Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/fsspec/registry.py: 73%
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1from __future__ import annotations
3import importlib
4import types
5import warnings
7__all__ = ["registry", "get_filesystem_class", "default"]
9# internal, mutable
10_registry: dict[str, type] = {}
12# external, immutable
13registry = types.MappingProxyType(_registry)
14default = "file"
17def register_implementation(name, cls, clobber=False, errtxt=None):
18 """Add implementation class to the registry
20 Parameters
21 ----------
22 name: str
23 Protocol name to associate with the class
24 cls: class or str
25 if a class: fsspec-compliant implementation class (normally inherits from
26 ``fsspec.AbstractFileSystem``, gets added straight to the registry. If a
27 str, the full path to an implementation class like package.module.class,
28 which gets added to known_implementations,
29 so the import is deferred until the filesystem is actually used.
30 clobber: bool (optional)
31 Whether to overwrite a protocol with the same name; if False, will raise
32 instead.
33 errtxt: str (optional)
34 If given, then a failure to import the given class will result in this
35 text being given.
36 """
37 if isinstance(cls, str):
38 if name in known_implementations and clobber is False:
39 if cls != known_implementations[name]["class"]:
40 raise ValueError(
41 f"Name ({name}) already in the known_implementations and clobber "
42 f"is False"
43 )
44 else:
45 known_implementations[name] = {
46 "class": cls,
47 "err": errtxt or f"{cls} import failed for protocol {name}",
48 }
50 else:
51 if name in registry and clobber is False:
52 if _registry[name] is not cls:
53 raise ValueError(
54 f"Name ({name}) already in the registry and clobber is False"
55 )
56 else:
57 _registry[name] = cls
60# protocols mapped to the class which implements them. This dict can be
61# updated with register_implementation
62known_implementations = {
63 "abfs": {
64 "class": "adlfs.AzureBlobFileSystem",
65 "err": "Install adlfs to access Azure Datalake Gen2 and Azure Blob Storage",
66 },
67 "adl": {
68 "class": "adlfs.AzureDatalakeFileSystem",
69 "err": "Install adlfs to access Azure Datalake Gen1",
70 },
71 "arrow_hdfs": {
72 "class": "fsspec.implementations.arrow.HadoopFileSystem",
73 "err": "pyarrow and local java libraries required for HDFS",
74 },
75 "asynclocal": {
76 "class": "morefs.asyn_local.AsyncLocalFileSystem",
77 "err": "Install 'morefs[asynclocalfs]' to use AsyncLocalFileSystem",
78 },
79 "asyncwrapper": {
80 "class": "fsspec.implementations.asyn_wrapper.AsyncFileSystemWrapper",
81 },
82 "az": {
83 "class": "adlfs.AzureBlobFileSystem",
84 "err": "Install adlfs to access Azure Datalake Gen2 and Azure Blob Storage",
85 },
86 "blockcache": {"class": "fsspec.implementations.cached.CachingFileSystem"},
87 "box": {
88 "class": "boxfs.BoxFileSystem",
89 "err": "Please install boxfs to access BoxFileSystem",
90 },
91 "cached": {"class": "fsspec.implementations.cached.CachingFileSystem"},
92 "dask": {
93 "class": "fsspec.implementations.dask.DaskWorkerFileSystem",
94 "err": "Install dask distributed to access worker file system",
95 },
96 "data": {"class": "fsspec.implementations.data.DataFileSystem"},
97 "dbfs": {
98 "class": "fsspec.implementations.dbfs.DatabricksFileSystem",
99 "err": "Install the requests package to use the DatabricksFileSystem",
100 },
101 "dir": {"class": "fsspec.implementations.dirfs.DirFileSystem"},
102 "dropbox": {
103 "class": "dropboxdrivefs.DropboxDriveFileSystem",
104 "err": (
105 'DropboxFileSystem requires "dropboxdrivefs","requests" and "'
106 '"dropbox" to be installed'
107 ),
108 },
109 "dvc": {
110 "class": "dvc.api.DVCFileSystem",
111 "err": "Install dvc to access DVCFileSystem",
112 },
