find median value in list

I would like to give some feedback about task of finding median value in list.

In Spyder using Python 3.5 the below code works perfectly:

def checkio(data):
    return sorted(data)[round(len(data)/2)] if (len(data) % 2 == 1) \
        else (sorted(data) [int(len(data)/2 - 1)] + sorted(data)[int(len(data)/2)]) / 2.0

I get the right value: 49999.5 for this test: checkio(list(range(100000)))

But checkio says that this code returns with 6.

Thank you!

From: https://checkio.org/mission/median/solve/

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