492 lines
18 KiB
Python
492 lines
18 KiB
Python
import json
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import requests
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from aiohttp import ClientSession, ClientTimeout
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from pydantic import ValidationError
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from typing import Dict, Optional, List, AsyncIterator, Iterator
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from text_generation.types import (
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StreamResponse,
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Response,
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Request,
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Parameters,
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)
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from text_generation.errors import parse_error
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class Client:
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"""Client to make calls to a text-generation-inference instance
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Example:
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```python
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>>> from text_generation import Client
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>>> client = Client("https://api-inference.huggingface.co/models/bigscience/bloomz")
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>>> client.generate("Why is the sky blue?").generated_text
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' Rayleigh scattering'
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>>> result = ""
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>>> for response in client.generate_stream("Why is the sky blue?"):
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>>> if not response.token.special:
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>>> result += response.token.text
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>>> result
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' Rayleigh scattering'
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```
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"""
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def __init__(
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self,
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base_url: str,
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headers: Optional[Dict[str, str]] = None,
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cookies: Optional[Dict[str, str]] = None,
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timeout: int = 10,
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):
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"""
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Args:
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base_url (`str`):
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text-generation-inference instance base url
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headers (`Optional[Dict[str, str]]`):
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Additional headers
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cookies (`Optional[Dict[str, str]]`):
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Cookies to include in the requests
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timeout (`int`):
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Timeout in seconds
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"""
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self.base_url = base_url
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self.headers = headers
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self.cookies = cookies
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self.timeout = timeout
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def generate(
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self,
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prompt: str,
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do_sample: bool = False,
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max_new_tokens: int = 20,
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best_of: Optional[int] = None,
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repetition_penalty: Optional[float] = None,
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return_full_text: bool = False,
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seed: Optional[int] = None,
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stop_sequences: Optional[List[str]] = None,
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temperature: Optional[float] = None,
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top_k: Optional[int] = None,
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top_p: Optional[float] = None,
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truncate: Optional[int] = None,
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typical_p: Optional[float] = None,
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watermark: bool = False,
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decoder_input_details: bool = False,
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) -> Response:
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"""
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Given a prompt, generate the following text
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Args:
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prompt (`str`):
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Input text
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do_sample (`bool`):
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Activate logits sampling
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max_new_tokens (`int`):
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Maximum number of generated tokens
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best_of (`int`):
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Generate best_of sequences and return the one if the highest token logprobs
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repetition_penalty (`float`):
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The parameter for repetition penalty. 1.0 means no penalty. See [this
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paper](https://arxiv.org/pdf/1909.05858.pdf) for more details.
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return_full_text (`bool`):
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Whether to prepend the prompt to the generated text
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seed (`int`):
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Random sampling seed
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stop_sequences (`List[str]`):
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Stop generating tokens if a member of `stop_sequences` is generated
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temperature (`float`):
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The value used to module the logits distribution.
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top_k (`int`):
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The number of highest probability vocabulary tokens to keep for top-k-filtering.
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top_p (`float`):
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If set to < 1, only the smallest set of most probable tokens with probabilities that add up to `top_p` or
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higher are kept for generation.
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truncate (`int`):
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Truncate inputs tokens to the given size
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typical_p (`float`):
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Typical Decoding mass
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See [Typical Decoding for Natural Language Generation](https://arxiv.org/abs/2202.00666) for more information
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watermark (`bool`):
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Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
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decoder_input_details (`bool`):
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Return the decoder input token logprobs and ids
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Returns:
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Response: generated response
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"""
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# Validate parameters
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parameters = Parameters(
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best_of=best_of,
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details=True,
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do_sample=do_sample,
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max_new_tokens=max_new_tokens,
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repetition_penalty=repetition_penalty,
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return_full_text=return_full_text,
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seed=seed,
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stop=stop_sequences if stop_sequences is not None else [],
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temperature=temperature,
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top_k=top_k,
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top_p=top_p,
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truncate=truncate,
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typical_p=typical_p,
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watermark=watermark,
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decoder_input_details=decoder_input_details,
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)
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request = Request(inputs=prompt, stream=False, parameters=parameters)
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resp = requests.post(
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self.base_url,
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json=request.dict(),
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headers=self.headers,
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cookies=self.cookies,
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timeout=self.timeout,
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)
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payload = resp.json()
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if resp.status_code != 200:
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raise parse_error(resp.status_code, payload)
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return Response(**payload[0])
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def generate_stream(
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self,
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prompt: str,
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do_sample: bool = False,
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max_new_tokens: int = 20,
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repetition_penalty: Optional[float] = None,
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return_full_text: bool = False,
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seed: Optional[int] = None,
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stop_sequences: Optional[List[str]] = None,
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temperature: Optional[float] = None,
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top_k: Optional[int] = None,
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top_p: Optional[float] = None,
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truncate: Optional[int] = None,
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typical_p: Optional[float] = None,
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watermark: bool = False,
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) -> Iterator[StreamResponse]:
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"""
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Given a prompt, generate the following stream of tokens
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Args:
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prompt (`str`):
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Input text
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do_sample (`bool`):
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Activate logits sampling
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max_new_tokens (`int`):
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Maximum number of generated tokens
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repetition_penalty (`float`):
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The parameter for repetition penalty. 1.0 means no penalty. See [this
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paper](https://arxiv.org/pdf/1909.05858.pdf) for more details.
