feat: delay dandischema.models import in dandi/files/bids.py

Author: candleindark

dandi/files/bids.py

@@ -5,10 +5,9 @@
 from datetime import datetime
 from pathlib import Path
 from threading import Lock
+from typing import TYPE_CHECKING
 import weakref
 
-from dandischema.models import BareAsset
-
 from dandi.bids_validator_deno import bids_validate
 
 from .bases import GenericAsset, LocalFileAsset, NWBAsset
@@ -18,6 +17,9 @@
 from ..misctypes import Digest
 from ..validate_types import ValidationResult
 
+if TYPE_CHECKING:
+    from dandischema.models import BareAsset
+
 BIDS_ASSET_ERRORS = ("BIDS.NON_BIDS_PATH_PLACEHOLDER",)
 BIDS_DATASET_ERRORS = ("BIDS.MANDATORY_FILE_MISSING_PLACEHOLDER",)
 
@@ -84,6 +86,8 @@ def _get_metadata(self) -> None:
 
         This populates `self._asset_metadata`
         """
+        from dandischema.models import BareAsset
+
         with self._lock:
             if self._asset_metadata is None:
                 # Import here to avoid circular import
@@ -236,6 +240,8 @@ def get_metadata(
         digest: Digest | None = None,
         ignore_errors: bool = True,
     ) -> BareAsset:
+        from dandischema.models import BareAsset
+
         bids_metadata = BIDSAsset.get_metadata(self, digest, ignore_errors)
         nwb_metadata = NWBAsset.get_metadata(self, digest, ignore_errors)
         return BareAsset(