Grocery List Creator.py

'''
Grocery List Creator Python program

Created by Joseph C. Richardson, GitHub.com

This is a full functional grocery list Python program example to add to my Python book.
Feel free to copy this Python program example if you like. See what you can do with it.
Please enjoy.
'''
import os

text_colours=(
    '\x1b[31m', # index 0 = red
    '\x1b[32m', # index 1 = green
    '\x1b[33m', # index 2 = yellow
    '\x1b[34m', # index 3 = blue
    '\x1b[35m', # index 4 = purple
    '\x1b[36m', # index 5 = cyan
    '\x1b[37m'  # index 6 = white
    )

title='title grocery list creator'
clear_screen='cls'
single_line_break='\n'
double_line_break='\n\n'
indent=' '*2
dot_space='.'*3
create_list='vgl'
enter=0
decimal_point=100
button1='y'
button2='n'

sentence=[
f'{single_line_break}{indent}grocery list creator', # index 0

f'''{double_line_break}{indent}Press "Enter" after each grocery list item typed.
{indent}Type "vgl", then press "Enter" to view your grocery list output.''', # index 1

f'{double_line_break}{indent}Please type your grocery list items: ', # index 2

f'{double_line_break}{indent}Please type your grocery list item price: $', # index 3

f'{double_line_break}{indent}{text_colours[5]}You have', # indext 4

'items in your grocery list.', # index 5

f'{double_line_break}{indent}Here is your grocery list output:', # index 6

f'{single_line_break}{indent}Your grocery list total:', # index 7

f'''{single_line_break}{indent}Do you wish to add more items to your grocery list?
{single_line_break}{indent}Press "y" or "n" to confirm: ''', # index 8

f'{single_line_break}{indent}Thank you for choosing Grocery List Creator... \
Press "Enter" to exit.', # index 9
]

user_input_item_data=[ ]
user_input_price_data=[ ]

user_input_item_data.append(enter)
user_input_price_data.append(enter)

os.system(title.title())

def items_list():

    while True:
        os.system(clear_screen)
        grocery_list=input(text_colours[5]+sentence[0].title()
        +sentence[1]+sentence[2]).strip()
        user_input_item_data.append(grocery_list)

        if grocery_list==create_list:
            user_input_item_data.remove(create_list)
            item=user_input_item_data
            item.remove(enter)
            break

        try:
            os.system(clear_screen)
            item_price=float(input(sentence[0].title()
            +sentence[1]+sentence[3]).strip())
            user_input_price_data.append(item_price)
        except ValueError:
            user_input_price_data.append(0)

    while True:
        os.system(clear_screen)
        print(sentence[0].title()+sentence[6])

        try:            
            x=1
            for i in item:
                print(f'{single_line_break}{indent}{x}) {dot_space} {i} \
${user_input_price_data[x]/decimal_point}'.title())
                x+=1
        except IndexError:
            item.remove(enter)

        total_sum=user_input_price_data
        
        print(f'{sentence[7]}{text_colours[1]} ${sum(total_sum)/decimal_point}',
              sentence[4],len(item),sentence[5])

        grocery_list=input(sentence[8]).lower().strip()

        user_input_item_data.append(enter)

        if grocery_list==button1:
            items_list()            
            break
        elif grocery_list==button2:
            break

items_list()
os.system(clear_screen)
input(text_colours[6]+sentence[9])