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"""Abstract interface for file storage implementations."""
from abc import ABC, abstractmethod
from collections.abc import Generator
class BaseStorage(ABC):
"""Interface for file storage."""
def __init__(self): # noqa: B027
pass
@abstractmethod
def save(self, filename, data):
raise NotImplementedError
@abstractmethod
def load_once(self, filename: str) -> bytes:
raise NotImplementedError
@abstractmethod
def load_stream(self, filename: str) -> Generator:
raise NotImplementedError
@abstractmethod
def download(self, filename, target_filepath):
raise NotImplementedError
@abstractmethod
def exists(self, filename):
raise NotImplementedError
@abstractmethod
def delete(self, filename):
raise NotImplementedError
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