Solution Exercise 81: Python algorithm to find the number of occurrences of all word in given string text

Exercise 81

Write a Python algorithm as function which takes as parameter a string s and that return the dictionary whose keys are the words that making up the string s and whose values are the number of occurrences of words within the string Text s. Example: if s = "I use Python for datascience but I don't use Python for mobile", the algorithm returns the dictionary:

d = {'I': 2, 'use': 2, 'Python': 2, 'for': 2, 'datascience': 1, 'but': 1, "don't": 1, 'mobile': 1}

Solution

def wordOccurrence(s):
    
    # initializing the dictionary that we want to obtain
    d = dict({})
    
    # convrting the the string s into a list
    listWords = s.split()
    
    # iterate over all word in listWords 
    # and adding the number of occurrences of all word to the dictionary d
    for word in listWords:
        d[word] = listWords.count(word)
    
    return d

# Example
s = "I use Python for datascience but I don't use Python for mobile"
print(wordOccurrence(s))
# the output is : 
#{'I': 2, 'use': 2, 'Python': 2, 'for': 2, 'datascience': 1, 'but': 1, "don't": 1, 'mobile': 1}