ocifs classes
OCIFileSystem
- class ocifs.core.OCIFileSystem(*args, **kwargs)
Bases:
AbstractFileSystem
Access oci as if it were a file system.
This exposes a filesystem-like API (ls, cp, open, etc.) on top of oci object storage.
- Parameters
config (Union[dict, str, None]) – Config for the connection to OCI. If a dict, it should be returned from oci.config.from_file If a str, it should be the location of the config file If None, user should have a Resource Principal configured environment If Resource Principal is not available, Instance Principal
signer (oci.auth.signer) – A signer from the OCI sdk. More info: oci.auth.signers
profile (str) – The profile to use from the config (If the config is passed in)
iam_type (str (None)) – The IAM Auth principal type to use. Values can be one of [“api_key”, “resource_principal”, “instance_principal”]
region (str (None)) – The Region Identifier that the client should connnect to. Regions can be found here: https://docs.oracle.com/en-us/iaas/Content/General/Concepts/regions.htm
default_block_size (int (None)) – If given, the default block size value used for
open()
, if no specific value is given at all time. The built-in default is 5MB.config_kwargs (dict) – dict of parameters passed to the OCI Client upon connection more info here: oci.object_storage.ObjectStorageClient.__init__
oci_additional_kwargs (dict) – dict of parameters that are used when calling oci api methods. Typically used for things like “retry_strategy”.
kwargs (dict) – dict of other parameters for oci session This includes default parameters for tenancy, namespace, and region Any other parameters are passed along to AbstractFileSystem’s init method.
- async_impl = False
- blocksize = 4194304
- bulk_delete(pathlist, **kwargs)
Remove multiple keys with one call :param pathlist: The keys to remove, must all be in the same bucket. :type pathlist: listof strings
- cachable = True
- cat(path, recursive=False, on_error='raise', **kwargs)
Fetch (potentially multiple) paths’ contents
- Parameters
recursive (bool) – If True, assume the path(s) are directories, and get all the contained files
on_error ("raise", "omit", "return") – If raise, an underlying exception will be raised (converted to KeyError if the type is in self.missing_exceptions); if omit, keys with exception will simply not be included in the output; if “return”, all keys are included in the output, but the value will be bytes or an exception instance.
kwargs (passed to cat_file) –
- Returns
dict of {path (contents} if there are multiple paths)
or the path has been otherwise expanded
- cat_file(path, start=None, end=None, **kwargs)
Get the content of a file
- Parameters
path (URL of file on this filesystems) –
end (start,) – Bytes limits of the read. If negative, backwards from end, like usual python slices. Either can be None for start or end of file, respectively
kwargs (passed to
open()
.) –
- cat_ranges(paths, starts, ends, max_gap=None, **kwargs)
- checksum(path, **kwargs)
Unique value for current version of file
If the checksum is the same from one moment to another, the contents are guaranteed to be the same. If the checksum changes, the contents might have changed.
- Parameters
path (string/bytes) – path of file to get checksum for
refresh (bool (=False)) – if False, look in local cache for file details first
- classmethod clear_instance_cache()
Clear the cache of filesystem instances.
Notes
Unless overridden by setting the
cachable
class attribute to False, the filesystem class stores a reference to newly created instances. This prevents Python’s normal rules around garbage collection from working, since the instances refcount will not drop to zero untilclear_instance_cache
is called.
- connect(refresh=True)
Establish oci connection object.
- Parameters
refresh (bool) – Whether to create new session/client, even if a previous one with the same parameters already exists. If False (default), an existing one will be used if possible.
- connect_timeout = 5
- copy(path1, path2, destination_region=None, **kwargs)
Copy file between locations on OCI
- Parameters
path1 (str) – URI of source data
path2 (str) – URI of destination data
destination_region (str) – the region you want path2 to be written in (defaults region of your config)
- copy_basic(path1, path2, destination_region=None, **kwargs)
Copy file between locations on OCI
Not allowed where the origin is >50GB
- Parameters
path1 (str) – URI of source data
path2 (str) – URI of destination data
destination_region (str) – the region you want path2 to be written in (defaults region of your config)
- cp(path1, path2, **kwargs)
Alias of AbstractFileSystem.copy.
- cp_file(path1, path2, **kwargs)
- created(path)
Return the created timestamp of a file as a datetime.datetime
- classmethod current()
Return the most recently instantiated FileSystem
If no instance has been created, then create one with defaults
- default_block_size = 5242880
- delete(path, recursive=False, maxdepth=None)
Alias of AbstractFileSystem.rm.
- disk_usage(path, total=True, maxdepth=None, **kwargs)
Alias of AbstractFileSystem.du.
- download(rpath, lpath, recursive=False, **kwargs)
Alias of AbstractFileSystem.get.