113 "file": {"class": "fsspec.implementations.local.LocalFileSystem"},
114 "filecache": {"class": "fsspec.implementations.cached.WholeFileCacheFileSystem"},
115 "ftp": {"class": "fsspec.implementations.ftp.FTPFileSystem"},
116 "gcs": {
117 "class": "gcsfs.GCSFileSystem",
118 "err": "Please install gcsfs to access Google Storage",
119 },
120 "gdrive": {
121 "class": "gdrive_fsspec.GoogleDriveFileSystem",
122 "err": "Please install gdrive_fs for access to Google Drive",
123 },
124 "generic": {"class": "fsspec.generic.GenericFileSystem"},
125 "gist": {
126 "class": "fsspec.implementations.gist.GistFileSystem",
127 "err": "Install the requests package to use the gist FS",
128 },
129 "git": {
130 "class": "fsspec.implementations.git.GitFileSystem",
131 "err": "Install pygit2 to browse local git repos",
132 },
133 "github": {
134 "class": "fsspec.implementations.github.GithubFileSystem",
135 "err": "Install the requests package to use the github FS",
136 },
137 "gs": {
138 "class": "gcsfs.GCSFileSystem",
139 "err": "Please install gcsfs to access Google Storage",
140 },
141 "hdfs": {
142 "class": "fsspec.implementations.arrow.HadoopFileSystem",
143 "err": "pyarrow and local java libraries required for HDFS",
144 },
145 "hf": {
146 "class": "huggingface_hub.HfFileSystem",
147 "err": "Install huggingface_hub to access HfFileSystem",
148 },
149 "http": {
150 "class": "fsspec.implementations.http.HTTPFileSystem",
151 "err": 'HTTPFileSystem requires "requests" and "aiohttp" to be installed',
152 },
153 "https": {
154 "class": "fsspec.implementations.http.HTTPFileSystem",
155 "err": 'HTTPFileSystem requires "requests" and "aiohttp" to be installed',
156 },
157 "jlab": {
158 "class": "fsspec.implementations.jupyter.JupyterFileSystem",
159 "err": "Jupyter FS requires requests to be installed",
160 },
161 "jupyter": {
162 "class": "fsspec.implementations.jupyter.JupyterFileSystem",
163 "err": "Jupyter FS requires requests to be installed",
164 },
165 "lakefs": {
166 "class": "lakefs_spec.LakeFSFileSystem",
167 "err": "Please install lakefs-spec to access LakeFSFileSystem",
168 },
169 "libarchive": {
170 "class": "fsspec.implementations.libarchive.LibArchiveFileSystem",
171 "err": "LibArchive requires to be installed",
172 },
173 "local": {"class": "fsspec.implementations.local.LocalFileSystem"},
174 "memory": {"class": "fsspec.implementations.memory.MemoryFileSystem"},
175 "oci": {
176 "class": "ocifs.OCIFileSystem",
177 "err": "Install ocifs to access OCI Object Storage",
178 },
179 "ocilake": {
180 "class": "ocifs.OCIFileSystem",
181 "err": "Install ocifs to access OCI Data Lake",
182 },
183 "oss": {
184 "class": "ossfs.OSSFileSystem",
185 "err": "Install ossfs to access Alibaba Object Storage System",
186 },
187 "pyscript": {
188 "class": "pyscript_fsspec_client.client.PyscriptFileSystem",
189 "err": "Install requests (cpython) or run in pyscript",
190 },
191 "reference": {"class": "fsspec.implementations.reference.ReferenceFileSystem"},
192 "root": {
193 "class": "fsspec_xrootd.XRootDFileSystem",
194 "err": (
195 "Install fsspec-xrootd to access xrootd storage system. "
196 "Note: 'root' is the protocol name for xrootd storage systems, "
197 "not referring to root directories"
198 ),
199 },
200 "s3": {"class": "s3fs.S3FileSystem", "err": "Install s3fs to access S3"},
201 "s3a": {"class": "s3fs.S3FileSystem", "err": "Install s3fs to access S3"},
202 "sftp": {
203 "class": "fsspec.implementations.sftp.SFTPFileSystem",
204 "err": 'SFTPFileSystem requires "paramiko" to be installed',
205 },
206 "simplecache": {"class": "fsspec.implementations.cached.SimpleCacheFileSystem"},
207 "smb": {
208 "class": "fsspec.implementations.smb.SMBFileSystem",
209 "err": 'SMB requires "smbprotocol" or "smbprotocol[kerberos]" installed',
