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182 | class JinaEmbedding(BaseEmbedding):
"""JinaAI类用于嵌入。
Args:
model（str）：用于嵌入的模型。
默认为`jina-embeddings-v2-base-en`"""
api_key: str = Field(default=None, description="The JinaAI API key.")
model: str = Field(
default="jina-embeddings-v2-base-en",
description="The model to use when calling Jina AI API",
)
_session: Any = PrivateAttr()
_encoding_queries: str = PrivateAttr()
_encoding_documents: str = PrivateAttr()
def __init__(
self,
model: str = "jina-embeddings-v2-base-en",
embed_batch_size: int = DEFAULT_EMBED_BATCH_SIZE,
api_key: Optional[str] = None,
callback_manager: Optional[CallbackManager] = None,
encoding_queries: Optional[str] = None,
encoding_documents: Optional[str] = None,
**kwargs: Any,
) -> None:
super().__init__(
embed_batch_size=embed_batch_size,
callback_manager=callback_manager,
model=model,
api_key=api_key,
**kwargs,
)
self._encoding_queries = encoding_queries or "float"
self._encoding_documents = encoding_documents or "float"
assert (
self._encoding_documents in VALID_ENCODING
), f"Encoding Documents parameter {self._encoding_documents} not supported. Please choose one of {VALID_ENCODING}"
assert (
self._encoding_queries in VALID_ENCODING
), f"Encoding Queries parameter {self._encoding_documents} not supported. Please choose one of {VALID_ENCODING}"
self.api_key = get_from_param_or_env("api_key", api_key, "JINAAI_API_KEY", "")
self.model = model
self._session = requests.Session()
self._session.headers.update(
{"Authorization": f"Bearer {api_key}", "Accept-Encoding": "identity"}
)
@classmethod
def class_name(cls) -> str:
return "JinaAIEmbedding"
def _get_query_embedding(self, query: str) -> List[float]:
"""获取查询嵌入。"""
return self._get_embeddings([query], encoding_type=self._encoding_queries)[0]
async def _aget_query_embedding(self, query: str) -> List[float]:
"""_get_query_embedding的异步版本。"""
result = await self._aget_embeddings(
[query], encoding_type=self._encoding_queries
)
return result[0]
def _get_text_embedding(self, text: str) -> List[float]:
"""获取文本嵌入。"""
return self._get_text_embeddings([text])[0]
async def _aget_text_embedding(self, text: str) -> List[float]:
"""异步获取文本嵌入。"""
result = await self._aget_text_embeddings([text])
return result[0]
def _get_text_embeddings(self, texts: List[str]) -> List[List[float]]:
return self._get_embeddings(texts=texts, encoding_type=self._encoding_documents)
async def _aget_text_embeddings(
self,
texts: List[str],
) -> List[List[float]]:
return await self._aget_embeddings(
texts=texts, encoding_type=self._encoding_documents
)
def _get_embeddings(
self, texts: List[str], encoding_type: str = "float"
) -> List[List[float]]:
"""获取嵌入。"""
# Call Jina AI Embedding API
resp = self._session.post( # type: ignore
API_URL,
json={"input": texts, "model": self.model, "encoding_type": encoding_type},
).json()
if "data" not in resp:
raise RuntimeError(resp["detail"])
embeddings = resp["data"]
# Sort resulting embeddings by index
sorted_embeddings = sorted(embeddings, key=lambda e: e["index"]) # type: ignore
# Return just the embeddings
if encoding_type == "ubinary":
return [
np.unpackbits(np.array(result["embedding"], dtype="uint8")).tolist()
for result in sorted_embeddings
]
elif encoding_type == "binary":
return [
np.unpackbits(
(np.array(result["embedding"]) + 128).astype("uint8")
).tolist()
for result in sorted_embeddings
]
return [result["embedding"] for result in sorted_embeddings]
async def _aget_embeddings(
self, texts: List[str], encoding_type: str = "float"
) -> List[List[float]]:
"""异步获取文本嵌入。"""
import aiohttp
async with aiohttp.ClientSession(trust_env=True) as session:
headers = {
"Authorization": f"Bearer {self.api_key}",
"Accept-Encoding": "identity",
}
async with session.post(
f"{API_URL}",
json={
"input": texts,
"model": self.model,
"encoding_type": encoding_type,
},
headers=headers,
) as response:
resp = await response.json()
response.raise_for_status()
embeddings = resp["data"]
# Sort resulting embeddings by index
sorted_embeddings = sorted(embeddings, key=lambda e: e["index"]) # type: ignore
# Return just the embeddings
if encoding_type == "ubinary":
return [
np.unpackbits(
np.array(result["embedding"], dtype="uint8")
).tolist()
for result in sorted_embeddings
]
elif encoding_type == "binary":
return [
np.unpackbits(
(np.array(result["embedding"]) + 128).astype("uint8")
).tolist()
for result in sorted_embeddings
]
return [result["embedding"] for result in sorted_embeddings]
|