Python Program to Get word frequency in percentage

In this article, we will learn how to calculate word frequency as percentages in Python. Given a list of strings, we'll find what percentage each word represents of the total word count.

Formula

Word Frequency (%) = (Occurrence of word / Total words) × 100

Method 1: Using Counter() from collections

The Counter() function counts hashable objects and returns a dictionary-like object. The join() function connects sequence elements into a single string ?

from collections import Counter

# Input list of strings
input_strings = ["hello tutorialspoint", "python codes", "tutorialspoint for python", "see python codes tutorialspoint"]
print("Input list:")
print(input_strings)

# Join all strings and split into individual words
all_words = " ".join(input_strings).split()

# Count word frequencies
word_counts = Counter(all_words)
total_words = sum(word_counts.values())

# Calculate percentages
word_percentages = {word: (count / total_words) * 100 for word, count in word_counts.items()}

print("\nWord frequency percentages:")
for word, percentage in word_percentages.items():
    print(f"{word}: {percentage:.2f}%")

Input list:
['hello tutorialspoint', 'python codes', 'tutorialspoint for python', 'see python codes tutorialspoint']

Word frequency percentages:
hello: 9.09%
tutorialspoint: 27.27%
python: 27.27%
codes: 18.18%
for: 9.09%
see: 9.09%

Method 2: Using count() Function

This approach manually counts each word occurrence using the count() method ?

# Input list of strings
input_strings = ["hello tutorialspoint", "python codes", "tutorialspoint for python", "see python codes tutorialspoint"]

# Join all strings and split into words
all_words = " ".join(input_strings).split()
total_words = len(all_words)

# Calculate percentages using count()
word_percentages = {}
for word in all_words:
    if word not in word_percentages:
        count = all_words.count(word)
        word_percentages[word] = (count / total_words) * 100

print("Word frequency percentages:")
for word, percentage in word_percentages.items():
    print(f"{word}: {percentage:.2f}%")

Word frequency percentages:
hello: 9.09%
tutorialspoint: 27.27%
python: 27.27%
codes: 18.18%
for: 9.09%
see: 9.09%

Method 3: Using operator.countOf()

The operator.countOf() function counts occurrences of a value in a sequence ?

import operator as op

# Input list of strings
input_strings = ["hello tutorialspoint", "python codes", "tutorialspoint for python", "see python codes tutorialspoint"]

# Join all strings and split into words
all_words = " ".join(input_strings).split()
total_words = len(all_words)

# Calculate percentages using operator.countOf()
word_percentages = {}
for word in all_words:
    if word not in word_percentages:
        count = op.countOf(all_words, word)
        word_percentages[word] = (count / total_words) * 100

print("Word frequency percentages:")
for word, percentage in word_percentages.items():
    print(f"{word}: {percentage:.2f}%")

Word frequency percentages:
hello: 9.09%
tutorialspoint: 27.27%
python: 27.27%
codes: 18.18%
for: 9.09%
see: 9.09%

Comparison

Conclusion

Use Counter() for efficient word frequency calculation in large datasets. The count() method works well for smaller lists, while operator.countOf() provides an alternative when working with the operator module.