Apparent bug

Hi.

I'm having a problem with this puzzle. My code passes the asserts but then an error appears from outside my code. The error is -

TypeError: 'generator' object has no attribute 'getitem', min, 5, , 9 "min(abs(i) for i in range(-10, 10))"

This is the third time I've had one of these puzzles fail. The other two were Python 2/3 issues as the asserts were plain strings but the parameters being passed were unicode, which would have been fine in Python 3 but caused errors in Python 2. I'd recommend that the parameters passed to python 2 code be standard strings or, if that doesn't appeal to you, that at a minimum the fact that the parameters are unicode be added to the parameter specification of the description of the puzzle.

Ian Simcock.

From: http://www.checkio.org/mission/min-max/solve/

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My Code:

def min(*args, **kwargs):
    key = kwargs.get("key", None)
    sort_source = args if len(args) > 1 else args[0]
    min_value = sort_source[0]
    if key:
        min_key = key(sort_source[0])
        for entry in sort_source[1:]:
            new_key = key(entry)
            if new_key < min_key:
                min_value = entry
                min_key = new_key
    else:
        for entry in sort_source[1:]:
            if entry < min_value:
                min_value = entry

    return min_value


def max(*args, **kwargs):
    key = kwargs.get("key", None)
    sort_source = args if len(args) > 1 else args[0]
    max_value = sort_source[0]
    if key:
        max_key = key(sort_source[0])
        for entry in sort_source[1:]:
            new_key = key(entry)
            if new_key > max_key:
                max_value = entry
                max_key = new_key
    else:
        for entry in sort_source[1:]:
            if entry > max_value:
                max_value = entry

    return max_value


if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert max(3, 2) == 3, "Simple case max"
    assert min(3, 2) == 2, "Simple case min"
    assert max([1, 2, 0, 3, 4]) == 4, "From a list"
    assert min("hello") == "e", "From string"
    assert max(2.2, 5.6, 5.9, key=int) == 5.6, "Two maximal items"
    assert min([[1, 2], [3, 4], [9, 0]], key=lambda x: x[1]) == [9, 0], "lambda key"