Add reverse-phi information to master h5 file of Eiger

put_reversephi_info.py

# This code will be unnecessary when new Eiger firmware offically writes this information

import h5py

def run(h5in):
    h5 = h5py.File(h5in, "a")

    if "/entry/sample/depends_on" not in h5:
        h5["/entry/sample/depends_on"] = "/entry/sample/transformations/omega"

    if "/entry/sample/transformations" not in h5:
        grp = h5.create_group("/entry/sample/transformations")
    else:
        grp = h5["/entry/sample/transformations"]
    grp.attrs['NX_class'] = "NXtransformations"
    
    if "omega" not in grp:
        omega = h5["/entry/sample/goniometer/omega"]
        ds = grp.create_dataset("omega", omega.shape, dtype=omega.dtype, data=omega)
    else:
        ds = grp["omega"]

    ds.attrs['units'] = 'degree'
    ds.attrs['transformation_type'] = 'rotation'
    ds.attrs['vector'] = (-1., 0., 0.)
    ds.attrs['offset'] = (0., 0., 0.)
    ds.attrs['depends_on'] = '.'
    h5.close()
if __name__ == "__main__":
    import sys
    h5in = sys.argv[1]
    run(h5in)

>     if "/entry/sample/transformations" not in h5:
>        grp = h5.create_group("/entry/sample/transformations")
>    else:
>        grp = h5["/entry/sample/transformations"]

This can be simplified by h5.require_group(). Thanks Takanori.