210 },
211 "ssh": {
212 "class": "fsspec.implementations.sftp.SFTPFileSystem",
213 "err": 'SFTPFileSystem requires "paramiko" to be installed',
214 },
215 "tar": {"class": "fsspec.implementations.tar.TarFileSystem"},
216 "tosfs": {
217 "class": "tosfs.TosFileSystem",
218 "err": "Install tosfs to access ByteDance volcano engine Tinder Object Storage",
219 },
220 "wandb": {"class": "wandbfs.WandbFS", "err": "Install wandbfs to access wandb"},
221 "webdav": {
222 "class": "webdav4.fsspec.WebdavFileSystem",
223 "err": "Install webdav4 to access WebDAV",
224 },
225 "webhdfs": {
226 "class": "fsspec.implementations.webhdfs.WebHDFS",
227 "err": 'webHDFS access requires "requests" to be installed',
228 },
229 "zip": {"class": "fsspec.implementations.zip.ZipFileSystem"},
230}
232assert list(known_implementations) == sorted(known_implementations), (
233 "Not in alphabetical order"
234)
237def get_filesystem_class(protocol):
238 """Fetch named protocol implementation from the registry
240 The dict ``known_implementations`` maps protocol names to the locations
241 of classes implementing the corresponding file-system. When used for the
242 first time, appropriate imports will happen and the class will be placed in
243 the registry. All subsequent calls will fetch directly from the registry.
245 Some protocol implementations require additional dependencies, and so the
246 import may fail. In this case, the string in the "err" field of the
247 ``known_implementations`` will be given as the error message.
248 """
249 if not protocol:
250 protocol = default
252 if protocol not in registry:
253 if protocol not in known_implementations:
254 raise ValueError(f"Protocol not known: {protocol}")
255 bit = known_implementations[protocol]
256 try:
257 register_implementation(protocol, _import_class(bit["class"]))
258 except ImportError as e:
259 raise ImportError(bit.get("err")) from e
260 cls = registry[protocol]
261 if getattr(cls, "protocol", None) in ("abstract", None):
262 cls.protocol = protocol
264 return cls
267s3_msg = """Your installed version of s3fs is very old and known to cause
268severe performance issues, see also https://github.com/dask/dask/issues/10276
270To fix, you should specify a lower version bound on s3fs, or
271update the current installation.
272"""
275def _import_class(fqp: str):
276 """Take a fully-qualified path and return the imported class or identifier.
278 ``fqp`` is of the form "package.module.klass" or
279 "package.module:subobject.klass".
281 Warnings
282 --------
283 This can import arbitrary modules. Make sure you haven't installed any modules
284 that may execute malicious code at import time.
285 """
286 if ":" in fqp:
287 mod, name = fqp.rsplit(":", 1)
288 else:
289 mod, name = fqp.rsplit(".", 1)
291 is_s3 = mod == "s3fs"
292 mod = importlib.import_module(mod)
293 if is_s3 and mod.__version__.split(".") < ["0", "5"]:
294 warnings.warn(s3_msg)
295 for part in name.split("."):
296 mod = getattr(mod, part)
298 if not isinstance(mod, type):
299 raise TypeError(f"{fqp} is not a class")
301 return mod
304def filesystem(protocol, **storage_options):
305 """Instantiate filesystems for given protocol and arguments
307 ``storage_options`` are specific to the protocol being chosen, and are
308 passed directly to the class.
309 """
310 if protocol == "arrow_hdfs":
311 warnings.warn(
312 "The 'arrow_hdfs' protocol has been deprecated and will be "
313 "removed in the future. Specify it as 'hdfs'.",
314 DeprecationWarning,
315 )
317 cls = get_filesystem_class(protocol)
318 return cls(**storage_options)
321def available_protocols():
322 """Return a list of the implemented protocols.
324 Note that any given protocol may require extra packages to be importable.
325 """
326 return list(known_implementations)