How to convert a function to one line

I would like to convert this multi-line function to a single line.

def preveri_zaporedje(besede):
    z=1
    if ni_ponavljanj(besede):
        while z<len(besede):
            if lahko_sledi(besede[z-1],besede[z]):
                z+=1
            else:
                return False
    else:
        return False
    return True