refactor: move drop_none_or_empty to misc module

Author: wpbonelli

modflow_devtools/misc.py

@@ -4,6 +4,7 @@
 import traceback
 from _warnings import warn
 from ast import literal_eval
+from collections.abc import Iterable
 from contextlib import contextmanager
 from enum import Enum
 from functools import wraps
@@ -565,3 +566,24 @@ def try_get_enum_value(v: Any) -> Any:
     of an enumeration, otherwise return it unaltered.
     """
     return v.value if isinstance(v, Enum) else v
+
+
+def try_literal_eval(value: str) -> Any:
+    """
+    Try to parse a string as a literal. If this fails,
+    return the value unaltered.
+    """
+    try:
+        return literal_eval(value)
+    except (SyntaxError, ValueError):
+        return value
+
+
+def drop_none_or_empty(path, key, value):
+    """
+    Drop dictionary items with None or empty values.
+    For use with `boltons.iterutils.remap`.
+    """
+    if value is None or (isinstance(value, Iterable) and not any(value)):
+        return False
+    return True

modflow_devtools/models.py

@@ -21,13 +21,7 @@
 from pooch import Pooch
 
 import modflow_devtools
-from modflow_devtools.misc import get_model_paths
-
-
-def _drop_none_or_empty(path, key, value):
-    if value is None or value == "":
-        return False
-    return True
+from modflow_devtools.misc import drop_none_or_empty, get_model_paths
 
 
 def _model_sort_key(k) -> int:
@@ -421,7 +415,7 @@ def index(
 
         with self._registry_file_path.open("ab+") as registry_file:
             tomli_w.dump(
-                remap(dict(sorted(files.items())), visit=_drop_none_or_empty),
+                remap(dict(sorted(files.items())), visit=drop_none_or_empty),
                 registry_file,
             )