Source code for langchain_community.llms.openai

from __future__ import annotations

import logging
import os
import sys
import warnings
from typing import (
    AbstractSet,
    Any,
    AsyncIterator,
    Callable,
    Collection,
    Dict,
    Iterator,
    List,
    Literal,
    Mapping,
    Optional,
    Set,
    Tuple,
    Union,
)

from langchain_core._api.deprecation import deprecated
from langchain_core.callbacks import (
    AsyncCallbackManagerForLLMRun,
    CallbackManagerForLLMRun,
)
from langchain_core.language_models.llms import BaseLLM, create_base_retry_decorator
from langchain_core.outputs import Generation, GenerationChunk, LLMResult
from langchain_core.pydantic_v1 import Field, root_validator
from langchain_core.utils import get_from_dict_or_env, get_pydantic_field_names
from langchain_core.utils.utils import build_extra_kwargs

from langchain_community.utils.openai import is_openai_v1

logger = logging.getLogger(__name__)


[docs]def update_token_usage( keys: Set[str], response: Dict[str, Any], token_usage: Dict[str, Any] ) -> None: """Update token usage.""" _keys_to_use = keys.intersection(response["usage"]) for _key in _keys_to_use: if _key not in token_usage: token_usage[_key] = response["usage"][_key] else: token_usage[_key] += response["usage"][_key]
def _stream_response_to_generation_chunk( stream_response: Dict[str, Any], ) -> GenerationChunk: """Convert a stream response to a generation chunk.""" if not stream_response["choices"]: return GenerationChunk(text="") return GenerationChunk( text=stream_response["choices"][0]["text"], generation_info=dict( finish_reason=stream_response["choices"][0].get("finish_reason", None), logprobs=stream_response["choices"][0].get("logprobs", None), ), ) def _update_response(response: Dict[str, Any], stream_response: Dict[str, Any]) -> None: """Update response from the stream response.""" response["choices"][0]["text"] += stream_response["choices"][0]["text"] response["choices"][0]["finish_reason"] = stream_response["choices"][0].get( "finish_reason", None ) response["choices"][0]["logprobs"] = stream_response["choices"][0]["logprobs"] def _streaming_response_template() -> Dict[str, Any]: return { "choices": [ { "text": "", "finish_reason": None, "logprobs": None, } ] } def _create_retry_decorator( llm: Union[BaseOpenAI, OpenAIChat], run_manager: Optional[ Union[AsyncCallbackManagerForLLMRun, CallbackManagerForLLMRun] ] = None, ) -> Callable[[Any], Any]: import openai errors = [ openai.error.Timeout, openai.error.APIError, openai.error.APIConnectionError, openai.error.RateLimitError, openai.error.ServiceUnavailableError, ] return create_base_retry_decorator( error_types=errors, max_retries=llm.max_retries, run_manager=run_manager )
[docs]def completion_with_retry( llm: Union[BaseOpenAI, OpenAIChat], run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any, ) -> Any: """Use tenacity to retry the completion call.""" if is_openai_v1(): return llm.client.create(**kwargs) retry_decorator = _create_retry_decorator(llm, run_manager=run_manager) @retry_decorator def _completion_with_retry(**kwargs: Any) -> Any: return llm.client.create(**kwargs) return _completion_with_retry(**kwargs)
[docs]async def acompletion_with_retry( llm: Union[BaseOpenAI, OpenAIChat], run_manager: Optional[AsyncCallbackManagerForLLMRun] = None, **kwargs: Any, ) -> Any: """Use tenacity to retry the async completion call.""" if is_openai_v1(): return await llm.async_client.create(**kwargs) retry_decorator = _create_retry_decorator(llm, run_manager=run_manager) @retry_decorator async def _completion_with_retry(**kwargs: Any) -> Any: # Use OpenAI's async api https://github.com/openai/openai-python#async-api return await llm.client.acreate(**kwargs) return await _completion_with_retry(**kwargs)
[docs]class BaseOpenAI(BaseLLM): """Base OpenAI large language model class.""" @property def lc_secrets(self) -> Dict[str, str]: return {"openai_api_key": "OPENAI_API_KEY"}
[docs] @classmethod def get_lc_namespace(cls) -> List[str]: """Get the namespace of the langchain object.""" return ["langchain", "llms", "openai"]
@property def lc_attributes(self) -> Dict[str, Any]: attributes: Dict[str, Any] = {} if self.openai_api_base: attributes["openai_api_base"] = self.openai_api_base if self.openai_organization: attributes["openai_organization"] = self.openai_organization if self.openai_proxy: attributes["openai_proxy"] = self.openai_proxy return attributes
[docs] @classmethod def is_lc_serializable(cls) -> bool: return True
