Adaptor pattern in Python

storage.py

# storage/adaptor.py

class StorageAdaptor:

    def save(self, *, path: str) -> None:
        raise NotImplementedError

    def delete(self, *, path: str) -> None:
        raise NotImplementedError


# storage/adaptors/{local,s3}.py

class StorageAdaptorLocal(StorageAdaptor):

    def __init__(self, *, storage_dir: str) -> None:
        self.storage_dir = storage_dir

    def save(self, path: str) -> None:
        print("saves to local filesystem")

    def delete(self, path: str) -> None:
        print("deletes file from local filesystem")


class StorageAdaptorS3(StorageAdaptor):

    def __init__(self, *, access_key: str, secret_access_key: str, bucket: str) -> None:
        self.access_key = access_key
        self.secret_access_key = secret_access_key
        self.bucket = bucket

    def save(self, path: str) -> None:
        print("saves to S3")

    def delete(self, path: str) -> None:
        print("deletes file from  S3")


# storage.py

class Storage:
    def __init__(self, *, adaptor: StorageAdaptor) -> None:
        self.adaptor = adaptor

    def save(self, path: str) -> None:
        self.adaptor.save(path=path)

    def delete(self, path: str) -> None:
        self.adaptor.delete(path=path)

In [1]: store = Storage(adaptor=StorageAdaptorLocal(storage_dir="/uploads"))                                                                                                                                                                   

In [2]: store.save(path="file.py")                                                                                                                                                                                                          
saves to local filesystem

In [3]: store = Storage(adaptor=StorageAdaptorS3(access_key="x", secret_access_key="x", bucket="x"))                                                                                                                                        

In [4]: store.save(path="file.py")                                                                                                                                                                                                          
saves to S3