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1 changed files with 117 additions and 2394 deletions
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import inspect
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from functools import lru_cache, partial, wraps
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from typing import (
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Any,
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Callable,
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Generic,
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Iterable,
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List,
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Optional,
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Type,
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TypeVar,
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Union,
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cast,
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)
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from fastapi import APIRouter, FastAPI, status
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from pydantic import BaseModel, create_model
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from great_ai.great_ai.deploy.routes.bootstrap_dashboard import bootstrap_dashboard
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from great_ai.great_ai.views.cache_statistics import CacheStatistics
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from great_ai.utilities import parallel_map
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from ..constants import DASHBOARD_PATH
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from ..context import get_context
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from ..helper import (
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freeze_arguments,
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get_function_metadata_store,
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snake_case_to_text,
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use_http_exceptions,
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)
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from ..parameters import automatically_decorate_parameters
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from ..tracing.tracing_context import TracingContext
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from ..views import ApiMetadata, HealthCheckResponse, Trace
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from .routes import (
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bootstrap_docs_endpoints,
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bootstrap_feedback_endpoints,
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bootstrap_trace_endpoints,
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)
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T = TypeVar("T")
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class GreatAI(Generic[T]):
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def __init__(self, func: Callable[..., Any], version: str):
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func = automatically_decorate_parameters(func)
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get_function_metadata_store(func).is_finalised = True
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self._func = func
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def func_in_tracing_context(*args: Any, **kwargs: Any) -> Trace[T]:
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with TracingContext[T](func.__name__) as t:
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result = func(*args, **kwargs)
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output = t.finalise(output=result)
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return output
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self._cached_func = lru_cache(get_context().prediction_cache_size)(
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func_in_tracing_context
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) # cannot put decorator on method, because it require the context to be setup
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wraps(func)(self)
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self._version = version
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self.app = FastAPI(
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title=self.name,
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version=self.version,
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description=self.documentation
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+ f"\n\nFind out more in the [dashboard]({DASHBOARD_PATH}).",
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docs_url=None,
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redoc_url=None,
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)
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@staticmethod
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def deploy(
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func: Optional[Callable[..., T]] = None,
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*,
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version: str = "0.0.1",
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disable_rest_api: bool = False,
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disable_docs: bool = False,
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disable_dashboard: bool = False,
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) -> Union[Callable[[Callable[..., T]], "GreatAI[T]"], "GreatAI[T]"]:
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if func is None:
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return cast(
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Callable[[Callable[..., T]], GreatAI[T]],
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partial(
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GreatAI.deploy,
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disable_http=disable_rest_api,
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disable_docs=disable_docs,
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disable_dashboard=disable_dashboard,
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),
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)
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instance = GreatAI[T](func, version=version)
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if not disable_rest_api:
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instance._bootstrap_rest_api(
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disable_docs=disable_docs, disable_dashboard=disable_dashboard
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)
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return instance
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@freeze_arguments
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def __call__(self, *args: Any, **kwargs: Any) -> Trace[T]:
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return self._cached_func(*args, **kwargs)
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def process_batch(
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self,
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batch: Iterable[Any],
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concurrency: Optional[int] = None,
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) -> List[Trace[T]]:
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return parallel_map(
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freeze_arguments(self._cached_func), batch, concurrency=concurrency
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)
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@property
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def name(self) -> str:
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return snake_case_to_text(self._func.__name__)
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@property
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def version(self) -> str:
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return (
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f"{self._version}+{get_function_metadata_store(self._func).model_versions}"
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)
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@property
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def documentation(self) -> str:
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return (
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f"GreatAI wrapper for interacting with the `{self._func.__name__}` function.\n\n"
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+ (
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"\n".join(
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line.strip()
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for line in (self._func.__doc__ or "").split("\n")
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if line.strip()
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)
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)
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)
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def _bootstrap_rest_api(self, disable_docs: bool, disable_dashboard: bool) -> None:
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self._bootstrap_prediction_endpoint()
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if not disable_docs:
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bootstrap_docs_endpoints(self.app)
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if not disable_dashboard:
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bootstrap_dashboard(
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self.app,
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function_name=self._func.__name__,
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documentation=self.documentation,
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)
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bootstrap_trace_endpoints(self.app)
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bootstrap_feedback_endpoints(self.app)
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self._bootstrap_meta_endpoints()
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def _bootstrap_prediction_endpoint(self) -> None:
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router = APIRouter(
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prefix="/predict",
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tags=["predictions"],
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)
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schema = self._get_schema()
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@router.post("/", status_code=status.HTTP_200_OK, response_model=Trace[T])
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@use_http_exceptions
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def predict(input_value: schema) -> Trace[T]: # type: ignore
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return self(**cast(BaseModel, input_value).dict())
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self.app.include_router(router)
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def _get_schema(self) -> Type[BaseModel]:
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signature = inspect.signature(self._func)
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parameters = {
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p.name: (
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p.annotation if p.annotation != inspect._empty else Any,
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p.default if p.default != inspect._empty else ...,
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)
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for p in signature.parameters.values()
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if p.name in get_function_metadata_store(self._func).input_parameter_names
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}
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schema: Type[BaseModel] = create_model("InputModel", **parameters) # type: ignore
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return schema
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def _bootstrap_meta_endpoints(self) -> None:
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router = APIRouter(
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tags=["meta"],
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)
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@router.get("/health", status_code=status.HTTP_200_OK)
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def check_health() -> HealthCheckResponse:
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hits, misses, maxsize, cache_size = self._cached_func.cache_info()
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cache_statistics = CacheStatistics(
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hits=hits, misses=misses, size=cache_size, max_size=maxsize
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)
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return HealthCheckResponse(
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is_healthy=True, cache_statistics=cache_statistics
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)
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@router.get(
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"/version", response_model=ApiMetadata, status_code=status.HTTP_200_OK
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)
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def get_version() -> ApiMetadata:
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return ApiMetadata(
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name=self.name,
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version=self.version,
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documentation=self.documentation,
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configuration=get_context().to_flat_dict(),
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)
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self.app.include_router(router)
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