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First solution in Clear category for Sort by Extension by linfei2
from typing import List
def sort_by_ext(files: List[str]) -> List[str]:
no_ext = []
for file in files:
if file.rsplit(".",1)[0] == "" or file.rsplit(".",1)[1] == "":
files.remove(file)
no_ext.append(file)
with_ext = sorted(files, key=lambda file: (file.rsplit(".", 1)[1], file.rsplit(".", 1)[0]))
result = sorted(no_ext)
result.extend(with_ext)
return result
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']
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Feb. 6, 2021