minor fixes for optional types and potcar spec handling in neb docs

Author: esoteric-ephemera

emmet-core/emmet/core/neb.py

@@ -118,8 +118,8 @@ def from_directory(
                 vasprun_file=vasp_files["standard"]["vasprun_file"],
                 outcar_file=vasp_files["standard"]["outcar_file"],
                 contcar_file=vasp_files["standard"]["contcar_file"],
-                volumetric_files=vasp_files["standard"]["volumetric_files"],
-                oszicar_file=vasp_files["standard"]["oszicar_file"],
+                volumetric_files=vasp_files["standard"].get("volumetric_files",[]),
+                oszicar_file=vasp_files["standard"].get("oszicar_file",None),
                 vasprun_kwargs={
                     "parse_potcar_file": False,
                 },

emmet-core/emmet/core/tasks.py

@@ -955,6 +955,9 @@ def _parse_orig_inputs(
     }
     suffix = suffix or ""
     for filename in dir_name.glob("*".join(f"{suffix}.".split("."))):
+        if "POTCAR.spec" in str(filename):
+            # Can't parse POTCAR.spec files
+            continue
         for name, vasp_input in input_mapping.items():
             if f"{name}{suffix}" in str(filename):
                 if name == "POTCAR":