for atom in atoms[0:s0 - 1]:
atom.props['inRing'] = False
for atom in atoms[s0:]:
atom.props['inRing'] = True
# Label atoms
atoms[0].label = '*1'
if a > 1:
atoms[1].label = '*4'
if a > 2:
atoms[-1].label = '*5'
if a > 3:
for i, atom in enumerate(atoms[2:-1]):
atom.label = '*{0}'.format(i + 6)
# Add to group
for atom in reversed(atoms):
new_group.addAtom(atom)
# Add bond to newly added atoms
new_group.addBond(
GroupBond(new_group.atoms[1], atoms[-1], order=[1, 2, 3, 1.5]))
# Create bonds
if a > 1:
bonds = [
GroupBond(atoms[i], atoms[i + 1], order=[1, 2, 3, 1.5])
for i in range(a - 1)
]
for bond in bonds:
new_group.addBond(bond)
# Add remaining atoms
if b > 0:
# Create atoms
