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backend.py
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backend.py
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import os
import subprocess
import time
from dataclasses import dataclass
from types import TracebackType
from typing import TYPE_CHECKING, Any, Dict, Iterator, List, Optional, Tuple
from eliot import start_action, to_file
if TYPE_CHECKING:
import manifest
class Backend:
@property
def description(self) -> str:
return ""
def run(self, request: str) -> str:
raise NotImplementedError
def run_stream(self, request: str) -> Iterator[str]:
yield self.run(request)
async def arun(self, request: str) -> str:
return self.run(request)
def _block_input(self, gr): # type: ignore
return gr.Textbox(show_label=False)
def _block_output(self, gr): # type: ignore
return gr.Textbox(show_label=False)
class Id(Backend):
def run(self, request: str) -> str:
return request
class Mock(Backend):
def __init__(self, answers: List[str] = []):
self.i = -1
self.answers = answers
def run(self, request: str) -> str:
self.i += 1
return self.answers[self.i % len(self.answers)]
def run_stream(self, request: str) -> Iterator[str]:
self.i += 1
result = self.answers[self.i % len(self.answers)]
for c in result:
yield c
time.sleep(0.1)
def __repr__(self) -> str:
return f"Mocked Backend {self.answers}"
class Google(Backend):
def __init__(self) -> None:
pass
def run(self, request: str) -> str:
from serpapi import GoogleSearch
serpapi_key = os.environ.get("SERP_KEY")
assert (
serpapi_key
), "Need a SERP_KEY. Get one here https://serpapi.com/users/welcome"
self.serpapi_key = serpapi_key
params = {
"api_key": self.serpapi_key,
"engine": "google",
"q": request,
"google_domain": "google.com",
"gl": "us",
"hl": "en",
}
search = GoogleSearch(params)
res = search.get_dict()
if "answer_box" in res.keys() and "answer" in res["answer_box"].keys():
toret = res["answer_box"]["answer"]
elif "answer_box" in res.keys() and "snippet" in res["answer_box"].keys():
toret = res["answer_box"]["snippet"]
elif (
"answer_box" in res.keys()
and "snippet_highlighted_words" in res["answer_box"].keys()
):
toret = res["answer_box"]["snippet_highlighted_words"][0]
elif "snippet" in res["organic_results"][0].keys():
toret = res["organic_results"][0]["snippet"]
else:
toret = ""
return str(toret)
def __repr__(self) -> str:
return "Google Search Backend"
class Python(Backend):
"""Executes Python commands and returns the output."""
def _block_input(self, gr): # type: ignore
return gr.Code()
def _block_output(self, gr): # type: ignore
return gr.Code()
def run(self, request: str) -> str:
"""Run commands and return final output."""
from contextlib import redirect_stdout
from io import StringIO
p = request.strip()
if p.startswith("```"):
p = "\n".join(p.strip().split("\n")[1:-1])
f = StringIO()
with redirect_stdout(f):
exec(p)
s = f.getvalue()
return s
def __repr__(self) -> str:
return "Python-Backend"
class Bash(Backend):
"""Executes bash commands and returns the output."""
def _block_input(self, gr): # type: ignore
return gr.Code()
def _block_output(self, gr): # type: ignore
return gr.Code()
def __init__(self, strip_newlines: bool = False, return_err_output: bool = False):
"""Initialize with stripping newlines."""
self.strip_newlines = strip_newlines
self.return_err_output = return_err_output
def run(self, request: str) -> str:
"""Run commands and return final output."""
