optional

cclib/attribute_parsers/atombasis.py

@@ -140,7 +140,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         # This block comes from `print_orbitals = true/{int}`. Less
         # precision than `scf_final_print >= 2` for `mocoeffs`, but
         # important for `aonames` and `atombasis`.

cclib/attribute_parsers/atomcoords.py

@@ -60,7 +60,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         # Extract the atomic numbers and coordinates of the atoms.
         # TODO: afterparsing for geometries
         line = file_handler.last_line

cclib/attribute_parsers/atomnos.py

@@ -53,7 +53,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         table = utils.PeriodicTable()
         constructed_data = None
         # Extract the atomic numbers

cclib/attribute_parsers/charge.py

@@ -38,7 +38,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         # TODO: ecp charge may be different!
         dependency_list = ["atomnos"]
         line = file_handler.last_line

cclib/attribute_parsers/gbasis.py

@@ -216,7 +216,7 @@ def get_normalization_factor(exp, lx, ly, lz):
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         constructed_data = None
         line = file_handler.last_line
         parsed_gbasis = []

cclib/attribute_parsers/mosyms.py

@@ -118,7 +118,7 @@ def gaussian(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         line = file_handler.last_line
         parsed_data = None
         # Molecular orbital energies and symmetries.

cclib/attribute_parsers/mult.py

@@ -36,7 +36,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         # TODO: ecp charge may be different!
         line = file_handler.last_line
         constructed_data = None

cclib/attribute_parsers/natom.py

@@ -39,7 +39,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         # ccdata is "const" here and we don't need to modify it yet. The driver will set the attr
         dependency_list = ["atomnos"]
         if base_parser.check_dependencies(dependency_list, ccdata, "natom"):

cclib/attribute_parsers/nmo.py

@@ -36,7 +36,7 @@ def gaussian(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         dependency_list = ["moenergies"]
         if base_parser.check_dependencies(dependency_list, ccdata, "nmo"):
             return {nmo.__name__: len(ccdata.monergies[0])}

cclib/attribute_parsers/scfenergies.py

@@ -34,7 +34,7 @@ def psi4(file_handler, ccdata) -> Optional[dict]:
         return None
 
     @staticmethod
-    def qchem(file_handler, ccdata) -> dict | None:
+    def qchem(file_handler, ccdata) -> Optional[dict]:
         line = file_handler.last_line
         constructed_scfenergies = None
         constructed_data = None