def align_bulge_disk_phi_tag_from_align_bulge_disk_phi(align_bulge_disk_phi):
if not align_bulge_disk_phi:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>elif align_bulge_disk_phi:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>
Generate a tag for if the bulge and disk of a bulge-disk system are aligned or not, to customize phase names \
    based on the bulge-disk model. This changes the phase name 'phase_name' as follows:

    bd_align_phi = False -> phase_name
    bd_align_phi = True -> phase_name_bd_align_phi