client: Any = Field(default=None, exclude=True) #: :meta private: async_client: Any = Field(default=None, exclude=True) #: :meta private: model_name: str = Field(default="gpt-3.5-turbo-instruct", alias="model") """Model name to use.""" temperature: float = 0.7 """What sampling temperature to use.""" max_tokens: int = 256 """The maximum number of tokens to generate in the completion. -1 returns as many tokens as possible given the prompt and the models maximal context size.""" top_p: float = 1 """Total probability mass of tokens to consider at each step.""" frequency_penalty: float = 0 """Penalizes repeated tokens according to frequency.""" presence_penalty: float = 0 """Penalizes repeated tokens.""" n: int = 1 """How many completions to generate for each prompt.""" best_of: int = 1 """Generates best_of completions server-side and returns the "best".""" model_kwargs: Dict[str, Any] = Field(default_factory=dict) """Holds any model parameters valid for `create` call not explicitly specified.""" # When updating this to use a SecretStr # Check for classes that derive from this class (as some of them # may assume openai_api_key is a str) openai_api_key: Optional[str] = Field(default=None, alias="api_key") """Automatically inferred from env var `OPENAI_API_KEY` if not provided.""" openai_api_base: Optional[str] = Field(default=None, alias="base_url") """Base URL path for API requests, leave blank if not using a proxy or service emulator.""" openai_organization: Optional[str] = Field(default=None, alias="organization") """Automatically inferred from env var `OPENAI_ORG_ID` if not provided.""" # to support explicit proxy for OpenAI openai_proxy: Optional[str] = None batch_size: int = 20 """Batch size to use when passing multiple documents to generate.""" request_timeout: Union[float, Tuple[float, float], Any, None] = Field( default=None, alias="timeout" ) """Timeout for requests to OpenAI completion API. Can be float, httpx.Timeout or None.""" logit_bias: Optional[Dict[str, float]] = Field(default_factory=dict) """Adjust the probability of specific tokens being generated.""" max_retries: int = 2 """Maximum number of retries to make when generating.""" streaming: bool = False """Whether to stream the results or not.""" allowed_special: Union[Literal["all"], AbstractSet[str]] = set() """Set of special tokens that are allowed。""" disallowed_special: Union[Literal["all"], Collection[str]] = "all" """Set of special tokens that are not allowed。""" tiktoken_model_name: Optional[str] = None """The model name to pass to tiktoken when using this class. Tiktoken is used to count the number of tokens in documents to constrain them to be under a certain limit. By default, when set to None, this will be the same as the embedding model name. However, there are some cases where you may want to use this Embedding class with a model name not supported by tiktoken. This can include when using Azure embeddings or when using one of the many model providers that expose an OpenAI-like API but with different models. In those cases, in order to avoid erroring when tiktoken is called, you can specify a model name to use here.""" default_headers: Union[Mapping[str, str], None] = None default_query: Union[Mapping[str, object], None] = None # Configure a custom httpx client. See the # [httpx documentation](https://www.python-httpx.org/api/#client) for more details. http_client: Union[Any, None] = None """Optional httpx.Client.""" def __new__(cls, **data: Any) -> Union[OpenAIChat, BaseOpenAI]: # type: ignore """Initialize the OpenAI object.""" model_name = data.get("model_name", "") if ( model_name.startswith("gpt-3.5-turbo") or model_name.startswith("gpt-4") ) and "-instruct" not in model_name: warnings.warn( "You are trying to use a chat model. This way of initializing it is " "no longer supported. Instead, please use: " "`from langchain_community.chat_models import ChatOpenAI`" ) return OpenAIChat(**data) return super().__new__(cls) class Config: """Configuration for this pydantic object.""" allow_population_by_field_name = True @root_validator(pre=True) def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]: """Build extra kwargs from additional params that were passed in.""" all_required_field_names = get_pydantic_field_names(cls) extra = values.get("model_kwargs", {}) values["model_kwargs"] = build_extra_kwargs( extra, values, all_required_field_names ) return values @root_validator() def validate_environment(cls, values: Dict) -> Dict: """Validate that api key and python package exists in environment.""" if values["n"] < 1: raise ValueError("n must be at least 1.") if values["streaming"] and values["n"] > 1: raise ValueError("Cannot stream results when n > 1.") if values["streaming"] and values["best_of"] > 