Best Stock [最大 键]

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思路: 用 max(dict,key=dict.get) 方法 返回key

def best_stock(data):
    # your code here

    return max(data,key=dict.get)


if __name__ == '__main__':
    print("Example:")
    print(best_stock({
        'CAC': 10.0,
        'ATX': 390.2,
        'WIG': 1.2
    }))

    # These "asserts" are used for self-checking and not for an auto-testing
    assert best_stock({
        'CAC': 10.0,
        'ATX': 390.2,
        'WIG': 1.2
    }) == 'ATX', "First"
    assert best_stock({
        'CAC': 91.1,
        'ATX': 1.01,
        'TASI': 120.9
    }) == 'TASI', "Second"
    print("Coding complete? Click 'Check' to earn cool rewards!")