new_fibtest

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Filename: new_fibtest.py
# Author: Jeoi Reqi

"""
Module to generate and display Fibonacci series up to a specified limit.  Eg; n = 9,999,999,999,999,999,999,999,999,999,999 (MAX VALUE).

Or...

('nine nonillion nine hundred ninety-nine octillion nine hundred ninety-nine septillion nine hundred ninety-nine sextillion nine hundred ninety-nine quintillion nine hundred ninety-nine quadrillion nine hundred ninety-nine trillion nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine.')

Requirements:
- Python 3.x

Usage:
1. Import the module in your Python script.
2. Use the 'fib' function to print the Fibonacci series up to a given limit of 'n'.
3. Use the 'fib2' function to obtain the Fibonacci series as a list.
4. Save to 'fiblist.txt' file or exit program.
"""

import string

# Fibonacci numbers module
def fib(n):
    """Print Fibonacci series up to n."""
    a, b = 0, 1
    while b < n:
        print(b, end=' ')
        a, b = b, a + b

def fib2(n):
    """Return Fibonacci series up to n as a list."""
    result = []
    a, b = 0, 1
    while b < n:
        result.append(b)
        a, b = b, a + b
    return result

# Example usage:
if __name__ == "__main__":
    user_input = input("\nEnter the limit for Fibonacci series (MAX: 9,999,999,999,999,999,999,999,999,999,999): ")

    # Remove punctuation from user input
    user_input = user_input.translate(str.maketrans("", "", string.punctuation))

    n = int(user_input)
    fib_list = fib2(n)
    print(fib_list)
    print()

    # Save Option
    save_option = input("Do you want to [SAVE] the Fibonacci series to 'fiblist.txt' or [EXIT] the program?\n1: SAVE\n2: EXIT\nEnter your selection (1 Or 2)\n")
    if save_option == '1':
        with open('fiblist.txt', 'w') as file:
            for number in fib_list:
                file.write(str(number) + '\n')
        print("\nFibonacci series saved to fiblist.txt.\n")
    elif save_option == '2':
        print("\nProgram exited without saving.\n")
    else:
        print("\nInvalid option. Program exited.\n")