1: raise ValueError("Cannot stream results when best_of > 1.") values["openai_api_key"] = get_from_dict_or_env( values, "openai_api_key", "OPENAI_API_KEY" ) values["openai_api_base"] = values["openai_api_base"] or os.getenv( "OPENAI_API_BASE" ) values["openai_proxy"] = get_from_dict_or_env( values, "openai_proxy", "OPENAI_PROXY", default="", ) values["openai_organization"] = ( values["openai_organization"] or os.getenv("OPENAI_ORG_ID") or os.getenv("OPENAI_ORGANIZATION") ) try: import openai except ImportError: raise ImportError( "Could not import openai python package. " "Please install it with `pip install openai`." ) if is_openai_v1(): client_params = { "api_key": values["openai_api_key"], "organization": values["openai_organization"], "base_url": values["openai_api_base"], "timeout": values["request_timeout"], "max_retries": values["max_retries"], "default_headers": values["default_headers"], "default_query": values["default_query"], "http_client": values["http_client"], } if not values.get("client"): values["client"] = openai.OpenAI(**client_params).completions if not values.get("async_client"): values["async_client"] = openai.AsyncOpenAI(**client_params).completions elif not values.get("client"): values["client"] = openai.Completion else: pass return values @property def _default_params(self) -> Dict[str, Any]: """Get the default parameters for calling OpenAI API.""" normal_params: Dict[str, Any] = { "temperature": self.temperature, "top_p": self.top_p, "frequency_penalty": self.frequency_penalty, "presence_penalty": self.presence_penalty, "n": self.n, "logit_bias": self.logit_bias, } if self.max_tokens is not None: normal_params["max_tokens"] = self.max_tokens if self.request_timeout is not None and not is_openai_v1(): normal_params["request_timeout"] = self.request_timeout # Azure gpt-35-turbo doesn't support best_of # don't specify best_of if it is 1 if self.best_of > 1: normal_params["best_of"] = self.best_of return {**normal_params, **self.model_kwargs} def _stream( self, prompt: str, stop: Optional[List[str]] = None, run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any, ) -> Iterator[GenerationChunk]: params = {**self._invocation_params, **kwargs, "stream": True} self.get_sub_prompts(params, [prompt], stop) # this mutates params for stream_resp in completion_with_retry( self, prompt=prompt, run_manager=run_manager, **params ): if not isinstance(stream_resp, dict): stream_resp = stream_resp.dict() chunk = _stream_response_to_generation_chunk(stream_resp) if run_manager: run_manager.on_llm_new_token( chunk.text, chunk=chunk, verbose=self.verbose, logprobs=chunk.generation_info["logprobs"] if chunk.generation_info else None, ) yield chunk async def _astream( self, prompt: str, stop: Optional[List[str]] = None, run_manager: Optional[AsyncCallbackManagerForLLMRun] = None, **kwargs: Any, ) -> AsyncIterator[GenerationChunk]: params = {**self._invocation_params, **kwargs, "stream": True} self.get_sub_prompts(params, [prompt], stop) # this mutates params async for stream_resp in await acompletion_with_retry( self, prompt=prompt, run_manager=run_manager, **params ): if not isinstance(stream_resp, dict): stream_resp = stream_resp.dict() chunk = _stream_response_to_generation_chunk(stream_resp) if run_manager: await run_manager.on_llm_new_token( chunk.text, chunk=chunk, verbose=self.verbose, logprobs=chunk.generation_info["logprobs"] if chunk.generation_info else None, ) yield chunk def _generate( self, prompts: List[str], stop: Optional[List[str]] = None, run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any, ) -> LLMResult: """Call out to OpenAI's endpoint with k unique prompts. Args: prompts: The prompts to pass into the model. stop: Optional list of stop words to use when generating. Returns: The full LLM output. Example: .. code-block:: python response = openai.generate(["Tell me a joke."]) """ # TODO: write a unit test for this params = self._invocation_params params = {**params, **kwargs} sub_prompts = self.get_sub_prompts(params, prompts, stop) choices = [] token_usage: Dict[str, int] = {} # Get the token usage from the response. # Includes prompt, completion, and total tokens used. _keys = {"completion_tokens", "prompt_tokens", "total_tokens"} system_fingerprint: Optional[str] = None for _prompts in sub_prompts: if self.streaming: if len(_prompts) > 1: raise ValueError("Cannot stream results with multiple prompts.") generation: Optional[GenerationChunk] = None for chunk in self._stream(_prompts[0], stop, run_manager, **kwargs): if generation is None: generation = chunk else: generation += chunk assert generation is not None