File: test_parallel.py

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python-ase 3.21.1-2
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def test_parallel():
    from ase import Atoms
    from ase.io import read, write
    from ase.parallel import world

    n = world.rank + 1
    a = Atoms('H' * n)
    name = 'H{}.xyz'.format(n)
    write(name, a, parallel=False)
    b = read(name, parallel=False)
    assert n == len(b)