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split + two key sorted solution in Clear category for Sort by Extension by kdim
from typing import List
def sort_by_ext(files: List[str]) -> List[str]:
s = lambda x: x.split('.')
k = lambda x: (s(x)[-1] if s(x)[-2] else s(x)[0], s(x)[0])
return sorted(files, key = k)
if __name__ == '__main__':
print("Example:")
print(sort_by_ext(['1.cad', '1.bat', '1.aa']))
# These "asserts" are used for self-checking and not for an auto-testing
assert sort_by_ext(['1.cad', '1.bat', '1.aa']) == ['1.aa', '1.bat', '1.cad']
assert sort_by_ext(['1.cad', '1.bat', '1.aa', '2.bat']) == ['1.aa', '1.bat', '2.bat', '1.cad']
assert sort_by_ext(['1.cad', '1.bat', '1.aa', '.bat']) == ['.bat', '1.aa', '1.bat', '1.cad']
assert sort_by_ext(['1.cad', '1.bat', '.aa', '.bat']) == ['.aa', '.bat', '1.bat', '1.cad']
assert sort_by_ext(['1.cad', '1.', '1.aa']) == ['1.', '1.aa', '1.cad']
assert sort_by_ext(['1.cad', '1.bat', '1.aa', '1.aa.doc']) == ['1.aa', '1.bat', '1.cad', '1.aa.doc']
assert sort_by_ext(['1.cad', '1.bat', '1.aa', '.aa.doc']) == ['1.aa', '1.bat', '1.cad', '.aa.doc']
assert sort_by_ext(["1.cad","2.bat","1.aa","1.bat"]) == ["1.aa","1.bat","2.bat","1.cad"]
print("Coding complete? Click 'Check' to earn cool rewards!")
Feb. 1, 2021
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