choices.append( { "text": generation.text, "finish_reason": generation.generation_info.get("finish_reason") if generation.generation_info else None, "logprobs": generation.generation_info.get("logprobs") if generation.generation_info else None, } ) else: response = completion_with_retry( self, prompt=_prompts, run_manager=run_manager, **params ) if not isinstance(response, dict): # V1 client returns the response in an PyDantic object instead of # dict. For the transition period, we deep convert it to dict. response = response.dict() choices.extend(response["choices"]) update_token_usage(_keys, response, token_usage) if not system_fingerprint: system_fingerprint = response.get("system_fingerprint") return self.create_llm_result( choices, prompts, params, token_usage, system_fingerprint=system_fingerprint, ) async def _agenerate( self, prompts: List[str], stop: Optional[List[str]] = None, run_manager: Optional[AsyncCallbackManagerForLLMRun] = None, **kwargs: Any, ) -> LLMResult: """Call out to OpenAI's endpoint async with k unique prompts.""" params = self._invocation_params params = {**params, **kwargs} sub_prompts = self.get_sub_prompts(params, prompts, stop) choices = [] token_usage: Dict[str, int] = {} # Get the token usage from the response. # Includes prompt, completion, and total tokens used. _keys = {"completion_tokens", "prompt_tokens", "total_tokens"} system_fingerprint: Optional[str] = None for _prompts in sub_prompts: if self.streaming: if len(_prompts) > 1: raise ValueError("Cannot stream results with multiple prompts.") generation: Optional[GenerationChunk] = None async for chunk in self._astream( _prompts[0], stop, run_manager, **kwargs ): if generation is None: generation = chunk else: generation += chunk assert generation is not None choices.append( { "text": generation.text, "finish_reason": generation.generation_info.get("finish_reason") if generation.generation_info else None, "logprobs": generation.generation_info.get("logprobs") if generation.generation_info else None, } ) else: response = await acompletion_with_retry( self, prompt=_prompts, run_manager=run_manager, **params ) if not isinstance(response, dict): response = response.dict() choices.extend(response["choices"]) update_token_usage(_keys, response, token_usage) return self.create_llm_result( choices, prompts, params, token_usage, system_fingerprint=system_fingerprint, )
[docs] def get_sub_prompts( self, params: Dict[str, Any], prompts: List[str], stop: Optional[List[str]] = None, ) -> List[List[str]]: """Get the sub prompts for llm call.""" if stop is not None: if "stop" in params: raise ValueError("`stop` found in both the input and default params.") params["stop"] = stop if params["max_tokens"] == -1: if len(prompts) != 1: raise ValueError( "max_tokens set to -1 not supported for multiple inputs." ) params["max_tokens"] = self.max_tokens_for_prompt(prompts[0]) sub_prompts = [ prompts[i : i + self.batch_size] for i in range(0, len(prompts), self.batch_size) ] return sub_prompts
[docs] def create_llm_result( self, choices: Any, prompts: List[str], params: Dict[str, Any], token_usage: Dict[str, int], *, system_fingerprint: Optional[str] = None, ) -> LLMResult: """Create the LLMResult from the choices and prompts.""" generations = [] n = params.get("n", self.n) for i, _ in enumerate(prompts): sub_choices = choices[i * n : (i + 1) * n] generations.append( [ Generation( text=choice["text"], generation_info=dict( finish_reason=choice.get("finish_reason"), logprobs=choice.get("logprobs"), ), ) for choice in sub_choices ] ) llm_output = {"token_usage": token_usage, "model_name": self.model_name} if system_fingerprint: llm_output["system_fingerprint"] = system_fingerprint return LLMResult(generations=generations, llm_output=llm_output)
@property def _invocation_params(self) -> Dict[str, Any]: """Get the parameters used to invoke the model.""" openai_creds: Dict[str, Any] = {} if not is_openai_v1(): openai_creds.update( { "api_key": self.openai_api_key, "api_base": self.openai_api_base, "organization": self.openai_organization, } ) if self.openai_proxy: import openai openai.proxy = {"http": self.openai_proxy, "https": self.openai_proxy} # type: ignore[assignment] return {**openai_creds, **self._default_params} @property def _identifying_params(self) -> Mapping[str, Any]: """Get the identifying parameters.""" return {**{"model_name": self.model_name}, **self._default_params} @property def _llm_type(self) -> str: """Return type of llm.""" return "openai"