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return_full_text (`bool`):
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Whether to prepend the prompt to the generated text
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seed (`int`):
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Random sampling seed
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stop_sequences (`List[str]`):
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Stop generating tokens if a member of `stop_sequences` is generated
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temperature (`float`):
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The value used to module the logits distribution.
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top_k (`int`):
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The number of highest probability vocabulary tokens to keep for top-k-filtering.
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top_p (`float`):
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If set to < 1, only the smallest set of most probable tokens with probabilities that add up to `top_p` or
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higher are kept for generation.
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truncate (`int`):
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Truncate inputs tokens to the given size
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typical_p (`float`):
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Typical Decoding mass
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See [Typical Decoding for Natural Language Generation](https://arxiv.org/abs/2202.00666) for more information
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watermark (`bool`):
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Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
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Returns:
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Iterator[StreamResponse]: stream of generated tokens
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"""
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# Validate parameters
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parameters = Parameters(
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best_of=None,
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details=True,
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decoder_input_details=False,
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do_sample=do_sample,
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max_new_tokens=max_new_tokens,
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repetition_penalty=repetition_penalty,
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return_full_text=return_full_text,
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seed=seed,
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stop=stop_sequences if stop_sequences is not None else [],
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temperature=temperature,
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top_k=top_k,
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top_p=top_p,
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truncate=truncate,
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typical_p=typical_p,
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watermark=watermark,
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)
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request = Request(inputs=prompt, stream=True, parameters=parameters)
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resp = requests.post(
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self.base_url,
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json=request.dict(),
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headers=self.headers,
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cookies=self.cookies,
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timeout=self.timeout,
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stream=True,
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)
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if resp.status_code != 200:
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raise parse_error(resp.status_code, resp.json())
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# Parse ServerSentEvents
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for byte_payload in resp.iter_lines():
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# Skip line
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if byte_payload == b"\n":
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continue
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payload = byte_payload.decode("utf-8")
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# Event data
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if payload.startswith("data:"):
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# Decode payload
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json_payload = json.loads(payload.lstrip("data:").rstrip("/n"))
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# Parse payload
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try:
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response = StreamResponse(**json_payload)
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except ValidationError:
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# If we failed to parse the payload, then it is an error payload
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raise parse_error(resp.status_code, json_payload)
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yield response
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class AsyncClient:
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"""Asynchronous Client to make calls to a text-generation-inference instance
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Example:
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```python
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>>> from text_generation import AsyncClient
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>>> client = AsyncClient("https://api-inference.huggingface.co/models/bigscience/bloomz")
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>>> response = await client.generate("Why is the sky blue?")
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>>> response.generated_text
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' Rayleigh scattering'
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>>> result = ""
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>>> async for response in client.generate_stream("Why is the sky blue?"):
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>>> if not response.token.special:
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>>> result += response.token.text
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>>> result
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' Rayleigh scattering'
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```
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"""
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def __init__(
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self,
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base_url: str,
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headers: Optional[Dict[str, str]] = None,
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cookies: Optional[Dict[str, str]] = None,
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timeout: int = 10,
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):
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"""
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Args:
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base_url (`str`):
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text-generation-inference instance base url
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headers (`Optional[Dict[str, str]]`):
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Additional headers
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cookies (`Optional[Dict[str, str]]`):
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Cookies to include in the requests
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timeout (`int`):
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Timeout in seconds
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"""
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self.base_url = base_url
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self.headers = headers
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self.cookies = cookies
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self.timeout = ClientTimeout(timeout * 60)
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async def generate(
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self,
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prompt: str,
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do_sample: bool = False,
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max_new_tokens: int = 20,
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best_of: Optional[int] = None,
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repetition_penalty: Optional[float] = None,
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return_full_text: bool = False,
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seed: Optional[int] = None,
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stop_sequences: Optional[List[str]] = None,
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temperature: Optional[float] = None,
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top_k: Optional[int] = None,
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top_p: Optional[float] = None,
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truncate: Optional[int] = None,
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typical_p: Optional[float] = None,
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watermark: bool = False,
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decoder_input_details: bool = False,
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) -> Response:
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"""
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Given a prompt, generate the following text asynchronously
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Args:
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prompt (`str`):
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Input text
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do_sample (`bool`):
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Activate logits sampling
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max_new_tokens (`int`):
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|
Maximum number of generated tokens
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best_of (`int`):
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Generate best_of sequences and return the one if the highest token logprobs
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repetition_penalty (`float`):
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|
The parameter for repetition penalty. 1.0 means no penalty. See [this
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paper](https://arxiv.org/pdf/1909.05858.pdf) for more details.
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return_full_text (`bool`):
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Whether to prepend the prompt to the generated text
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seed (`int`):
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Random sampling seed
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stop_sequences (`List[str]`):
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Stop generating tokens if a member of `stop_sequences` is generated
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temperature (`float`):
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The value used to module the logits distribution.
