1
0
mirror of https://github.com/tensorchord/pgvecto.rs.git synced 2025-07-29 08:21:12 +03:00

feat: add Python bindings by SQLAlchemy (#95)

* feat: init py bindings

Signed-off-by: Aurutus <emslhy@hotmail.com>

* feat: basic binding for sqlalchemy

Signed-off-by: Aurutus <emslhy@hotmail.com>

* fix: return value for decorator

Signed-off-by: Aurutus <emslhy@hotmail.com>

* test: impl basic db test order

Signed-off-by: Aurutus <emslhy@hotmail.com>

* test: add invalid value checker

Signed-off-by: Aurutus <emslhy@hotmail.com>

* test: fix insert value check

Signed-off-by: Aurutus <emslhy@hotmail.com>

* feat: impl vector operator

Signed-off-by: Aurutus <emslhy@hotmail.com>

* test: finish op tests

Signed-off-by: Aurutus <emslhy@hotmail.com>

* test: add test for creating index

Signed-off-by: Aurutus <emslhy@hotmail.com>

* docs: complete basic docs

Signed-off-by: Aurutus <emslhy@hotmail.com>

* chore: add python requirements

Signed-off-by: Aurutus <emslhy@hotmail.com>

* chore: change requirement.txt

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: change the structure of code

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: update the test

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* chore: rewrite the readme with SQLAlchemy ORM

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

chore: fix readme

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

chore: fix readme

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: rewrite tests using Alchemy ORM

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: delete serializer for binary (since it's not available for now)

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: use psycopg 3 for the SQLALchemy

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: update tests

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: comment ivf and vamana index due to #97

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* chore: format code

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: update test_invalid_insert

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* fix: rename pgvector_rs to pgvecto_rs

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: re-construct to use PDM

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* chore: fix readme and add LICENSE

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* fix: tox.ini and pyproject.toml

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: add Github Action (for example)

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

feat: fix Action

* feat: support python_check in Action

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: delete Action example

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: enhance lint check && fix

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* fix: test problem

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: try to add python_release for CI

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: Complete Python Release CI

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: try to test the package in more platform

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: try to fix test platforms

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: fix dependencies for multi-platform

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* fix: update lock file

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: fix test for macOS

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* test: delete test on macOS and Windows, since no docker img is provided

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: use workflow_dispatch to manually trigger Python Release

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* feat: enhance lint && simplify its Action

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

* chore: update readme

Signed-off-by: 盐粒 Yanli <mail@yanli.one>

---------

Signed-off-by: Aurutus <emslhy@hotmail.com>
Signed-off-by: 盐粒 Yanli <mail@yanli.one>
Co-authored-by: Aurutus <emslhy@hotmail.com>
This commit is contained in:
盐粒 Yanli
2023-10-25 15:59:57 +08:00
committed by GitHub
parent 889fac48cd
commit 21c708cfa3
16 changed files with 1402 additions and 1 deletions