[docs] def get_token_ids(self, text: str) -> List[int]: """Get the token IDs using the tiktoken package.""" # tiktoken NOT supported for Python < 3.8 if sys.version_info[1] < 8: return super().get_num_tokens(text) try: import tiktoken except ImportError: raise ImportError( "Could not import tiktoken python package. " "This is needed in order to calculate get_num_tokens. " "Please install it with `pip install tiktoken`." ) model_name = self.tiktoken_model_name or self.model_name try: enc = tiktoken.encoding_for_model(model_name) except KeyError: logger.warning("Warning: model not found. Using cl100k_base encoding.") model = "cl100k_base" enc = tiktoken.get_encoding(model) return enc.encode( text, allowed_special=self.allowed_special, disallowed_special=self.disallowed_special, )
[docs] @staticmethod def modelname_to_contextsize(modelname: str) -> int: """Calculate the maximum number of tokens possible to generate for a model. Args: modelname: The modelname we want to know the context size for. Returns: The maximum context size Example: .. code-block:: python max_tokens = openai.modelname_to_contextsize("gpt-3.5-turbo-instruct") """ model_token_mapping = { "gpt-4o": 128_000, "gpt-4o-2024-05-13": 128_000, "gpt-4": 8192, "gpt-4-0314": 8192, "gpt-4-0613": 8192, "gpt-4-32k": 32768, "gpt-4-32k-0314": 32768, "gpt-4-32k-0613": 32768, "gpt-3.5-turbo": 4096, "gpt-3.5-turbo-0301": 4096, "gpt-3.5-turbo-0613": 4096, "gpt-3.5-turbo-16k": 16385, "gpt-3.5-turbo-16k-0613": 16385, "gpt-3.5-turbo-instruct": 4096, "text-ada-001": 2049, "ada": 2049, "text-babbage-001": 2040, "babbage": 2049, "text-curie-001": 2049, "curie": 2049, "davinci": 2049, "text-davinci-003": 4097, "text-davinci-002": 4097, "code-davinci-002": 8001, "code-davinci-001": 8001, "code-cushman-002": 2048, "code-cushman-001": 2048, } # handling finetuned models if "ft-" in modelname: modelname = modelname.split(":")[0] context_size = model_token_mapping.get(modelname, None) if context_size is None: raise ValueError( f"Unknown model: {modelname}. Please provide a valid OpenAI model name." "Known models are: " + ", ".join(model_token_mapping.keys()) ) return context_size
@property def max_context_size(self) -> int: """Get max context size for this model.""" return self.modelname_to_contextsize(self.model_name)
[docs] def max_tokens_for_prompt(self, prompt: str) -> int: """Calculate the maximum number of tokens possible to generate for a prompt. Args: prompt: The prompt to pass into the model. Returns: The maximum number of tokens to generate for a prompt. Example: .. code-block:: python max_tokens = openai.max_token_for_prompt("Tell me a joke.") """ num_tokens = self.get_num_tokens(prompt) return self.max_context_size - num_tokens
[docs]@deprecated( since="0.0.10", removal="0.3.0", alternative_import="langchain_openai.OpenAI" ) class OpenAI(BaseOpenAI): """OpenAI large language models. To use, you should have the ``openai`` python package installed, and the environment variable ``OPENAI_API_KEY`` set with your API key. Any parameters that are valid to be passed to the openai.create call can be passed in, even if not explicitly saved on this class. Example: .. code-block:: python from langchain_community.llms import OpenAI openai = OpenAI(model_name="gpt-3.5-turbo-instruct") """
[docs] @classmethod def get_lc_namespace(cls) -> List[str]: """Get the namespace of the langchain object.""" return ["langchain", "llms", "openai"]
@property def _invocation_params(self) -> Dict[str, Any]: return {**{"model": self.model_name}, **super()._invocation_params}
[docs]@deprecated( since="0.0.10", removal="0.3.0", alternative_import="langchain_openai.AzureOpenAI" ) class AzureOpenAI(BaseOpenAI): """Azure-specific OpenAI large language models. To use, you should have the ``openai`` python package installed, and the environment variable ``OPENAI_API_KEY`` set with your API key. Any parameters that are valid to be passed to the openai.create call can be passed in, even if not explicitly saved on this class. Example: .. code-block:: python from langchain_community.llms import AzureOpenAI openai = AzureOpenAI(model_name="gpt-3.5-turbo-instruct") """ azure_endpoint: Union[str, None] = None """Your Azure endpoint, including the resource. Automatically inferred from env var `AZURE_OPENAI_ENDPOINT` if not provided. Example: `https://example-resource.azure.openai.com/` """ deployment_name: Union[str, None] = Field(default=None, alias="azure_deployment") """A model deployment. If given sets the base client URL to include `/deployments/{azure_deployment}`. Note: this means you won't be able to use non-deployment endpoints. """ openai_api_version: str = Field(default="", alias="api_version") """Automatically inferred from env var `OPENAI_API_VERSION` if not provided.""" openai_api_key: