structures and a easy but effective technique to object-oriented programming. Python’s elegant syntax and dynamic typing, together with its interpreted nature, make it a perfect language for scripting and speedy application improvement in lots of areas on most platforms.
picture Processing Algorithms in Python
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Monday, October 26, 2020

Python-courses-download-Python-courses-s-Python-courses

Exercise 70

Write a python program which extract from a given string s , the list of all words whose len is less than or equal to 4. Example if s = "The Python programming language is open source and very easy to learn" , the program must returns the list
L = ['The', 'is', 'open', 'and', 'very', 'easy', 'to']

Solution

def listWords(s):
   
   # initializing the list we want to get
   list_word = []
   # converting s into a list
   L = s.split()
   for word in L:
      if (len(word) <= 4):
         list_word.append(word)
   return list_word
   
# Example
s = "The Python programming language is open source and very easy to learn"
print(listWords(s)) # display: ['The', 'is', 'open', 'and', 'very', 'easy', 'to']


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-python-files

Exercise 69

Write a Python program as a function which takes a string s as parameter and which returns True if the string is duplicated and False if not. Example if s = "HelloHello", the function must returns True.

Solution

def duplicatedString(s):
    n = len(s)
    if n%2 ==0:
        m = int(n/2)
        if s[0:m] == s[m:]:
            return True
        else:
            return False
    else:
        return False
    
# Examples
s1 = "HelloHello"
s2 = "Python"
print(duplicatedString(s1)) # display True
print(duplicatedString(s2)) # display False


Younes Derfoufi
my-courses.net
Python-courses-neighborhood-Python-courses-bin-Python-courses-python-string

Exercise 67

Write a Python function which takes as parameter a tuple of string (s , s1) and returns True if s start with s1 and False if not, without using the Python startswith() method.

Solution

def isStartWith(s ,s1):
    n = len(s1)
    if s[:n] == s1:
        return True
    else:
        return False
# Example
s = "Python"
s1 = "Py"
print(isStartWith(s,s1)) # display:  True
print(isStartWith(s,"Pi")) # display:  False


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

This App is a combination of Python academic and Python Documentation. whether or not you need to begin getting to know Python, or a beginner, or an professional Python coder, this App will suite your wishes effectively. not best it publications you via a way to start coding in Python, it additionally serves as a reference every time you want one.
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Sunday, October 25, 2020

Python-courses-python-exercises-python-for-while

Exercise 64

Write a Python program to count the Uppercase characters within a given string. Example if s = "Python Programming", the program must returns 2.

Solution

def countUpper(s):
    
    # initializing the number of uppercase characters
    numberUpper = 0
    
    # iterate over all characters of s:
    for x in s:
        if x.isupper():
            numberUpper = numberUpper + 1 
           
    return  numberUpper

#Testing algorithm:
s = "Python Programmin"
print("The number of uppercase characters in  s is :" , countUpper(s))
# The output is : 
# The number of uppercase characters in  s is : 2


Younes Derfoufi
my-courses.net
Unix -Python-courses-Solaris, Linux, FreeBSDPython-courses-python-exercises-python

Exercise 63

Write a Python program that calculates the sum of digits numbers within a given string.

Solution

def digitSum(s):
    # initializing the sum of digits within the string s.
    sumDigit = 0
    
    # iterate over all characters of s:
    for x in s:
        if x.isdigit():
            
            # convert x into int type
            x = int(x)
            
            # adding x to sumDigit
            sumDigit = sumDigit + x
           
    return  sumDigit

#Testing algorithm:
s = "Python3.8 is more powerful than Python 2.7 "
print("The sum of digits within the string s is :" , digitSum(s))
# The output is : 
# The sum of digits within the string s is : 20


Younes Derfoufi
my-courses.net
Python-courses-neighborhood-Python-courses-bin-Python-courses-python-string

Exercise 62

Write a Python program that determines the list of digits within a given string. Example if s = "Python3.8 is more powerful than Python2.7 " the program must returns the list :
['3', '8', '2', '7']

Solution

def digit(s):
    # initializing the list of digits within the string s.
    digitList = []
    
    # iterate over all characters of s:
    for x in s:
        if x.isdigit():
            digitList.append(x)
           
    return  digitList

#Testing algorithm:
s = "Python3.8 is more powerful than Python2.7 "
print("List of digits within the string s :" , digit(s))
# The output is : 
# List of digits within the string s : ['3', '8', '2', '7']


Younes Derfoufi
my-courses.net
Python-courses-neighborhood-Python-courses-bin-Python-courses-python-string

Exercise 61

Write a Python program as function which takes as parameter a string s and return an other string obtained by removing the duplicate characters of s. Example if s = "Programming", the function must retun "Progamin"

