
def _tsase_func():
    atoms = _get_ca()
    sp = atoms.get_scaled_positions()
    for i in range(len(atoms)):
        for j in range(3):
            while sp[i][j] > 1.0:
                sp[i][j] -= 1.0
            while sp[i][j] < 0.0:
                sp[i][j] += 1.0
    atoms.set_scaled_positions(sp)

_tsase_func()