Union[str, None] = Field(default=None, alias="api_key") """Automatically inferred from env var `AZURE_OPENAI_API_KEY` if not provided.""" azure_ad_token: Union[str, None] = None """Your Azure Active Directory token. Automatically inferred from env var `AZURE_OPENAI_AD_TOKEN` if not provided. For more: https://www.microsoft.com/en-us/security/business/identity-access/microsoft-entra-id. """ azure_ad_token_provider: Union[Callable[[], str], None] = None """A function that returns an Azure Active Directory token. Will be invoked on every request. """ openai_api_type: str = "" """Legacy, for openai<1.0.0 support.""" validate_base_url: bool = True """For backwards compatibility. If legacy val openai_api_base is passed in, try to infer if it is a base_url or azure_endpoint and update accordingly. """
[docs] @classmethod def get_lc_namespace(cls) -> List[str]: """Get the namespace of the langchain object.""" return ["langchain", "llms", "openai"]
@root_validator() def validate_environment(cls, values: Dict) -> Dict: """Validate that api key and python package exists in environment.""" if values["n"] < 1: raise ValueError("n must be at least 1.") if values["streaming"] and values["n"] > 1: raise ValueError("Cannot stream results when n > 1.") if values["streaming"] and values["best_of"] > 1: raise ValueError("Cannot stream results when best_of > 1.") # Check OPENAI_KEY for backwards compatibility. # TODO: Remove OPENAI_API_KEY support to avoid possible conflict when using # other forms of azure credentials. values["openai_api_key"] = ( values["openai_api_key"] or os.getenv("AZURE_OPENAI_API_KEY") or os.getenv("OPENAI_API_KEY") ) values["azure_endpoint"] = values["azure_endpoint"] or os.getenv( "AZURE_OPENAI_ENDPOINT" ) values["azure_ad_token"] = values["azure_ad_token"] or os.getenv( "AZURE_OPENAI_AD_TOKEN" ) values["openai_api_base"] = values["openai_api_base"] or os.getenv( "OPENAI_API_BASE" ) values["openai_proxy"] = get_from_dict_or_env( values, "openai_proxy", "OPENAI_PROXY", default="", ) values["openai_organization"] = ( values["openai_organization"] or os.getenv("OPENAI_ORG_ID") or os.getenv("OPENAI_ORGANIZATION") ) values["openai_api_version"] = values["openai_api_version"] or os.getenv( "OPENAI_API_VERSION" ) values["openai_api_type"] = get_from_dict_or_env( values, "openai_api_type", "OPENAI_API_TYPE", default="azure" ) try: import openai except ImportError: raise ImportError( "Could not import openai python package. " "Please install it with `pip install openai`." ) if is_openai_v1(): # For backwards compatibility. Before openai v1, no distinction was made # between azure_endpoint and base_url (openai_api_base). openai_api_base = values["openai_api_base"] if openai_api_base and values["validate_base_url"]: if "/openai" not in openai_api_base: values["openai_api_base"] = ( values["openai_api_base"].rstrip("/") + "/openai" ) warnings.warn( "As of openai>=1.0.0, Azure endpoints should be specified via " f"the `azure_endpoint` param not `openai_api_base` " f"(or alias `base_url`). Updating `openai_api_base` from " f"{openai_api_base} to {values['openai_api_base']}." ) if values["deployment_name"]: warnings.warn( "As of openai>=1.0.0, if `deployment_name` (or alias " "`azure_deployment`) is specified then " "`openai_api_base` (or alias `base_url`) should not be. " "Instead use `deployment_name` (or alias `azure_deployment`) " "and `azure_endpoint`." ) if values["deployment_name"] not in values["openai_api_base"]: warnings.warn( "As of openai>=1.0.0, if `openai_api_base` " "(or alias `base_url`) is specified it is expected to be " "of the form " "https://example-resource.azure.openai.com/openai/deployments/example-deployment. " # noqa: E501 f"Updating {openai_api_base} to " f"{values['openai_api_base']}." ) values["openai_api_base"] += ( "/deployments/" + values["deployment_name"] ) values["deployment_name"] = None client_params = { "api_version": values["openai_api_version"], "azure_endpoint": values["azure_endpoint"], "azure_deployment": values["deployment_name"], "api_key": values["openai_api_key"], "azure_ad_token": values["azure_ad_token"], "azure_ad_token_provider": values["azure_ad_token_provider"], "organization": values["openai_organization"], "base_url": values["openai_api_base"], "timeout": values["request_timeout"], "max_retries": values["max_retries"], "default_headers": values["default_headers"], "default_query": values["default_query"], "http_client": values["http_client"], } values["client"] = openai.AzureOpenAI(**client_params).completions values["async_client"] = openai.AsyncAzureOpenAI( **client_params ).completions else: