descending_order.py

#  Descending Order
#  7 kyu
#  https://www.codewars.com/kata/5467e4d82edf8bbf40000155
#
#               w r i t t e n    b y
#   oooo        https://github.com/lcsm29        .oooo.    .ooooo.
#   `888                                       .dP""Y88b  888' `Y88.
#    888   .ooooo.   .oooo.o ooo. .oo.  .oo.         ]8P' 888    888
#    888  d88' `"Y8 d88(  "8 `888P"Y88bP"Y88b      .d8P'   `Vbood888
#    888  888       `"Y88b.   888   888   888    .dP'           888'
#    888  888   .o8 o.  )88b  888   888   888  .oP     .o     .88P'
#   o888o `Y8bod8P' 8""888P' o888o o888o o888o 8888888888   .oP'
def descending_order(n: int) -> int:
    d = {str(i): 0 for i in range(10)}
    for i in str(n):
        d[i] += 1
    return int(''.join([k * v for k, v in reversed(d.items())]))


if __name__ == '__main__':
    basic_tests = [
        ["descending_order(0)", 0, 0],
        ["descending_order(15)", 15, 51],
        ["descending_order(123456789)", 123456789, 987654321]
    ]
    for test in basic_tests:
        case, n, expected = test
        result = descending_order(n)
        print(f'{case} returns {result}'
              f'{f", expected: {expected}" if result != expected else ""}')


#    _               _                          _   _
#   | |             | |                        | | (_)
#   | |__   ___  ___| |_   _ __  _ __ __ _  ___| |_ _  ___ ___
#   | '_ \ / _ \/ __| __| | '_ \| '__/ _` |/ __| __| |/ __/ _ \
#   | |_) |  __/\__ \ |_  | |_) | | | (_| | (__| |_| | (_|  __/
#   |_.__/ \___||___/\__| | .__/|_|  \__,_|\___|\__|_|\___\___|
#                         | |  written by
#                         |_|  https://codewars.com/users/hiasen
'''hiasen
def Descending_Order(num):
    return int("".join(sorted(str(num), reverse=True)))
'''