Exercise 93

1 - Write a function named count_characters() which accepts a character string and which returns the occurrence of the characters contained in the string in the form of a dictionary.
2 - Write a function named count_words() which accepts a character string and which returns the occurrence of the words contained in the string as a dictionary.

Solution

Question 1

def count_characters(s):
    d = dict ({})
    listUnique = []
    for c in s:
        if c not in listUnique and c!= ' ':
            listUnique.append (c)
            d [c] = s.count (c)
            
    return d
# Example
s = "Python Programming"
print (count_characters(s))
# The output is:
# {'P': 2, 'y': 1, 't': 1, 'h': 1, 'o': 2, 'n': 2, 'r': 2, 'g': 2, 'a': 1, 'm': 2, 'i': 1}

Question 2

def count_words (s):
    d = dict ({})
    listUnique = []
    listWords = s.split()
    for word in listWords:
        if word not in listUnique:
            listUnique.append(word)
            d[word] = listWords.count(word)
            
    return d
# Example
s = "Python is programming language and is the most used language"
print (count_words(s))
# The output is:
{'Python': 1, 'is': 2, 'programming': 1, 'language': 2, 'and': 1, 'the': 1, 'most': 1, 'used': 1}

Younes Derfoufi
my-courses.net

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Python is a popular fashionable-motive programming language that can be used for a wide kind of applications. It includes excessive-stage records structures, dynamic typing, dynamic binding, and plenty of more capabilities that make it as useful for complicated software improvement as it is for scripting or "glue code" that connects components collectively. it could additionally be extended to make device calls to almost all operating structures and to run code written in C or C++. because of its ubiquity and capacity to run on nearly every machine structure, Python is a typical language determined in a spread of various applications.

Exercise 92

Write a python program as a function which takes a string s as parameter and returns True if the string s contains at least one uppercase character and False otherwise.

Solution

def containsUpper(s):
    
     # define and initialize a variable which counts the number of capitals
     counter = 0
    
     # browse the characters in the string s
     for x in s:
          # increment the counter each time the character encountered is in uppercase
          if x.isupper ():
               counter = counter + 1
     if counter> 0:
          return True
     else:
          return False
# Example
print (containsUpper ("djangoFramework")) # prints True
print (containsUpper ("djangoframework")) # prints false

Younes Derfoufi
my-courses.net

Exercise 89

Write a Python algorithm which determines the list of repeated charcters in given string. Example: if s = "Programming language", the algorithm returns the list:

['r', 'g', 'a', 'm', 'n']

Solution

# create a function to test if given character is repeated within a given string
def isRepeated(s,c):
    counter = 0
    for x in s:
        if x == c:
            counter = counter + 1
    if counter >= 2:
        return True
    else:
        return False
# create a function that returns the list of all repeated characters
def repeated(s):
    # initializing the list of all repeated characters
    listRepeated = []
    for x in s:
        if isRepeated(s , x) and x and x != " " and x not in listRepeated:
            listRepeated.append(x)
    return listRepeated

# Example
s = "programming language"
print("List of repeated characters in s: " , repeated(s)) 
# The output is : List of repeated characters in s:  ['r', 'g', 'a', 'm', 'n']

Younes Derfoufi
my-courses.net

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Exercise 93

Write a Python program which wrap a given string into a paragraph of given width Solution

import textwrap
def wrapText(s , w):
    return textwrap.fill(s,w)

# Example
s = "Python is open source programming language"
print(wrapText(s , 20))
"""
The out put is:
Python is open
source programming
language
"""

Younes Derfoufi
my-courses.net

Exercise 91 ***

Write a python algorithm which determines the common words with maximum length of two strings text T1 and T2. Example if: T1 = "Python created by Guidorossum is open source programming language. Python was created on 1991" and T2 = "Python created by Guidorossum is the most popular programming language Guidorossum", the algorithm returns the list:

['Guidorossum', 'programming']

Solution

#creating a method which determines the list of common words in T1 and T2
def commonWords(T1 , T2):
    # converting the texts into lists
    listWords_in_T1 = T1.split()
    listWords_in_T2 = T2.split()

    # initializing the common words
    listCommon_words = []
    for word in listWords_in_T1 :
        if word in listWords_in_T2 and word not in listCommon_words:
            listCommon_words.append(word)
    return listCommon_words

# Creating a methode that determines the common word with maximum length
def commonMax(T1, T2):
    listCommon_words = commonWords(T1 , T2)
    # initializing the maximum length
    maxLength = 0
    for word in listCommon_words:
        if len(word) >= maxLength:
            maxLength = len(word)
            
    # searching the the common words of maximum length
    listCommonWordMax = []
    for word in listCommon_words:
        if len(word) == maxLength:
            listCommonWordMax.append(word)
    return listCommonWordMax

T1 = "Python created by Guidorossum is open source programming language. Python was created on 1991"
T2 = "Python created by Guidorossum is the most popular programming language Guidorossum"
print(commonMax(T1 , T2))
# The output is: ['Guidorossum', 'programming']

Younes Derfoufi
my-courses.net