- du(path, total=True, maxdepth=None, **kwargs)
Space used by files within a path
- Parameters
path (str) –
total (bool) – whether to sum all the file sizes
maxdepth (int or None) – maximum number of directory levels to descend, None for unlimited.
kwargs (passed to
ls
) –
- Returns
Dict of {fn (size} if total=False, or int otherwise, where numbers)
refer to bytes used.
- end_transaction()
Finish write transaction, non-context version
- exists(path, **kwargs)
Is there a file at the given path
- expand_path(path, recursive=False, maxdepth=None)
Turn one or more globs or directories into a list of all matching paths to files or directories.
- find(path, maxdepth=None, withdirs=False, detail=False, **kwargs)
List all files below path.
Like posix
find
command without conditions- Parameters
path (str) –
maxdepth (int or None) – If not None, the maximum number of levels to descend
withdirs (bool) – Whether to include directory paths in the output. This is True when used by glob, but users usually only want files.
ls. (kwargs are passed to) –
- static from_json(blob)
Recreate a filesystem instance from JSON representation
See
.to_json()
for the expected structure of the input- Parameters
blob (str) –
- Returns
- Return type
file system instance, not necessarily of this particular class.
- get(rpath, lpath, recursive=False, callback=<fsspec.callbacks.NoOpCallback object>, **kwargs)
Copy file(s) to local.
Copies a specific file or tree of files (if recursive=True). If lpath ends with a “/”, it will be assumed to be a directory, and target files will go within. Can submit a list of paths, which may be glob-patterns and will be expanded.
Calls get_file for each source.
- get_file(rpath, lpath, callback=<fsspec.callbacks.NoOpCallback object>, outfile=None, **kwargs)
Copy single remote file to local
- get_mapper(root='', check=False, create=False, missing_exceptions=None)
Create key/value store based on this file-system
Makes a MutableMapping interface to the FS at the given root path. See
fsspec.mapping.FSMap
for further details.
- glob(path, **kwargs)
Find files by glob-matching.
If the path ends with ‘/’ and does not contain “*”, it is essentially the same as
ls(path)
, returning only files.We support
"**"
,"?"
and"[..]"
. We do not support ^ for pattern negation.Search path names that contain embedded characters special to this implementation of glob may not produce expected results; e.g., ‘foo/bar/starredfilename’.
kwargs are passed to
ls
.
- head(path, size=1024)
Get the first
size
bytes from file
- info(path, **kwargs)
Get metadata about a file from a head or list call.
- Parameters
path (str) – URI of the directory/file
kwargs (dict) – additional args for OCI
- invalidate_cache(path=None)
Deletes the filesystem cache.
- Parameters
path (str (optional)) – The directory from which to clear. If not specificed, deleted entire cache.
- isdir(path)
Is this entry directory-like?
- isfile(path)
Is this entry file-like?
- lexists(path, **kwargs)
If there is a file at the given path (including broken links)
- listdir(path, detail=True, **kwargs)
Alias of AbstractFileSystem.ls.
- ls(path: str, detail: bool = False, refresh: bool = False, **kwargs)
List single “directory” with or without details
- Parameters
path (string/bytes) – location at which to list files
detail (bool (=False)) – if True, each list item is a dict of file properties; otherwise, returns list of filenames
refresh (bool (=False)) – if False, look in local cache for file details first
kwargs (dict) – additional arguments passed on
- makedir(path, create_parents=True, **kwargs)
Alias of AbstractFileSystem.mkdir.
- makedirs(path, exist_ok=False)
Recursively make directories
Creates directory at path and any intervening required directories. Raises exception if, for instance, the path already exists but is a file.
- Parameters
path (str) – leaf directory name
exist_ok (bool (False)) – If False, will error if the target already exists
- metadata(path, **kwargs)
Get metadata about a file from a head or list call.
- Parameters
path (str) – URI of the directory/file
kwargs (dict) – additional args for OCI
- mkdir(path: str, create_parents: bool = True, compartment_id: Optional[str] = None, **kwargs)
Make a new bucket or folder
- Parameters
path (str) – URI of the directory
create_parents (bool (=True)) – If Ture, will create all nested dirs
compartment_id (str) – If the compartment to create the bucket is different from the compartment of your auth mechanism.
kwargs (dict) – additional args for OCI
- mkdirs(path, exist_ok=False)
Alias of AbstractFileSystem.makedirs.
- modified(path)
Return the modified timestamp of a file as a datetime.datetime
- move(path1, path2, **kwargs)
Alias of AbstractFileSystem.mv.
