Exercise 09-11:
Create a program that reads a file and creates a dictionary where each key is a word and each value is the number of occurrences in the file.
Answer:
##############################################################################
# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 09/exercise-09-11.py.py
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import sys
if len(sys.argv) != 2:
print("\nUsage: exercise-09-11.py file1\n\n\n")
sys.exit(1)
name = sys.argv[1]
counter = {}
file = open(name, "r", encoding="utf-8")
for line in file:
line = line.strip().lower()
words = line.split()
for word in words:
if word in counter:
counter[word] += 1
else:
counter[word] = 1
file.close()
for key in counter:
print(f"{key} = {counter[key]}")