Hello world! | Python Tutorials for Kids 13+

Thanks. Sorry I didn’t see this earlier.

Hi Clarence,
The difference between the two lines is that the first is just testing whether a file exists. The second checks whether there is data in the file. A file can exist with nothing in it if, for example, you open it and then close it again without writing any data to it.
Good luck!

nevermind…i figured it out. this is what i had to do

#if os.path.exists(SAVE_FILE_NAME):
if os.path.getsize(SAVE_FILE_NAME) > 0:

Python 3.9.6 (tags/v3.9.6:db3ff76, Jun 28 2021, 15:26:21) [MSC v.1929 64 bit (AMD64)] on win32
Type “help”, “copyright”, “credits” or “license()” for more information.
>>>
= RESTART: D:/Users/temp/AppData/Local/Programs/Python/Python39/address_book_2.py
Traceback (most recent call last):
File “D:/Users/temp/AppData/Local/Programs/Python/Python39/address_book_2.py”, line 190, in
controller = Controller()
File “D:/Users/temp/AppData/Local/Programs/Python/Python39/address_book_2.py”, line 99, in __init__
self.address_book = self.load()
File “D:/Users/temp/AppData/Local/Programs/Python/Python39/address_book_2.py”, line 110, in load
address_book = pickle.load(file_object)
EOFError: Ran out of input
>>>

thanks! i was like oh what i do bad :c

import os

def menu():

limpiar = ‘cls’ if os.name == ‘nt’else ‘clear’
os.system(limpiar)

print(‘\t1 – Nuevo Archivo’)
print(‘\t2 – Abrir’)
print(‘\t3 – Agregar Texto’)
print(‘\t4 – Nombre y Modo del archivo’)
print(‘\t9 – Salir’)

def Inicio():

while Inicio:

print(“‘BIENVENIDO A EDITOR DE TEXTO'”)

menu()

opcion = input(‘ELIJA UNA OPCION INTRODUCIENDO SU NUMERO: ‘)

if opcion == ‘1’:
nombreArchivo =input(‘Escibe el nombre del archivo: ‘)
archivo = open(nombreArchivo, ‘w’)
texto = input(‘Ingrese texto a guardar: \n’)
archivo.write(texto)
archivo.close()

elif opcion == ‘2’:
archivo = open(nombreArchivo, ‘r’)
print(archivo.read())
archivo.close()

elif opcion == ‘3’:

archivo = open(nombreArchivo, ‘a’)
texto2 = input(‘Ingrese texto: \n’)
archivo.write(texto2)
archivo.close()

elif opcion == ‘4’:
archivo = nombreArchivo
print(‘Nombre del archivo: \n’),archivo.name
print(‘Modo actual del archivo: \n’),archivo.mode

elif opcion == ‘9’:
exit()

Inicio()

Thank you for the prompt explanation and thank you very much for writing this wonderful book!

This is covered from pages 212 ff. Basically you change the value of ENCRYPT yourself. When you want to encrypt, set it to True. If you want to decrypt set it to False. . You can write some code to set it from within the program (look at project 3 for inspiration). I didn’t do it in the book because I felt it would make the code a little over complicated.

Alternatively, you could make two programs, one for encryption and one for decryption (where the only difference is the value of ENCRYPT).

There are details of each project with modifications needed for the code to run in Python 3 starting with:
https://python4kids.brendanscott.com/2016/03/19/python-for-kids-python-3-project-2/

Regards,

Brendan

Will there be an updated version of the book for the Python 3 code?

https://honingds.com/blog/raw_input-python/