try:
output = subprocess.run(
request,
shell=True,
check=True,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
).stdout.decode()
except subprocess.CalledProcessError as error:
if self.return_err_output:
return str(error.stdout.decode())
return str(error)
if self.strip_newlines:
output = output.strip()
return output
def __repr__(self) -> str:
return "Bash-Backend"
class OpenAIBase(Backend):
def __init__(
self,
model: str = "gpt-3.5-turbo",
max_tokens: int = 256,
temperature: float = 0.0,
stop: Optional[List[str]] = None,
) -> None:
self.model = model
self.stop = stop
self.options = dict(
model=model,
max_tokens=max_tokens,
temperature=temperature,
)
def __repr__(self) -> str:
return f"OpenAI Backend {self.options}"
class OpenAI(OpenAIBase):
def run(self, request: str) -> str:
import manifest
chat = {"gpt-4", "gpt-3.5-turbo"}
manifest = manifest.Manifest(
client_name="openaichat" if self.model in chat else "openai",
max_tokens=self.options["max_tokens"],
cache_name="sqlite",
cache_connection=f"{MinichainContext.name}",
)
ans = manifest.run(
request,
stop_sequences=self.stop,
)
return str(ans)
def run_stream(self, prompt: str) -> Iterator[str]:
import openai
self.api_key = os.environ.get("OPENAI_API_KEY")
assert (
self.api_key
), "Need an OPENAI_API_KEY. Get one here https://openai.com/api/"
openai.api_key = self.api_key
for chunk in openai.ChatCompletion.create(
model=self.model,
messages=[{"role": "user", "content": prompt}],
stream=True,
stop=self.stop,
):
content = chunk["choices"][0].get("delta", {}).get("content")
if content is not None:
yield content
class OpenAIEmbed(OpenAIBase):
def _block_output(self, gr): # type: ignore
return gr.Textbox(label="Embedding")
def __init__(self, model: str = "text-embedding-ada-002", **kwargs: Any) -> None:
super().__init__(model, **kwargs)
def run(self, request: str) -> str:
import openai
self.api_key = os.environ.get("OPENAI_API_KEY")
assert (
self.api_key
), "Need an OPENAI_API_KEY. Get one here https://openai.com/api/"
openai.api_key = self.api_key
ans = openai.Embedding.create(
engine=self.model,
input=request,
)
return ans["data"][0]["embedding"] # type: ignore
class HuggingFaceBase(Backend):
def __init__(self, model: str = "gpt2") -> None:
self.model = model
class HuggingFace(HuggingFaceBase):
def run(self, request: str) -> str:
from huggingface_hub.inference_api import InferenceApi
self.api_key = os.environ.get("HF_KEY")
assert self.api_key, "Need an HF_KEY. Get one here https://huggingface.co/"
self.client = InferenceApi(
token=self.api_key, repo_id=self.model, task="text-generation"
)
response = self.client(inputs=request)
return response # type: ignore
class HuggingFaceEmbed(HuggingFaceBase):
def run(self, request: str) -> str:
from huggingface_hub.inference_api import InferenceApi
self.api_key = os.environ.get("HF_KEY")
assert self.api_key, "Need an HF_KEY. Get one here https://huggingface.co/"
self.client = InferenceApi(
token=self.api_key, repo_id=self.model, task="feature-extraction"
)
response = self.client(inputs=request)
return response # type: ignore
class Manifest(Backend):
def __init__(self, client: "manifest.Manifest") -> None:
"Client from [Manifest-ML](https://github.com/HazyResearch/manifest)."
self.client = client
def run(self, request: str) -> str:
try:
import manifest
except ImportError:
raise ImportError("`pip install manifest-ml` to use the Manifest Backend.")
assert isinstance(
self.client, manifest.Manifest
), "Client must be a `manifest.Manifest` instance."
return self.client.run(request) # type: ignore
@dataclass
class RunLog:
request: str = ""
response: Optional[str] = ""
output: str = ""
dynamic: int = 0
@dataclass
class PromptSnap:
input_: Any = ""
run_log: RunLog = RunLog()
output: Any = ""
class MinichainContext:
id_: int = 0
prompt_store: Dict[Tuple[int, int], List[PromptSnap]] = {}
prompt_count: Dict[int, int] = {}
name: str = ""
def set_minichain_log(name: str) -> None:
to_file(open(f"{name}.log", "w"))
class MiniChain:
"""
MiniChain session object with backends. Make backend by calling
`minichain.OpenAI()` with args for `OpenAI` class.
"""
def __init__(self, name: str):
to_file(open(f"{name}.log", "w"))
self.name = name
def __enter__(self) -> "MiniChain":
MinichainContext.prompt_store = {}
MinichainContext.prompt_count = {}
MinichainContext.name = self.name
self.action = start_action(action_type=self.name)
return self
def __exit__(
self,
type: type,
exception: Optional[BaseException],
traceback: Optional[TracebackType],
) -> None:
self.action.finish()
self.prompt_store = dict(MinichainContext.prompt_store)
MinichainContext.prompt_store = {}
MinichainContext.prompt_count = {}
MinichainContext.name = ""
def start_chain(name: str) -> MiniChain:
"""
Initialize a chain. Logs to {name}.log. Returns a `MiniChain` that
holds LLM backends..
"""
return MiniChain(name)
# def show_log(filename: str, o: Callable[[str], Any] = sys.stderr.write) -> None:
# """
# Write out the full asynchronous log from file `filename`.
# """
# render_tasks(
# o,
# tasks_from_iterable([json.loads(line) for line in open(filename)]),
# colorize=True,
# human_readable=True,
# )