Solution

def removeDuplicate(s):
    # initializing the string without duplicate characters
    string_no_duplicate = ""
    
    for x in s:
        if x not in string_no_duplicate:
            string_no_duplicate = string_no_duplicate + x
    return  string_no_duplicate

#Testing algorithm:
s = "Programming"
print("String without duplicate characters : '" , removeDuplicate(s) +"'")
# The output is : String without duplicate characters : ' Progamin'


Younes Derfoufi
my-courses.net

Friday, October 23, 2020

Unix -Python-courses-Solaris, Linux, FreeBSDPython-courses-python-exercises-python

Exercise 60

Write a python program as a function which takes as a parameter a string s and return an other string obtained from s by replacing the existing spaces within s by hyphen. Exemple if s = "Python is object oriented programming language" , the function must returns: "Python-is-object-oriented-programming-language" def lenStrin(s):

Solution

def deleteSpace(s):
    
    # initializing the string s that we want to get
    s1 = ""
    
    # browsing through all caracters in s
    for x in s:
        if x == " ":
            s = s + '-'
        else:
            s  = s + x
    return s
    
# testing algorithm
s = "Python is object oriented programming language"
print("The string without space : " , deleteSpace(s))
# The output is : The string without space :  Python is object oriented programming languagePython-is-object-oriented-programming-language


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

A simple Python Programming app with simple user interface. first-rate app to research Python Programming for free. download the app and start mastering python from scratch.
Python is presently one of the most famous and widely used programming languages. in case you want to discover what's Python used for, why the variety of organizations the use of it's far constantly developing, what are its most important commercial enterprise advantages, and why developers worldwide adore it, then I encourage you to study this article.
Do you marvel how Python should benefit your product concept? permit’s speak approximately this!
Python, the maximum famous programming language among builders earlier than moving into-depth into explaining what's Python used for and how does it paintings, let me give you a piece of history. Python turned into launched in 1991, so it has already pretty a long history. It’s an interpreted, item-orientated and general-reason programming language. Simplicity and clarity lie at its center, it’s intended to be easy to apply, however at the equal time able to build complex solutions.

currently, Python is evolved, controlled and promoted by way of Python software program foundation, a non-earnings organization that fosters the growth of the Python community, which, to be fair, is definitely thriving these days. you may find plenty of Python conferences, courses, tutorials, free resources of all kinds—this makes it extraordinarily accessible even for non-experienced builders. surely, Python’s mastering curve is considered to be one of the simplest of all programming languages, consequently it’s used in lots of introductory software program improvement guides. That’s why many beginners begin their programming adventures with Python.

current research confirms that Python is the maximum famous programming language (primarily based at the range of instructional searches in Google), and if it’s not sufficient, it’s additionally the most wanted amongst developers, consistent with an internet survey performed in 2019.

Python is especially used for backend improvement purposes: this part of a internet site or an application that isn't always visible to users, but guarantees that every one functionalities paintings as favored. but, some of Python frameworks including Django are perfectly appropriate for frontend net improvement as properly. That’s how bendy and multi-cause this language can be!

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it-Python-courses-python-string--Python-courses-python-exercises

Exercise 59

Write a python algorithm as a function which determines the length of a string without using the len () method or any other predefined method in python.

Solution

def lenStrin(s):
    
    # initializing the length of string s
    length = 0
    # iterate over all characters of s
    for x in s:
        length = length + 1
        
    return length

# Testing algorithm
s = "Python"

print("The length of s is : " , lenStrin(s))
# The output is : The length of s is :  6


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

So, you have by no means programmed before in Python. then this App is for you.
this is a fully app created to learn python at the cross without any statistics connectivity , this app is a completely offline app which consists of all the important concepts of python proper from the primary to superior. the tutorials in the app are divided in sections basic and advanced. primary tutorial consists of subject matter which includes
Python is a popular-purpose, versatile, and effective programming language. It’s a terrific first language as it’s concise and clean to study. anything you need to do, Python can do it. From web development to gadget gaining knowledge of to information technological know-how, Python is the language for you. Python is a dynamic, interpreted (bytecode-compiled) language. There are not any kind declarations of variables, parameters, capabilities, or methods in supply code. This makes the code brief and flexible, and you lose the bring together-time kind checking of the supply code. Python tracks the varieties of all values at runtime and flags code that doesn't make feel as it runs.

