feat: delay dandischema.models import in dandi/misctypes.py

Author: candleindark

dandi/misctypes.py

@@ -14,9 +14,10 @@
 from functools import cache
 import os.path
 from pathlib import Path
-from typing import IO, TypeVar, cast
+from typing import IO, TYPE_CHECKING, TypeVar, cast
 
-from dandischema.models import DigestType
+if TYPE_CHECKING:
+    from dandischema.models import DigestType
 
 
 @dataclass
@@ -35,6 +36,8 @@ def dandi_etag(cls, value: str) -> Digest:
         Construct a `Digest` with the given value and a ``algorithm`` of
         ``DigestType.dandi_etag``
         """
+        from dandischema.models import DigestType
+
         return cls(algorithm=DigestType.dandi_etag, value=value)
 
     @classmethod
@@ -43,6 +46,8 @@ def dandi_zarr(cls, value: str) -> Digest:
         Construct a `Digest` with the given value and a ``algorithm`` of
         ``DigestType.dandi_zarr_checksum``
         """
+        from dandischema.models import DigestType
+
         return cls(algorithm=DigestType.dandi_zarr_checksum, value=value)
 
     def asdict(self) -> dict[DigestType, str]:
@@ -57,11 +62,15 @@ def asdict(self) -> dict[DigestType, str]:
 #: not actually relevant and would be too expensive to calculate
 @cache
 def get_dummy_dandi_etag() -> Digest:
+    from dandischema.models import DigestType
+
     return Digest(algorithm=DigestType.dandi_etag, value=32 * "d" + "-1")
 
 
 @cache
 def get_dummy_dandi_zarr_checksum() -> Digest:
+    from dandischema.models import DigestType
+
     return Digest(algorithm=DigestType.dandi_zarr_checksum, value=32 * "d" + "-1--1")