values["client"] = openai.Completion return values @property def _identifying_params(self) -> Mapping[str, Any]: return { **{"deployment_name": self.deployment_name}, **super()._identifying_params, } @property def _invocation_params(self) -> Dict[str, Any]: if is_openai_v1(): openai_params = {"model": self.deployment_name} else: openai_params = { "engine": self.deployment_name, "api_type": self.openai_api_type, "api_version": self.openai_api_version, } return {**openai_params, **super()._invocation_params} @property def _llm_type(self) -> str: """Return type of llm.""" return "azure" @property def lc_attributes(self) -> Dict[str, Any]: return { "openai_api_type": self.openai_api_type, "openai_api_version": self.openai_api_version, }
[docs]@deprecated( since="0.0.1", removal="0.3.0", alternative_import="langchain_openai.ChatOpenAI", ) class OpenAIChat(BaseLLM): """OpenAI Chat large language models. To use, you should have the ``openai`` python package installed, and the environment variable ``OPENAI_API_KEY`` set with your API key. Any parameters that are valid to be passed to the openai.create call can be passed in, even if not explicitly saved on this class. Example: .. code-block:: python from langchain_community.llms import OpenAIChat openaichat = OpenAIChat(model_name="gpt-3.5-turbo") """ client: Any = Field(default=None, exclude=True) #: :meta private: async_client: Any = Field(default=None, exclude=True) #: :meta private: model_name: str = "gpt-3.5-turbo" """Model name to use.""" model_kwargs: Dict[str, Any] = Field(default_factory=dict) """Holds any model parameters valid for `create` call not explicitly specified.""" # When updating this to use a SecretStr # Check for classes that derive from this class (as some of them # may assume openai_api_key is a str) openai_api_key: Optional[str] = Field(default=None, alias="api_key") """Automatically inferred from env var `OPENAI_API_KEY` if not provided.""" openai_api_base: Optional[str] = Field(default=None, alias="base_url") """Base URL path for API requests, leave blank if not using a proxy or service emulator.""" # to support explicit proxy for OpenAI openai_proxy: Optional[str] = None max_retries: int = 6 """Maximum number of retries to make when generating.""" prefix_messages: List = Field(default_factory=list) """Series of messages for Chat input.""" streaming: bool = False """Whether to stream the results or not.""" allowed_special: Union[Literal["all"], AbstractSet[str]] = set() """Set of special tokens that are allowed。""" disallowed_special: Union[Literal["all"], Collection[str]] = "all" """Set of special tokens that are not allowed。""" @root_validator(pre=True) def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]: """Build extra kwargs from additional params that were passed in.""" all_required_field_names = {field.alias for field in cls.__fields__.values()} extra = values.get("model_kwargs", {}) for field_name in list(values): if field_name not in all_required_field_names: if field_name in extra: raise ValueError(f"Found {field_name} supplied twice.") extra[field_name] = values.pop(field_name) values["model_kwargs"] = extra return values @root_validator() def validate_environment(cls, values: Dict) -> Dict: """Validate that api key and python package exists in environment.""" openai_api_key = get_from_dict_or_env( values, "openai_api_key", "OPENAI_API_KEY" ) openai_api_base = get_from_dict_or_env( values, "openai_api_base", "OPENAI_API_BASE", default="", ) openai_proxy = get_from_dict_or_env( values, "openai_proxy", "OPENAI_PROXY", default="", ) openai_organization = get_from_dict_or_env( values, "openai_organization", "OPENAI_ORGANIZATION", default="" ) try: import openai openai.api_key = openai_api_key if openai_api_base: openai.api_base = openai_api_base if openai_organization: openai.organization = openai_organization if openai_proxy: openai.proxy = {"http": openai_proxy, "https": openai_proxy} # type: ignore[assignment] except ImportError: raise ImportError( "Could not import openai python package. " "Please install it with `pip install openai`." ) try: values["client"] = openai.ChatCompletion except AttributeError: raise ValueError( "`openai` has no `ChatCompletion` attribute, this is likely " "due to an old version of the openai package. Try upgrading it " "with `pip install --upgrade openai`." ) warnings.warn( "You are trying to use a chat model. This way of initializing it is " "no longer supported. Instead, please use: " "`from langchain_community.chat_models import ChatOpenAI`" ) return values @property def _default_params(self) -> Dict[str, Any]: """Get the default parameters for calling