import functools
def map_point(val):
double = val * 2
if double < 10:
return double
else:
return functools.reduce(lambda x, y: x + y, map(int, str(double)))
def checkio(data):
charseq = lambda x: ord(x) - 48
clean = lambda L: [x for x in L if x.isalpha() or x.isdigit()]
total = sum(
x if i % 2 else map_point(x)
for i, x in enumerate(map(charseq, reversed(clean(data))))
)
mod = total % 10
final = 10 - mod if mod else 0
return [str(final), total]
# These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert (checkio("799 273 9871") == ["3", 67]), "First Test"
assert (checkio("139-MT") == ["8", 52]), "Second Test"
assert (checkio("123") == ["0", 10]), "Test for zero"
assert (checkio("999_999") == ["6", 54]), "Third Test"
assert (checkio("+61 820 9231 55") == ["3", 37]), "Fourth Test"
assert (checkio("VQ/WEWF/NY/8U") == ["9", 201]), "Fifth Test"
http://www.checkio.org/mission/check-digit/