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Thursday, October 22, 2020

Python-courses-python-exercises-python-Array, String, user Inputs packages

Exercise 58

Write a Python program as a function which takes as parameter a string s and which returns another string obtained from s by replacing the possibly existing parentheses '(' and ')' in the string s with square brackets '[' and ']'. Example if s = "Python (created by Guido van Rossam) is oriented programming language (oop)." The function must returns: "Python [created by Guido van Rossam] is oriented programming language [oop]"

Solution

def transform(s):
    
    # initializing the transformed string
    transformed = ""
    
    for x in s:
        if x == '(':
            transformed = transformed + '['
        elif x == ')':
            transformed = transformed + ']'
        else:
            transformed = transformed + x
    return transformed

s = "Python (created by Guido van Rossam) is oriented programming language (oop)."

print(transform(s))
# The output is : Python [created by Guido van Rossam] is oriented programming language [oop].


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-games-Python-courses-

Exercise 57

Write a python program as a function which takes as parameter a tuple of string (s, s1) and which returns the number of the occurrences of s1 within the string s. Example if s = "Python is object oriented and dynamically typed " and s1 = "ed" , the function returns 2

Solution

def numberOccurrences(s , s1):
    n = len(s)
    m = len(s1)
    
    # initializing the number of occurrences of s1 wthin the string s.
    occurrences = 0

    for i in range(0 , n-m):
        if s[i:i+m] == s1:
            occurrences = occurrences + 1
    return occurrences

s = "Python is object oriented and dynamically typed " 
s1 = "ed"
print(numberOccurrences(s , s1)) # display 2


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

Python is a trendy-purpose interpreted, interactive, item-oriented, and excessive-level programming language. It was created by way of Guido van Rossum during 1985- 1990. Like Perl, Python source code is likewise available under the GNU trendy Public License (GPL). This educational offers enough knowledge on Python programming language.
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Wednesday, October 21, 2020

python-tutorial-Python-courses-python-exercises

Exercise 56

Write a python program as a function which takes as parameter a tuple of string (s, s1) and which returns the index of the first occurrence of s1 found within the string s. The function must returns -1 if s1 is not found within the string s. Example if s = "Python Programming" and s1 = "thon" , the function returns the index 2

Solution

def Find(s , s1):
    n = len(s)
    m = len(s1)
    k = -1
    for i in range(0 , n):
        if s[i:i+m] == s1:
            k = i
            break
    return k

s = "Python Programming" 
s1 = "thon"
print(Find(s , s1))      # display 2
print(Find(s , 'thons')) # display -1


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-python-list

Exercise 54

Write a python program as a function which takes as a parameter a string s and which returns another string obtained from s by removing the spaces at the beginning of the string s and the spaces at the end of the string s without using the lstrip() neither any predefined method. Exemple if
s = "     Hello    "
, the function returns the string
"Hello"

Solution

def removeSpace(s):
      n = len(s)
      
      # initializing the number of existing space at the end of s
      j = 0
      while(s[n-1-j]) == " ":
            j = j + 1
      s = s[:n-j]
      
      # initializing the number of existing space at the begining of s
      i = 0
      while s[i] == " ":
            i = i + 1
      s = s[i:]
      return s

# Testing algorithm 
s = "       Hello World           "
print("s with spaces : " ,"'"+ s +"'") # display : s with spaces :  '       Hello World           '
print("s without spaces:" ,"'"+ removeSpace(s)+"'") # display : s without spaces: 'Hello World'


my-courses.net

Tuesday, October 20, 2020

python-courses-python-exercises-python-tutorials-python-formation

Python Fun Quiz is a free quiz you can play on your phone. Our core belief is that learning is done through fun. Everything in our app is designed so that you can enjoy yourself the most, while learning. Having fun doesn't mean the content you'll get is of poor quality. On the contrary, we believe that the humorous touch increases the learning experience and allows the user to remember the material and avoids frustation and despair, which can easily occur with technical material.
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Python-courses-python-exercises-games-Python-courses-

Exercise 68

Write a python algorithm that find the number of common characters in two strings s1 and s2. Example if s = "Hello" and s2 = "World", the shared characters are 'l' and 'o', then the algorithm returns 2.

Solution

s1 = "Hello"
s2 = "World"

# initializing counter
counter = 0

# creating and initializing a string by deleting the repeated characters in s1
s = ""
for x in s1:
    if x not in s:
        s = s + x
for x in s:
    if x in s2:
        counter = counter + 1

