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Diffstat (limited to '.venv/lib/python3.12/site-packages/fsspec/implementations/dask.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/fsspec/implementations/dask.py | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/fsspec/implementations/dask.py b/.venv/lib/python3.12/site-packages/fsspec/implementations/dask.py new file mode 100644 index 00000000..3e127646 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/fsspec/implementations/dask.py @@ -0,0 +1,152 @@ +import dask +from distributed.client import Client, _get_global_client +from distributed.worker import Worker + +from fsspec import filesystem +from fsspec.spec import AbstractBufferedFile, AbstractFileSystem +from fsspec.utils import infer_storage_options + + +def _get_client(client): + if client is None: + return _get_global_client() + elif isinstance(client, Client): + return client + else: + # e.g., connection string + return Client(client) + + +def _in_worker(): + return bool(Worker._instances) + + +class DaskWorkerFileSystem(AbstractFileSystem): + """View files accessible to a worker as any other remote file-system + + When instances are run on the worker, uses the real filesystem. When + run on the client, they call the worker to provide information or data. + + **Warning** this implementation is experimental, and read-only for now. + """ + + def __init__( + self, target_protocol=None, target_options=None, fs=None, client=None, **kwargs + ): + super().__init__(**kwargs) + if not (fs is None) ^ (target_protocol is None): + raise ValueError( + "Please provide one of filesystem instance (fs) or" + " target_protocol, not both" + ) + self.target_protocol = target_protocol + self.target_options = target_options + self.worker = None + self.client = client + self.fs = fs + self._determine_worker() + + @staticmethod + def _get_kwargs_from_urls(path): + so = infer_storage_options(path) + if "host" in so and "port" in so: + return {"client": f"{so['host']}:{so['port']}"} + else: + return {} + + def _determine_worker(self): + if _in_worker(): + self.worker = True + if self.fs is None: + self.fs = filesystem( + self.target_protocol, **(self.target_options or {}) + ) + else: + self.worker = False + self.client = _get_client(self.client) + self.rfs = dask.delayed(self) + + def mkdir(self, *args, **kwargs): + if self.worker: + self.fs.mkdir(*args, **kwargs) + else: + self.rfs.mkdir(*args, **kwargs).compute() + + def rm(self, *args, **kwargs): + if self.worker: + self.fs.rm(*args, **kwargs) + else: + self.rfs.rm(*args, **kwargs).compute() + + def copy(self, *args, **kwargs): + if self.worker: + self.fs.copy(*args, **kwargs) + else: + self.rfs.copy(*args, **kwargs).compute() + + def mv(self, *args, **kwargs): + if self.worker: + self.fs.mv(*args, **kwargs) + else: + self.rfs.mv(*args, **kwargs).compute() + + def ls(self, *args, **kwargs): + if self.worker: + return self.fs.ls(*args, **kwargs) + else: + return self.rfs.ls(*args, **kwargs).compute() + + def _open( + self, + path, + mode="rb", + block_size=None, + autocommit=True, + cache_options=None, + **kwargs, + ): + if self.worker: + return self.fs._open( + path, + mode=mode, + block_size=block_size, + autocommit=autocommit, + cache_options=cache_options, + **kwargs, + ) + else: + return DaskFile( + fs=self, + path=path, + mode=mode, + block_size=block_size, + autocommit=autocommit, + cache_options=cache_options, + **kwargs, + ) + + def fetch_range(self, path, mode, start, end): + if self.worker: + with self._open(path, mode) as f: + f.seek(start) + return f.read(end - start) + else: + return self.rfs.fetch_range(path, mode, start, end).compute() + + +class DaskFile(AbstractBufferedFile): + def __init__(self, mode="rb", **kwargs): + if mode != "rb": + raise ValueError('Remote dask files can only be opened in "rb" mode') + super().__init__(**kwargs) + + def _upload_chunk(self, final=False): + pass + + def _initiate_upload(self): + """Create remote file/upload""" + pass + + def _fetch_range(self, start, end): + """Get the specified set of bytes from remote""" + return self.fs.fetch_range(self.path, self.mode, start, end) |