Exercise 09-07:
Create a program that reads a text file and generates a paginated output file. Each line must not contain more than 76 characters. Each page should have a maximum of 60 lines. The last line of each page should include the number of the current page and the name of the original 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-09-07.py.py
##############################################################################
# Uma boa fonte de textos para teste é o projeto Gutemberg
# http://www.gutenberg.org/
# Não esqueça de configurar o encoding do arquivo.
#
# Este programa foi testado com Moby Dick
# http://www.gutenberg.org/cache/epub/2701/pg2701.txt
# Gravado com o nome de mobydick.txt
#
WIDTH = 76
LINES = 60
FILENAME = "mobydick.txt"
def check_page(file, line, page):
if line == LINES:
footer = f"= {FILENAME} - Page: {page} ="
file.write(footer.center(WIDTH - 1) + "\n")
page += 1
line = 1
return line, page
def write(file, line, nlines, page):
file.write(line + "\n")
return check_page(file, nlines + 1, page)
input_file = open(FILENAME, encoding="utf-8")
output = open("paginated_output.txt", "w", encoding="utf-8")
page = 1
lines = 1
for line in input_file.readlines():
words = line.rstrip().split(" ")
line = ""
for word in words:
word = word.strip()
if len(line) + len(word) + 1 > WIDTH:
lines, page = write(output, line, lines, page)
line = ""
line += word + " "
if line != "":
lines, page = write(output, line, lines, page)
# To print the number on the last page
while lines != 1:
lines, page = write(output, "", lines, page)
input_file.close()
output.close()