OpenAI API.""" return self.model_kwargs def _get_chat_params( self, prompts: List[str], stop: Optional[List[str]] = None ) -> Tuple: if len(prompts) > 1: raise ValueError( f"OpenAIChat currently only supports single prompt, got {prompts}" ) messages = self.prefix_messages + [{"role": "user", "content": prompts[0]}] params: Dict[str, Any] = {**{"model": self.model_name}, **self._default_params} if stop is not None: if "stop" in params: raise ValueError("`stop` found in both the input and default params.") params["stop"] = stop if params.get("max_tokens") == -1: # for ChatGPT api, omitting max_tokens is equivalent to having no limit del params["max_tokens"] return messages, params def _stream( self, prompt: str, stop: Optional[List[str]] = None, run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any, ) -> Iterator[GenerationChunk]: messages, params = self._get_chat_params([prompt], stop) params = {**params, **kwargs, "stream": True} for stream_resp in completion_with_retry( self, messages=messages, run_manager=run_manager, **params ): if not isinstance(stream_resp, dict): stream_resp = stream_resp.dict() token = stream_resp["choices"][0]["delta"].get("content", "") chunk = GenerationChunk(text=token) if run_manager: run_manager.on_llm_new_token(token, chunk=chunk) yield chunk async def _astream( self, prompt: str, stop: Optional[List[str]] = None, run_manager: Optional[AsyncCallbackManagerForLLMRun] = None, **kwargs: Any, ) -> AsyncIterator[GenerationChunk]: messages, params = self._get_chat_params([prompt], stop) params = {**params, **kwargs, "stream": True} async for stream_resp in await acompletion_with_retry( self, messages=messages, run_manager=run_manager, **params ): if not isinstance(stream_resp, dict): stream_resp = stream_resp.dict() token = stream_resp["choices"][0]["delta"].get("content", "") chunk = GenerationChunk(text=token) if run_manager: await run_manager.on_llm_new_token(token, chunk=chunk) yield chunk def _generate( self, prompts: List[str], stop: Optional[List[str]] = None, run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any, ) -> LLMResult: if self.streaming: generation: Optional[GenerationChunk] = None for chunk in self._stream(prompts[0], stop, run_manager, **kwargs): if generation is None: generation = chunk else: generation += chunk assert generation is not None return LLMResult(generations=[[generation]]) messages, params = self._get_chat_params(prompts, stop) params = {**params, **kwargs} full_response = completion_with_retry( self, messages=messages, run_manager=run_manager, **params ) if not isinstance(full_response, dict): full_response = full_response.dict() llm_output = { "token_usage": full_response["usage"], "model_name": self.model_name, } return LLMResult( generations=[ [Generation(text=full_response["choices"][0]["message"]["content"])] ], llm_output=llm_output, ) async def _agenerate( self, prompts: List[str], stop: Optional[List[str]] = None, run_manager: Optional[AsyncCallbackManagerForLLMRun] = None, **kwargs: Any, ) -> LLMResult: if self.streaming: generation: Optional[GenerationChunk] = None async for chunk in self._astream(prompts[0], stop, run_manager, **kwargs): if generation is None: generation = chunk else: generation += chunk assert generation is not None return LLMResult(generations=[[generation]]) messages, params = self._get_chat_params(prompts, stop) params = {**params, **kwargs} full_response = await acompletion_with_retry( self, messages=messages, run_manager=run_manager, **params ) if not isinstance(full_response, dict): full_response = full_response.dict() llm_output = { "token_usage": full_response["usage"], "model_name": self.model_name, } return LLMResult( generations=[ [Generation(text=full_response["choices"][0]["message"]["content"])] ], llm_output=llm_output, ) @property def _identifying_params(self) -> Mapping[str, Any]: """Get the identifying parameters.""" return {**{"model_name": self.model_name}, **self._default_params} @property def _llm_type(self) -> str: """Return type of llm.""" return "openai-chat"
[docs] def get_token_ids(self, text: str) -> List[int]: """Get the token IDs using the tiktoken package.""" # tiktoken NOT supported for Python < 3.8 if sys.version_info[1] < 8: return super().get_token_ids(text) try: import tiktoken except ImportError: raise ImportError( "Could not import tiktoken python package. " "This is needed in order to calculate get_num_tokens. " "Please install it with `pip install tiktoken`." ) enc = tiktoken.encoding_for_model(self.model_name) return enc.encode( text, allowed_special=self.allowed_special, disallowed_special=self.disallowed_special, )