Write a Python program to count the occurrences of each word in a given sentence

In this exercise, you will learn how to count the occurrences of a particular word or each word in a text file. Generally, it is required in the development process to count the occurrence of each word or a particular word in a text document or a given sentence. Here, we have mentioned different ways to achieve this.

Count occurrences of each word in a given sentence using dictionary

In the given example, we first read the sentence from the user using a built-in function input() and store it in a variable, and then, we utilize a dictionary object that stores the word as the key and its count as the corresponding value. We loop through each word and count the occurrences of each word, adding them to the dictionary with count 1.

def word_count(str): # Create an empty dictionary counts = dict() words = str.split() # Loop through each line of the file for word in words: if word in counts: counts[word] += 1 else: counts[word] = 1 return counts # get input from user string = input("Please enter sentence: ") # Print the number of occurrences of word print( word_count(string))

Output of the above code -

Pleae enter sentence: Python is a high level open source programming language. Python is an extremely powerful language. {'Python': 2, 'is': 2, 'a': 1, 'high': 1, 'level': 1, 'open': 1, 'source': 1, 'programming': 1, 'language.': 2, 'an': 1, 'extremely': 1, 'powerful': 1}

Count occurrences of a word in a given file using count() function

In the above examples, we got the occurrence of each word, but what if we need to get the occurrence of a particular word in a file? Here is the simplest solution to this. We can use the count() function to count the occurrences of a particular word in a given file.

Suppose we have a text file 'demo.txt' that contains the following text-

Python is a high level open source programming language. Python is an extremely powerful language.

#get file object reference to the file file = open("C:\workspace\python\data.txt", "r") # read content of file to string data = file.read() # get number of occurrences of the substring in the string occurrences = data.count("python") print('Number of occurrences of the word :', occurrences)

Output of the above code -

Number of occurrences of the word : 2

Write a Python program to count the occurrences of each word in a given sentence

All Answers

Count occurrences of each word in a given sentence using dictionary

Count occurrences of a word in a given file using count() function

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