Try pydantic v1 API explicitly

pydantic v2 is not compatible with daf_butler at the moment.
Change all the imports to first try to load the v1 API explicitly
before falling back to the default API. pydantic.v1 works with
v2.

python/lsst/daf/butler/_quantum_backed.py

@@ -32,7 +32,11 @@
 
 from deprecated.sphinx import deprecated
 from lsst.resources import ResourcePathExpression
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from ._butlerConfig import ButlerConfig
 from ._deferredDatasetHandle import DeferredDatasetHandle

python/lsst/daf/butler/core/datasets/ref.py

@@ -36,7 +36,11 @@
 from typing import TYPE_CHECKING, Any, ClassVar
 
 from lsst.utils.classes import immutable
-from pydantic import BaseModel, StrictStr, validator
+
+try:
+    from pydantic.v1 import BaseModel, StrictStr, validator
+except ModuleNotFoundError:
+    from pydantic import BaseModel, StrictStr, validator
 
 from ..configSupport import LookupKey
 from ..dimensions import DataCoordinate, DimensionGraph, DimensionUniverse, SerializedDataCoordinate

python/lsst/daf/butler/core/datasets/type.py

@@ -29,7 +29,10 @@
 from types import MappingProxyType
 from typing import TYPE_CHECKING, Any, ClassVar
 
-from pydantic import BaseModel, StrictBool, StrictStr
+try:
+    from pydantic.v1 import BaseModel, StrictBool, StrictStr
+except ModuleNotFoundError:
+    from pydantic import BaseModel, StrictBool, StrictStr
 
 from ..configSupport import LookupKey
 from ..dimensions import DimensionGraph, SerializedDimensionGraph

python/lsst/daf/butler/core/datastoreCacheManager.py

@@ -46,7 +46,11 @@
 from typing import TYPE_CHECKING
 
 from lsst.resources import ResourcePath
-from pydantic import BaseModel, PrivateAttr
+
+try:
+    from pydantic.v1 import BaseModel, PrivateAttr
+except ModuleNotFoundError:
+    from pydantic import BaseModel, PrivateAttr
 
 from .config import ConfigSubset
 from .configSupport import processLookupConfigs

python/lsst/daf/butler/core/datastoreRecordData.py

@@ -32,7 +32,11 @@
 
 from lsst.utils import doImportType
 from lsst.utils.introspection import get_full_type_name
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from .datasets import DatasetId
 from .dimensions import DimensionUniverse

python/lsst/daf/butler/core/dimensions/_coordinate.py

@@ -35,7 +35,11 @@
 
 from deprecated.sphinx import deprecated
 from lsst.sphgeom import IntersectionRegion, Region
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from ..json import from_json_pydantic, to_json_pydantic
 from ..named import NamedKeyDict, NamedKeyMapping, NamedValueAbstractSet, NameLookupMapping

python/lsst/daf/butler/core/dimensions/_graph.py

@@ -29,7 +29,11 @@
 from typing import TYPE_CHECKING, Any, ClassVar
 
 from lsst.utils.classes import cached_getter, immutable
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from .._topology import TopologicalFamily, TopologicalSpace
 from ..json import from_json_pydantic, to_json_pydantic

python/lsst/daf/butler/core/dimensions/_records.py

@@ -27,7 +27,11 @@
 
 import lsst.sphgeom
 from lsst.utils.classes import immutable
-from pydantic import BaseModel, Field, StrictBool, StrictFloat, StrictInt, StrictStr, create_model
+
+try:
+    from pydantic.v1 import BaseModel, Field, StrictBool, StrictFloat, StrictInt, StrictStr, create_model
+except ModuleNotFoundError:
+    from pydantic import BaseModel, Field, StrictBool, StrictFloat, StrictInt, StrictStr, create_model
 
 from ..json import from_json_pydantic, to_json_pydantic
 from ..persistenceContext import PersistenceContextVars

python/lsst/daf/butler/core/logging.py

@@ -31,7 +31,11 @@
 
 from lsst.utils.introspection import get_full_type_name
 from lsst.utils.iteration import isplit
-from pydantic import BaseModel, PrivateAttr
+
+try:
+    from pydantic.v1 import BaseModel, PrivateAttr
+except ModuleNotFoundError:
+    from pydantic import BaseModel, PrivateAttr
 
 _LONG_LOG_FORMAT = "{levelname} {asctime} {name} {filename}:{lineno} - {message}"
 """Default format for log records."""

python/lsst/daf/butler/core/quantum.py

@@ -30,7 +30,11 @@
 
 from lsst.utils import doImportType
 from lsst.utils.introspection import find_outside_stacklevel
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from .datasets import DatasetRef, DatasetType, SerializedDatasetRef, SerializedDatasetType
 from .datastoreRecordData import DatastoreRecordData, SerializedDatastoreRecordData

python/lsst/daf/butler/core/serverModels.py

@@ -34,7 +34,11 @@
 from typing import Any, ClassVar
 
 from lsst.utils.iteration import ensure_iterable
-from pydantic import BaseModel, Field, validator
+
+try:
+    from pydantic.v1 import BaseModel, Field, validator
+except ModuleNotFoundError:
+    from pydantic import BaseModel, Field, validator
 
 from .dimensions import DataIdValue, SerializedDataCoordinate
 from .utils import globToRegex

python/lsst/daf/butler/registry/obscore/_config.py

@@ -35,7 +35,10 @@
 from collections.abc import Mapping
 from typing import Any
 
-from pydantic import BaseModel, StrictBool, StrictFloat, StrictInt, StrictStr, validator
+try:
+    from pydantic.v1 import BaseModel, StrictBool, StrictFloat, StrictInt, StrictStr, validator
+except ModuleNotFoundError:
+    from pydantic import BaseModel, StrictBool, StrictFloat, StrictInt, StrictStr, validator
 
 
 class ExtraColumnType(str, enum.Enum):

python/lsst/daf/butler/registry/wildcards.py

@@ -35,7 +35,11 @@
 
 from deprecated.sphinx import deprecated
 from lsst.utils.iteration import ensure_iterable
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 from ..core import DatasetType
 from ..core.utils import globToRegex

python/lsst/daf/butler/tests/_examplePythonTypes.py

@@ -43,7 +43,11 @@
 from typing import TYPE_CHECKING, Any
 
 from lsst.daf.butler import StorageClass, StorageClassDelegate
-from pydantic import BaseModel
+
+try:
+    from pydantic.v1 import BaseModel
+except ModuleNotFoundError:
+    from pydantic import BaseModel
 
 if TYPE_CHECKING:
     from lsst.daf.butler import Butler, Datastore, FormatterFactory

python/lsst/daf/butler/tests/dict_convertible_model.py

@@ -25,7 +25,10 @@
 
 from collections.abc import Mapping
 
-from pydantic import BaseModel, Field
+try:
+    from pydantic.v1 import BaseModel, Field
+except ModuleNotFoundError:
+    from pydantic import BaseModel, Field
 
 
 class DictConvertibleModel(BaseModel):