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April 3, 2018 19:15
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Python - Number to words
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| """ | |
| This script returns a string of a number in letters (**in french**) from a positive integer. | |
| $ python3 number.py 1254 | |
| mille deux-cent cinquante-quatre | |
| It works for numbers from 0 to 999 999 999 999 (1 trillion minus 1). | |
| """ | |
| import sys | |
| SINGLE_NUMBERS = { | |
| 0: "zéro", | |
| 1: "un", | |
| 2: "deux", | |
| 3: "trois", | |
| 4: "quatre", | |
| 5: "cinq", | |
| 6: "six", | |
| 7: "sept", | |
| 8: "huit", | |
| 9: "neuf", | |
| 10: "dix", | |
| 11: "onze", | |
| 12: "douze", | |
| 13: "treize", | |
| 14: "quatorze", | |
| 15: "quinze", | |
| 16: "seize" | |
| } | |
| NUMBER_NAMES = { | |
| "units": { | |
| 1: "et-un", | |
| 2: "deux", | |
| 3: "trois", | |
| 4: "quatre", | |
| 5: "cinq", | |
| 6: "six", | |
| 7: "sept", | |
| 8: "huit", | |
| 9: "neuf" | |
| }, | |
| "tens": { | |
| 1: "dix", | |
| 2: "vingt", | |
| 3: "trente", | |
| 4: "quarante", | |
| 5: "cinquante", | |
| 6: "soixante", | |
| 7: "septente", | |
| 8: "octante", | |
| 9: "nonante" | |
| } | |
| } | |
| def render_tens_units(tens, units): | |
| if units == 0: | |
| return NUMBER_NAMES["tens"][tens] | |
| return NUMBER_NAMES["tens"][tens] + '-' + NUMBER_NAMES["units"][units] | |
| def render(n): | |
| if n < 0 or type(n) is not int: | |
| raise ValueError("'n' must be a positive integer.") | |
| if n < 17: | |
| return SINGLE_NUMBERS.get(n) | |
| if n < 100: | |
| tens, units = divmod(n, 10) | |
| return render_tens_units(tens, units) | |
| if n < 1000: | |
| hundreds, rest = divmod(n, 100) | |
| tens, units = divmod(rest, 10) | |
| if hundreds == 1: | |
| h = "cent" | |
| else: | |
| h = SINGLE_NUMBERS.get(hundreds) + "-cent" | |
| return h + ' ' + render_tens_units(tens, units) | |
| if n < 10000: | |
| thousands, rest = divmod(n, 1000) | |
| if thousands == 1: | |
| t = "mille" | |
| else: | |
| t = SINGLE_NUMBERS.get(thousands) + "-mille" | |
| return t + ' ' + render(rest) | |
| if n < 1000000: | |
| thousands, rest = divmod(n, 1000) | |
| return render(thousands) + "-mille " + render(rest) | |
| if n < 1000000000: | |
| millions, rest = divmod(n, 1000000) | |
| if rest == 0: | |
| return render(millions) + "-millions" | |
| return render(millions) + "-millions " + render(rest) | |
| if n < 1000000000000: | |
| billions, rest = divmod(n, 1000000000) | |
| if rest == 0: | |
| return render(billions) + "-milliards" | |
| return render(billions) + "-milliards " + render(rest) | |
| return | |
| if __name__ == '__main__': | |
| print(render(int(sys.argv[1]))) |
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