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functools for quest solution in Clear category for Frequency Sorting by alterGNU
import functools
reverse_num = lambda x,y : y[0]-x[0] if y[0]!=x[0] else x[1]-y[1]
def frequency_sorting(numbers):
final=[]
new=sorted([(numbers.count(i),i) for i in set(numbers)], key=functools.cmp_to_key(reverse_num))
for (c,i) in new:
final=final+[i]*c
return final
if __name__ == '__main__':
print("Example:")
print(frequency_sorting([1, 2, 3, 4, 5]))
#These "asserts" using only for self-checking and not necessary for auto-testing
assert frequency_sorting([1, 2, 3, 4, 5]) == [1, 2, 3, 4, 5], "Already sorted"
assert frequency_sorting([3, 4, 11, 13, 11, 4, 4, 7, 3]) == [4, 4, 4, 3, 3, 11, 11, 7, 13], "Not sorted"
assert frequency_sorting([99, 99, 55, 55, 21, 21, 10, 10]) == [10, 10, 21, 21, 55, 55, 99, 99], "Reversed"
print("Coding complete? Click 'Check' to earn cool rewards!")
June 20, 2021
