testreduce.py

from functools import *

# def printandreturn(left, right):

#     seen, lastres = left
#     if lastres == False:
#         return seen, False
#     if seen[0] == right:
#         return seen, True
#     return seen, len(seen)<2 is True

#     # else: #len(seen) > 1
#     #     return seen, False



# def allunique(li):
#     if len(li):
#         return (reduce(printandreturn, li, ([li[0]], True)))[1]
#     return False


# def printandreturn_(left, right):

#     seen, lastres = left
#     if lastres == False:
#         return seen, False
#     if seen == right:
#         return seen, True
#     return seen, False

#printandreturn = lambda left, right: (left[0], False) if (left[1] == False or left[0] != right) else (left[0], True)
allunique = lambda li: (reduce(lambda left, right: (left[0], False) if (left[1] == False or left[0] != right) else (left[0], True), li, (li[0], True)))[1] if len(li) else False


# def printandreturn(left, right):

#     seen, lastres = left
#     if lastres == False:
#         return seen, False
#     if seen == right:
#         return seen, True
#     return seen, False


# def allunique(li):
#     if len(li):
#         return (reduce(printandreturn, li, (li[0], True)))[1]
#     return False

def test():
        
    assert allunique([False, False]) == True
    assert allunique([9,8,7]) == False
    assert allunique([9,9,9]) == True
    assert allunique([8,9,9]) == False
    assert allunique([True, True]) == True
    assert allunique([True, False, True, True]) == False
    assert(allunique([None, False]) == False)
    assert allunique([None, False]) is False
    assert allunique([None, None]) is True
    assert allunique([]) is False
    assert allunique([2,3,4]) is False
    assert allunique([True, False]) is False
    assert allunique([True, True]) is True
    assert(allunique([False, False]) is True)
    assert allunique([2,4,4]) is False
    assert allunique([None, None, None]) is True
    assert allunique([0, 0, 0]) is True
    assert allunique([0, 1, 0, 0, 0]) is False

    print("tests passed.")

test()