# display the number  of common characters in strings s1 and s2
print(counter) # display 2


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

Python is an interpreted high-stage programming language for fashionable-cause programming. Created by using Guido van Rossum and primary released in 1991, Python has a design philosophy that emphasizes code readability, and a syntax that allows programmers to specific concepts in fewer traces of code, appreciably the use of substantial whitespace. It gives constructs that enable clear programming on each small and huge scales. Python features a dynamic kind gadget and automated reminiscence management. It supports a couple of programming paradigms, inclusive of object-oriented, vital, purposeful and procedural, and has a large and complete standard library.
Python is an interpreted, excessive-stage and preferred-cause programming language. Python's layout philosophy emphasizes code readability with its incredible use of great whitespace. Its language constructs and object-oriented approach purpose to help programmers write clear, logical code for small and big-scale projects.
Python become conceived within the late 1980 by way of Guido van Rossum at Centrum Wiskunde & Informatica (CWI) in the Netherlands as a successor to the ABC programming language, which changed into inspired via SETL),able to exception dealing with and interfacing with the Amoeba running system. Its implementation began in December 1989. Van Rossum shouldered sole responsibility for the venture, because the lead developer, till 12 July 2018, whilst he introduced his "everlasting excursion" from his obligations as Python's Benevolent Dictator For life, a identify the Python community bestowed upon him to reflect his lengthy-term commitment because the challenge's leader selection-maker. He now stocks his management as a member of a five-individual steering council.In January 2019, energetic Python center developers elected Brett Cannon, Nick Coghlan, Barry Warsaw, Carol inclined and Van Rossum to a five-member "guidance Council" to steer the mission. Guido van Rossum has seeing that then withdrawn his nomination for the 2020 steerage council.



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Monday, October 19, 2020

Python-courses-python-exercises-python-exception-python-pip

Exercise 55

Write a python program as a function which takes as parameters a string s and which returns a string obtained from the string s by transforming each uppercase character into a lowercase character and vice versa without using the swapcase() method. Example if s = "Hello Wordls!" , the function returns the string "hELLO wORLD!"

Solution

def mySwapcase(s):
    
    # initializing the swapped string
    s_swap = ""
    
    # iterate over all characters of s 
    #and testing if the character is in uppercase or lowercase
    for x in s:
        if x.isupper():
            
            # swapping the character
            x = x.lower()
            s_swap = s_swap + x
        elif  x.islower():
            # swapping the character
            x = x.upper()
            s_swap = s_swap + x
        else:
            s_swap = s_swap + x
            
    return s_swap

# test and display result
print(mySwapcase("Hello World !")) # The output is : hELLO wORLD !


Younes Derfoufi
my-courses.net
python-courses-python-exercises-python-tutorials-python-formation

Python builtins provides an smooth manner to choose and show builtins function brought with the Python programming language. all documented functions are based on version 3.x.
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Sunday, October 18, 2020

Python-courses-python-exercises-games-Python-courses-

Exercise 53

Using Exercise 51, create a python program as a function which takes as a parameter a string s and which returns the same string in lowercase without using the lower() method. You can use the chr() and ord() methods.

Solution

def toLowercase(s):
    # by using the exercise 51 we can obtain the lists of all upercase characters and lowercase characters:
    uppercase_characters = [chr(i) for i in range(65 , 91)]
    lowercase_characters =  [chr(i) for i in range(97 , 122)]
    # then we can obtain a lowercase characters from uppercase characters by adding 32 to its ascii code
    
    # initializing the searched string
    s_lower = ""
    for x in s:
        if x in uppercase_characters:
            x = chr(ord(x) + 32)
            s_lower = s_lower + x
        else :
            s_lower = s_lower + x
            
    return s_lower
print(toLowercase("PYTHON COURSES"))
# The output is : python courses


Younes Derfoufi
my-courses.net
Python-courses-python-exercises-games-Python-courses-

Exercise 52

Using Exercise 51, create a python program as a function which takes as a parameter a string s and which returns the same string in uppercase without using the upper() method. You can use the chr() and ord() methods.

Solution

def toUppercase(s):
    # by using the exercise 51 we can obtain the lists of all upercase characters and lowercase characters:
    uppercase_characters = [chr(i) for i in range(65 , 91)]
    lowercase_characters =  [chr(i) for i in range(97 , 122)]
    # then we can obtain a uppercase charcter from lowercase character by by subtracting 32 to its ascii code
    
    # initializing the searched string
    s_upper = ""
    for x in s:
        if x in lowercase_characters:
            x = chr(ord(x) -32)
            s_upper = s_upper + x
        else:
            s_upper = s_upper + x
            
    return s_upper
print(toUppercase("Python Programming"))
# The output is : PYTHON PROGRAMMING


Younes Derfoufi
my-courses.net

Python Exercises With Solutions

  1. Exercises on Python Strings
  2. Exercises on Python lists
  3. OOP Exercices with solutions
  4. Exercises on Python File I/O
  5. Python Dictionary Exercises
  6. Python Sets Exercises
  1. Python Arithmetic Exercises
  2. Equations & System Of Equations
  3. Polynomials and Functions
  4. Python Arithmetic Exercises 
  5. Numpy, Matplolib, Sympy , Scipy - Exercises
  6. Python Arithmetic Exercises
  1. Python GUI Tkinter Exercises



Younes Derfoufi

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