Include module name in python type name strings to disambiguate types when converting.

src/nipanel/_convert.py

@@ -4,7 +4,7 @@
 
 import logging
 from collections.abc import Collection
-from typing import Any
+from typing import Any, Iterable
 
 from google.protobuf import any_pb2
 
@@ -102,7 +102,7 @@ def _get_best_matching_type(python_value: object) -> str:
         container_types.append(Collection.__name__)
 
     best_matching_type = None
-    candidates = [parent.__name__ for parent in underlying_parents]
+    candidates = _get_candidate_strings(underlying_parents)
     for candidate in candidates:
         containers_str = ".".join(container_types)
         python_typename = f"{containers_str}.{candidate}" if containers_str else candidate
@@ -140,3 +140,21 @@ def is_supported_type(value: object) -> bool:
         return True
     except TypeError:
         return False
+
+
+def _get_candidate_strings(candidates: Iterable[type]) -> list[str]:
+    names_to_disambiguate = [
+        "datetime",
+        "DateTime",
+        "timedelta",
+        "TimeDelta",
+    ]
+
+    candidate_names = []
+    for candidate in candidates:
+        if candidate.__name__ in names_to_disambiguate:
+            candidate_names.append(f"{candidate.__module__}.{candidate.__name__}")
+        else:
+            candidate_names.append(candidate.__name__)
+
+    return candidate_names

src/nipanel/converters/builtin.py

@@ -126,7 +126,7 @@ class DTDateTimeConverter(Converter[dt.datetime, timestamp_pb2.Timestamp]):
     @property
     def python_typename(self) -> str:
         """The Python type that this converter handles."""
-        return dt.datetime.__name__
+        return f"{dt.datetime.__module__}.{dt.datetime.__name__}"
 
     @property
     def protobuf_message(self) -> Type[timestamp_pb2.Timestamp]:

tests/unit/test_convert.py

@@ -54,7 +54,7 @@
         (tests.types.MixinIntEnum.VALUE11, "int"),
         (tests.types.MyStrEnum.VALUE1, "str"),
         (tests.types.MixinStrEnum.VALUE11, "str"),
-        (dt.datetime.now(), "datetime"),
+        (dt.datetime.now(), "datetime.datetime"),
         ([False, False], "Collection.bool"),
         ([b"mystr", b"mystr"], "Collection.bytes"),
         ([456.2, 1.0], "Collection.float"),