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I don't know what is gone wrong, but i have some questions. I've passed all tests while running code, but i have SyntaxError in checking solution. As i see, in conditions clearly you wrote "Input: Three arguments and only the first one is required. The first one is a list of datetime objects, the second and the third ones are the datetime objects." I don't know how to show my wonder when i saw this in arguments Fail:sum_light([ new Date(2015, 1, 12, 10, 0, 0), new Date(2015, 1, 12, 10, 10, 10), new Date(2015, 1, 12, 11, 0, 0), new Date(2015, 1, 12, 11, 10, 10) ]) What are this objects do in pytests?????? What is it? new Date?

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