First solution in Speedy category for Long Repeat by
from itertools import groupby
if len(line) == 0:
count_dups = [sum(1 for _ in group) for _, group in groupby(line)]
maxVal = count_dups.index(max(count_dups))
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert long_repeat('sdsffffse') == 4, "First"
assert long_repeat('ddvvrwwwrggg') == 3, "Second"
print('"Run" is good. How is "Check"?')
Dec. 20, 2017