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# Python bindings for pgvector.rs
[![pdm-managed](https://img.shields.io/badge/pdm-managed-blueviolet)](https://pdm.fming.dev)
Currently supports [SQLAlchemy](https://github.com/sqlalchemy/sqlalchemy).
## Usage
Install from PyPI:
```bash
pip install pgvecto_rs
```
See the usage examples:
- [SQLAlchemy](#SQLAlchemy)
### SQLAlchemy
Install [SQLAlchemy](https://github.com/sqlalchemy/sqlalchemy) and [psycopg3](https://www.psycopg.org/psycopg3/docs/basic/install.html)
```bash
pip install "psycopg[binary]" sqlalchemy
```
Then write your code. For example:
```python
import numpy as np
from sqlalchemy import create_engine, select, insert, types
from sqlalchemy import Integer, String
from pgvector_rs.sqlalchemy import Vector
from sqlalchemy.orm import Session, DeclarativeBase, mapped_column, Mapped
URL = "postgresql+psycopg://<...>"
# Define the ORM model
class Base(DeclarativeBase):
pass
class Document(Base):
__tablename__ = "documents"
id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
text: Mapped[str] = mapped_column(String)
embedding: Mapped[np.ndarray] = mapped_column(Vector(3))
def __repr__(self) -> str:
return f"{self.text}: {self.embedding}"
# Connect to the DB and create the table
engine = create_engine(URL)
Document.metadata.create_all(engine)
with Session(engine) as session:
# Insert 3 rows into the table
t1 = insert(Document).values(text="hello world", embedding=[1, 2, 3])
t2 = insert(Document).values(text="hello postgres", embedding=[1, 2, 4])
t3 = insert(Document).values(text="hello pgvecto.rs", embedding=[1, 3, 4])
for t in [t1, t2, t3]:
session.execute(t)
session.commit()
# Select the row "hello pgvecto.rs"
stmt = select(Document).where(Document.text == "hello pgvecto.rs")
target = session.scalar(stmt)
# Select all the rows and sort them
# by the squared_euclidean_distance to "hello pgvecto.rs"
stmt = select(
Document.text,
Document.embedding.squared_euclidean_distance(target.embedding).label(
"distance"
),
).order_by("distance")
for doc in session.execute(stmt):
print(doc)
# Drop the table
Document.metadata.drop_all(engine)
```
The output will be:
```
('hello pgvecto.rs', 0.0)
('hello postgres', 1.0)
('hello world', 2.0)
```
All the operators include:
- `squared_euclidean_distance`
- `negative_dot_product_distance`
- `negative_cosine_distance`
## Development
This package is managed by [PDM](https://pdm.fming.dev).
Set up things:
```bash
pdm venv create
pdm use # select the venv inside the project path
pdm sync
```
Run lint:
```bash
pdm run format
pdm run check
```
Run test in current environment:
```bash
pdm run test
```
## Test
[Tox](https://tox.wiki) is used to test the package locally.
Run test in all environment:
```bash
tox run
```

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View File

@ -0,0 +1,39 @@
[project]
name = "pgvecto_rs"
version = "0.1.0"
description = "Python binding for pgvecto.rs"
authors = [
{name = "盐粒 Yanli", email = "mail@yanli.one"},
]
dependencies = [
"numpy>=1.23",
"toml>=0.10",
]
requires-python = ">=3.8"
readme = "README.md"
license = {text = "Apache-2.0"}
[build-system]
requires = ["pdm-backend"]
build-backend = "pdm.backend"
[project.optional-dependencies]
lint = [
"black>=23.10.0",
"ruff>=0.1.1",
]
[tool.pdm.dev-dependencies]
dev = [
"SQLAlchemy>=2",
"pytest>=7.4",
"psycopg[binary]>=3.1.12",
]
[tool.pdm.scripts]
test = "pytest tests/"
format = {composite = ["black .", "ruff check --fix ."]}
check = {composite = ["black --check .", "ruff check ."]}
[tool.pytest.ini_options]
addopts = "-r aR"

View File

@ -0,0 +1,38 @@
import sqlalchemy.types as types
from ..utils import serializer
class Vector(types.UserDefinedType):
cache_ok = True
def __init__(self, dim):
if dim < 0:
raise ValueError("negative dim is not allowed")
self.dim = dim
def get_col_spec(self, **kw):
if self.dim is None or self.dim == 0:
return "VECTOR"
return "VECTOR({})".format(self.dim)
def bind_processor(self, dialect):
def _processor(value):
return serializer.to_db_str(value, self.dim)
return _processor
def result_processor(self, dialect, coltype):
def _processor(value):
return serializer.from_db_str(value)
return _processor
class comparator_factory(types.UserDefinedType.Comparator):
def squared_euclidean_distance(self, other):
return self.op("<->", return_type=types.Float)(other)
def negative_dot_product_distance(self, other):
return self.op("<#>", return_type=types.Float)(other)
def negative_cosine_distance(self, other):
return self.op("<=>", return_type=types.Float)(other)

