In my Python EDL it works

I would like to give some feedback about ...

From: http://www.checkio.org/mission/count-inversions/solve/

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My Code:

def count_inversion(seq, k=0):
    seq=list(seq)
    for x in range(len(seq)-1):
        if seq[x]>seq[x+1]:
            seq[x],seq[x+1] = seq[x+1], seq[x]
            return count_inversion(seq, k+1)
    return k

if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert count_inversion((1, 2, 5, 3, 4, 7, 6)) == 3, "Example"
    assert count_inversion((0, 1, 2, 3)) == 0, "Sorted"
    assert count_inversion((99, -99)) == 1, "Two numbers"
    assert count_inversion((5, 3, 2, 1, 0)) == 10, "Reversed"