worth-it

#!/usr/bin/env python3
# -*- coding: utf-8 -*-


def read_data():
    data = []
    while True:
        text = input()
        if text == '':
            break
        try:
            sp = text.split()
            (value, cost) = list(map(float, sp))
            data.append((cost / value, value, cost, text))
        except ValueError:
            pass
    return data


def main():
    print('Enter data table (last line should be empty): value cost')
    print()

    data = sorted(read_data())
    if len(data):
        print('%10s | %10s | %10s' % ("Ratio", "Value", "Cost"))
        for ratio, _, _, orig_value in data:
            print('%10.2f | %10s | %10s' % tuple([ratio, ] + orig_value.split()))
        print()
        print('Best choose is %s' % data[0][-1])


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        pass