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top_k (`int`):
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The number of highest probability vocabulary tokens to keep for top-k-filtering.
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|
top_p (`float`):
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If set to < 1, only the smallest set of most probable tokens with probabilities that add up to `top_p` or
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higher are kept for generation.
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truncate (`int`):
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Truncate inputs tokens to the given size
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typical_p (`float`):
|
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Typical Decoding mass
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|
See [Typical Decoding for Natural Language Generation](https://arxiv.org/abs/2202.00666) for more information
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watermark (`bool`):
|
|
Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
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decoder_input_details (`bool`):
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Return the decoder input token logprobs and ids
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|
Returns:
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Response: generated response
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"""
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# Validate parameters
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parameters = Parameters(
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best_of=best_of,
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details=True,
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decoder_input_details=decoder_input_details,
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do_sample=do_sample,
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max_new_tokens=max_new_tokens,
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repetition_penalty=repetition_penalty,
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return_full_text=return_full_text,
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seed=seed,
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stop=stop_sequences if stop_sequences is not None else [],
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temperature=temperature,
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top_k=top_k,
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top_p=top_p,
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truncate=truncate,
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typical_p=typical_p,
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watermark=watermark,
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)
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request = Request(inputs=prompt, stream=False, parameters=parameters)
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async with ClientSession(
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headers=self.headers, cookies=self.cookies, timeout=self.timeout
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) as session:
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async with session.post(self.base_url, json=request.dict()) as resp:
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payload = await resp.json()
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if resp.status != 200:
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raise parse_error(resp.status, payload)
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return Response(**payload[0])
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async def generate_stream(
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self,
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prompt: str,
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do_sample: bool = False,
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max_new_tokens: int = 20,
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repetition_penalty: Optional[float] = None,
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return_full_text: bool = False,
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seed: Optional[int] = None,
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stop_sequences: Optional[List[str]] = None,
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temperature: Optional[float] = None,
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top_k: Optional[int] = None,
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top_p: Optional[float] = None,
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truncate: Optional[int] = None,
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typical_p: Optional[float] = None,
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watermark: bool = False,
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) -> AsyncIterator[StreamResponse]:
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"""
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|
Given a prompt, generate the following stream of tokens asynchronously
|
|
|
|
Args:
|
|
prompt (`str`):
|
|
Input text
|
|
do_sample (`bool`):
|
|
Activate logits sampling
|
|
max_new_tokens (`int`):
|
|
Maximum number of generated tokens
|
|
repetition_penalty (`float`):
|
|
The parameter for repetition penalty. 1.0 means no penalty. See [this
|
|
paper](https://arxiv.org/pdf/1909.05858.pdf) for more details.
|
|
return_full_text (`bool`):
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|
Whether to prepend the prompt to the generated text
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|
seed (`int`):
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|
Random sampling seed
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|
stop_sequences (`List[str]`):
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|
Stop generating tokens if a member of `stop_sequences` is generated
|
|
temperature (`float`):
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|
The value used to module the logits distribution.
|
|
top_k (`int`):
|
|
The number of highest probability vocabulary tokens to keep for top-k-filtering.
|
|
top_p (`float`):
|
|
If set to < 1, only the smallest set of most probable tokens with probabilities that add up to `top_p` or
|
|
higher are kept for generation.
|
|
truncate (`int`):
|
|
Truncate inputs tokens to the given size
|
|
typical_p (`float`):
|
|
Typical Decoding mass
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|
See [Typical Decoding for Natural Language Generation](https://arxiv.org/abs/2202.00666) for more information
|
|
watermark (`bool`):
|
|
Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
|
|
|
|
Returns:
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AsyncIterator[StreamResponse]: stream of generated tokens
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"""
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# Validate parameters
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parameters = Parameters(
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best_of=None,
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details=True,
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decoder_input_details=False,
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do_sample=do_sample,
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max_new_tokens=max_new_tokens,
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|
repetition_penalty=repetition_penalty,
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|
return_full_text=return_full_text,
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seed=seed,
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stop=stop_sequences if stop_sequences is not None else [],
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temperature=temperature,
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top_k=top_k,
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top_p=top_p,
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truncate=truncate,
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typical_p=typical_p,
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watermark=watermark,
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)
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request = Request(inputs=prompt, stream=True, parameters=parameters)
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async with ClientSession(
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headers=self.headers, cookies=self.cookies, timeout=self.timeout
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) as session:
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async with session.post(self.base_url, json=request.dict()) as resp:
|
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|
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if resp.status != 200:
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raise parse_error(resp.status, await resp.json())
|
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|
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# Parse ServerSentEvents
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async for byte_payload in resp.content:
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# Skip line
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if byte_payload == b"\n":
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continue
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payload = byte_payload.decode("utf-8")
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|
|
# Event data
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|
if payload.startswith("data:"):
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# Decode payload
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|
json_payload = json.loads(payload.lstrip("data:").rstrip("/n"))
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# Parse payload
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try:
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response = StreamResponse(**json_payload)
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|
except ValidationError:
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|
# If we failed to parse the payload, then it is an error payload
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raise parse_error(resp.status, json_payload)
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yield response
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