chore: import upstream snapshot with attribution

python/zvec/common/__init__.py

@@ -0,0 +1,18 @@
+# Copyright 2025-present the zvec project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from __future__ import annotations
+
+from .constants import DenseVectorType, SparseVectorType, VectorType
+
+__all__ = ["DenseVectorType", "SparseVectorType", "VectorType"]

python/zvec/common/constants.py

@@ -0,0 +1,33 @@
+# Copyright 2025-present the zvec project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from __future__ import annotations
+
+from typing import Optional, TypeVar, Union
+
+import numpy as np
+
+# VectorType: DenseVectorType | SparseVectorType
+DenseVectorType = Union[list[float], list[int], np.ndarray]
+SparseVectorType = dict[int, float]
+VectorType = Optional[Union[DenseVectorType, SparseVectorType]]
+
+# Embeddable: Text | Image | Audio
+TEXT = str
+IMAGE = Union[str, bytes, np.ndarray]  # file path, raw bytes, or numpy array
+AUDIO = Union[str, bytes, np.ndarray]  # file path, raw bytes, or numpy array
+
+Embeddable = Optional[Union[TEXT, IMAGE, AUDIO]]
+
+# Multimodal Embeddable
+MD = TypeVar("MD", bound=Embeddable, contravariant=True)