f spc import

Author: alongd

arc/species/species.py

@@ -7,6 +7,7 @@
 import numpy as np
 import os
 from math import isclose
+from typing import TYPE_CHECKING
 
 import arc.molecule.element as elements
 from arc.common import (SYMBOL_BY_NUMBER,
@@ -35,7 +36,6 @@
                                parse_polarizability,
                                process_conformers_file,
                                )
-from arc.reaction import ARCReaction
 from arc.species import conformers
 from arc.species.converter import (check_isomorphism,
                                    check_xyz_dict,
@@ -57,6 +57,9 @@
 from arc.species.perceive import perceive_molecule_from_xyz, is_mol_valid
 from arc.species.vectors import calculate_angle, calculate_distance, calculate_dihedral_angle
 
+if TYPE_CHECKING:
+    from arc.reaction import ARCReaction
+
 logger = get_logger()
 
 valid_chars, minimum_barrier = settings['valid_chars'], settings['minimum_barrier']