View File

@ -0,0 +1,47 @@
import numpy as np
from functools import wraps
def ignore_none(func):
@wraps(func)
def _func(value, *args, **kwargs):
return value if value is None else func(value, *args, **kwargs)
return _func
def ignore_ndarray(func):
@wraps(func)
def _func(value, *args, **kwargs):
return value if isinstance(value, np.ndarray) else func(value, *args, **kwargs)
return _func
def validate_ndarray(func):
"""Validate ndarray data type for vector"""
@wraps(func)
def _func(value: np.ndarray, *args, **kwargs):
if isinstance(value, np.ndarray):
if value.ndim != 1:
raise ValueError("ndarray must be 1D for vector")
if not np.issubdtype(value.dtype, np.number):
raise ValueError("ndarray data type must be numeric for vector")
return func(value, *args, **kwargs)
return _func
def validate_builtin_list(func):
"""Validate list data type for vector and convert to ndarray"""
@wraps(func)
def _func(value: list, *args, **kwargs):
if isinstance(value, list):
if not all(isinstance(x, (int, float)) for x in value):
raise ValueError("list data type must be numeric for vector")
value = np.array(value, dtype=np.float32)
return func(value, *args, **kwargs)
return _func

View File

@ -0,0 +1,19 @@
from typing import Optional
import numpy as np
from . import decorators
@decorators.ignore_none
@decorators.ignore_ndarray # could be ndarray if already cast by lower-level driver
def from_db_str(value):
return np.array(value[1:-1].split(","), dtype=np.float32)
@decorators.ignore_none
@decorators.validate_builtin_list
@decorators.validate_ndarray
def to_db_str(value: np.ndarray, dim: Optional[int] = None):
if dim is not None and value.shape[0] != dim:
raise ValueError("expected %d dimensions, not %d" % (dim, len(value)))
return "[" + ",".join([str(float(v)) for v in value]) + "]"

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import os
import toml
import numpy as np
PORT = os.getenv("DB_PORT", 5432)
HOST = os.getenv("DB_HOST", "localhost")
USER = os.getenv("DB_USER", "postgres")
PASS = os.getenv("DB_PASS", "mysecretpassword")
DB_NAME = os.getenv("DB_NAME", "postgres")
# Run tests with shell:
# DB_HOST=localhost DB_USER=postgres DB_PASS=password DB_NAME=postgres python3 -m pytest bindings/python/tests/
URL = "postgresql://{username}:{password}@{host}:{port}/{db_name}".format(
port=PORT,
host=HOST,
username=USER,
password=PASS,
db_name=DB_NAME,
)
# ==== test_create_index ====
TOML_SETTINGS = {
"flat": "$${}$$".format(
toml.dumps(
{
"capacity": 2097152,
"algorithm": {"flat": {}},
}
)
),
"hnsw": "$${}$$".format(
toml.dumps(
{
"capacity": 2097152,
"algorithm": {"hnsw": {}},
}
)
),
# "ivf": "$${}$$".format(
# toml.dumps(
# {
# "capacity": 2097152,
# "algorithm": {"ivf": {}},
# }
# )
# ),
# "vamana": "$${}$$".format(
# toml.dumps(
# {
# "capacity": 2097152,
# "algorithm": {"vamana": {}},
# }
# )
# ),
}
# ==== test_invalid_insert ====
INVALID_VECTORS = [
[1, 2, 3, 4],
[
1,
],
[[1, 2], [3, 4], [5, 6]],
["123.", "123", "a"],
np.array([1, 2, 3, 4]),
np.array([1, "3", 3]),
np.zeros(shape=(1, 2)),
]
# =================================
# Semetic search tests
# =================================
VECTORS = [
[1, 2, 3],
[0.0, -45, 2.34],
np.ones(shape=(3)),
]
OP_SQRT_EUCLID_DIS = [0, 0, 0]
EXPECTED_SQRT_EUCLID_DIS = [14.0, 2030.4756, 3.0]
OP_NEG_DOT_PROD_DIS = [1, 2, 4]
EXPECTED_NEG_DOT_PROD_DIS = [-17.0, 80.64, -7.0]
OP_NEG_COS_DIS = [3, 2, 1]
EXPECTED_NEG_COS_DIS = [-0.7142857, 0.5199225, -0.92582005]
# ==== test_delete ====
LEN_AFT_DEL = 2
__all__ = [
"URL",
"TOML_SETTINGS",
"INVALID_VECTORS",
"VECTORS",
"EXPECTED_SQRT_EUCLID_DIS",
"EXPECTED_NEG_DOT_PROD_DIS",
"EXPECTED_NEG_COS_DIS",
"LEN_AFT_DEL",
]

