FLIP_H = r.Flip('horizontal')
FLIP_V = r.Flip('vertical')
ROT_90 = r.Rotate('90')
ROT_180 = r.Rotate('180')
ROT_270 = r.Rotate('270')
TRA_BACK = r.Transpose('\\')
TRA_FRONT = r.Transpose('/')

RULESET = [
    r.IfClassIs('left_only’).then(FLIP_H + r.ChangeLabel('right_only')),
    (r.IfDatasetIs('Belgium’) * r.IfClassIs('left_only')).then(ROT_180 + r.ChangeLabel('right_only')),
    (r.IfDatasetIs('Belgium’) * r.IfClassIs('left_only')).then(ROT_90 + r.ChangeLabel('straight_ahead_only')),
    (r.IfDatasetIs('Belgium’) * r.IfClassIs('left_only')).then(TRA_BACK + r.ChangeLabel('straight_ahead_only')),
    (r.IfDatasetIs('Belgium’) * r.IfClassIs('left_only')).then(FLIP_V),
    r.IfClassIs('straight_ahead_only').then(ROT_90 + r.ChangeLabel('right_only')),
    r.IfClassIs('straight_ahead_only').then(ROT_270 + r.ChangeLabel('left_only')),
    r.IfClassIs('straight_ahead_only').then(TRA_FRONT + r.ChangeLabel('right_only')),
    r.IfClassIs('straight_ahead_only').then(TRA_BACK + r.ChangeLabel('left_only')),
    r.IfClassIs('straight_ahead_only').then(FLIP_H)
]