File: test_traj_bytesio.py

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python-ase 3.21.1-2
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def test_traj_bytesio():
    from ase.io import iread, write
    from ase.build import bulk
    from ase.collections import g2
    import io

    images = [bulk('Si') + bulk('Fe')] + list(g2)

    buf = io.BytesIO()
    write(buf, images, format='traj')
    txt = buf.getvalue()

    buf = io.BytesIO()
    buf.write(txt)
    buf.seek(0)

    images2 = list(iread(buf, format='traj'))

    for atoms1, atoms2 in zip(images, images2):
        assert atoms1 == atoms2