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import pytest
import numpy as np
from tests import (
URL,
TOML_SETTINGS,
VECTORS,
INVALID_VECTORS,
OP_NEG_DOT_PROD_DIS,
EXPECTED_SQRT_EUCLID_DIS,
OP_SQRT_EUCLID_DIS,
EXPECTED_NEG_DOT_PROD_DIS,
OP_NEG_COS_DIS,
EXPECTED_NEG_COS_DIS,
LEN_AFT_DEL,
)
from sqlalchemy import create_engine, select, text, insert, delete
from sqlalchemy import Integer, Index
from pgvecto_rs.sqlalchemy import Vector
from sqlalchemy.orm import Session, DeclarativeBase, mapped_column, Mapped
from sqlalchemy.exc import StatementError
class Base(DeclarativeBase):
pass
class Document(Base):
__tablename__ = "tb_test_item"
id: Mapped[int] = mapped_column(Integer, primary_key=True)
embedding: Mapped[np.ndarray] = mapped_column(Vector(3))
def __repr__(self) -> str:
return f"{self.embedding}"
@pytest.fixture(scope="module")
def session():
"""
Connect to the test db pointed by the URL. Can check more details
in `tests/__init__.py`
"""
engine = create_engine(URL.replace("postgresql", "postgresql+psycopg"))
# ensure that we have installed pgvector.rs extension
with engine.connect() as conn:
conn.execute(text("CREATE EXTENSION IF NOT EXISTS vectors"))
conn.execute(text("DROP TABLE IF EXISTS tb_test_item"))
conn.commit()
with Session(engine) as session:
Document.metadata.create_all(engine)
try:
yield session
finally:
session.rollback()
Document.metadata.drop_all(engine)
# =================================
# Prefix functional tests
# =================================
@pytest.mark.parametrize("index_name,index_setting", TOML_SETTINGS.items())
def test_create_index(session: Session, index_name: str, index_setting: str):
index = Index(
index_name,
Document.embedding,
postgresql_using="vectors",
postgresql_with={"options": index_setting},
postgresql_ops={"embedding": "l2_ops"},
)
index.create(session.bind)
session.rollback()
@pytest.mark.parametrize("i,e", enumerate(INVALID_VECTORS))
def test_invalid_insert(session: Session, i: int, e: np.ndarray):
try:
session.execute(insert(Document).values(id=i, embedding=e))
except StatementError:
pass
else:
raise AssertionError(
"failed to raise invalid value error for {}th vector {}".format(i, e),
)
finally:
session.rollback()
# =================================
# Semetic search tests
# =================================
def test_insert(session: Session):
for stat in [
insert(Document).values(id=i, embedding=e) for i, e in enumerate(VECTORS)
]:
session.execute(stat)
session.commit()
for row in session.scalars(select(Document)):
assert np.allclose(row.embedding, VECTORS[row.id], atol=1e-10)
def test_squared_euclidean_distance(session: Session):
for row in session.execute(
select(
Document.id,
Document.embedding.squared_euclidean_distance(OP_SQRT_EUCLID_DIS),
)
):
(i, res) = row
assert np.allclose(EXPECTED_SQRT_EUCLID_DIS[i], res, atol=1e-10)
def test_negative_dot_product_distance(session: Session):
for row in session.execute(
select(
Document.id,
Document.embedding.negative_dot_product_distance(OP_NEG_DOT_PROD_DIS),
)
):
(i, res) = row
assert np.allclose(EXPECTED_NEG_DOT_PROD_DIS[i], res, atol=1e-10)
def test_negative_cosine_distance(session: Session):
for row in session.execute(
select(Document.id, Document.embedding.negative_cosine_distance(OP_NEG_COS_DIS))
):
(i, res) = row
assert np.allclose(EXPECTED_NEG_COS_DIS[i], res, atol=1e-10)
# # =================================
# # Suffix functional tests
# # =================================
def test_delete(session: Session):
session.execute(delete(Document).where(Document.embedding == VECTORS[0]))
session.commit()
res = session.execute(select(Document))
assert len(list(res)) == LEN_AFT_DEL

9
bindings/python/tox.ini Normal file
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[tox]
env_list = py3{10, 11}
[testenv]
deps = pdm
commands =
pdm sync -d -G lint
pdm run -v check
pdm run -v test