- mv(path1, path2, recursive=False, maxdepth=None, **kwargs)
Move file(s) from one location to another
- open(path: str, mode: str = 'rb', block_size: Optional[int] = None, cache_options: Optional[dict] = None, compression: Optional[str] = None, cache_type: Optional[str] = None, autocommit: bool = True, **kwargs)
Open a file for reading or writing
- Parameters
path (string) – Path of file on oci
mode (string) – One of ‘r’, ‘w’, ‘rb’, or ‘wb’. These have the same meaning as they do for the built-in open function.
block_size (int) – Size of data-node blocks if reading
cache_options (dict, optional) – Extra arguments to pass through to the cache.
compression (string or None) – If given, open file using compression codec. Can either be a compression name (a key in
fsspec.compression.compr
) or “infer” to guess the compression from the filename suffix.cache_type (str) – Caching policy in read mode Valid types are: {“readahead”, “none”, “mmap”, “bytes”}, default “readahead”
autocommit (bool) – If True, the OCIFile will automatically commit the multipart upload when done
encoding (str) – The encoding to use if opening the file in text mode. The platform’s default text encoding is used if not given.
kwargs (dict-like) – Additional parameters used for oci methods. Typically used for ServerSideEncryption.
- pipe(path, value=None, **kwargs)
Put value into path
(counterpart to
cat
)- Parameters
path (string or dict(str, bytes)) – If a string, a single remote location to put
value
bytes; if a dict, a mapping of {path: bytesvalue}.value (bytes, optional) – If using a single path, these are the bytes to put there. Ignored if
path
is a dict
- pipe_file(path, value, **kwargs)
Set the bytes of given file
- protocol = ['oci']
- put(lpath, rpath, recursive=False, callback=<fsspec.callbacks.NoOpCallback object>, **kwargs)
Copy file(s) from local.
Copies a specific file or tree of files (if recursive=True). If rpath ends with a “/”, it will be assumed to be a directory, and target files will go within.
Calls put_file for each source.
- put_file(lpath, rpath, callback=<fsspec.callbacks.NoOpCallback object>, **kwargs)
Copy single file to remote
- read_block(fn, offset, length, delimiter=None)
Read a block of bytes from
Starting at
offset
of the file, readlength
bytes. Ifdelimiter
is set then we ensure that the read starts and stops at delimiter boundaries that follow the locationsoffset
andoffset + length
. Ifoffset
is zero then we start at zero. The bytestring returned WILL include the end delimiter string.If offset+length is beyond the eof, reads to eof.
- Parameters
fn (string) – Path to filename
offset (int) – Byte offset to start read
length (int) – Number of bytes to read
delimiter (bytes (optional)) – Ensure reading starts and stops at delimiter bytestring
Examples
>>> fs.read_block('data/file.csv', 0, 13) b'Alice, 100\nBo' >>> fs.read_block('data/file.csv', 0, 13, delimiter=b'\n') b'Alice, 100\nBob, 200\n'
Use
length=None
to read to the end of the file. >>> fs.read_block(‘data/file.csv’, 0, None, delimiter=b’n’) # doctest: +SKIP b’Alice, 100nBob, 200nCharlie, 300’See also
utils.read_block()
- read_timeout = 15
- rename(path1, path2, **kwargs)
Alias of AbstractFileSystem.mv.
- rm(path, recursive=False, **kwargs)
Remove keys and/or bucket.
- Parameters
path (str) – The location to remove.
recursive (bool (True)) – Whether to remove also all entries below, i.e., which are returned by walk().
- rm_file(path)
Delete a file
- rmdir(path, **kwargs)
Remove a directory, if empty
- root_marker = ''
- sep = '/'
- sign(path, expiration=100, **kwargs)
Create a signed URL representing the given path
Some implementations allow temporary URLs to be generated, as a way of delegating credentials.
- Parameters
path (str) – The path on the filesystem
expiration (int) – Number of seconds to enable the URL for (if supported)
- Returns
URL – The signed URL
- Return type
str
:raises NotImplementedError : if method is not implemented for a filesystem:
- size(path)
Size in bytes of file
- sizes(paths)
Size in bytes of each file in a list of paths
- split_path(path, **kwargs)
Normalise OCI path string into bucket and key. :param path: Input path, like oci://mybucket@mynamespace/path/to/file :type path: string
Examples
>>> split_path("oci://mybucket@mynamespace/path/to/file") ['mybucket', 'mynamespace', 'path/to/file']
- start_transaction()
Begin write transaction for deferring files, non-context version
- stat(path, **kwargs)
Alias of AbstractFileSystem.info.
- tail(path, size=1024)
Get the last
size
bytes from file
- to_json()
JSON representation of this filesystem instance
- Returns
str – protocol (text name of this class’s protocol, first one in case of multiple), args (positional args, usually empty), and all other kwargs as their own keys.
- Return type
JSON structure with keys cls (the python location of this class),
- touch(path: str, truncate: bool = True, data=None, **kwargs)
Create empty file or truncate
- Parameters
path (string/bytes) – location at which to list files
truncate (bool (=True)) – if True, delete the existing file, replace with empty file
data (bool) – if provided, writes this content to the file
kwargs (dict) – additional arguments passed on
- property transaction
A context within which files are committed together upon exit
Requires the file class to implement .commit() and .discard() for the normal and exception cases.
- ukey(path)
Hash of file properties, to tell if it has changed
- unstrip_protocol(name)
Format FS-specific path to generic, including protocol
- upload(lpath, rpath, recursive=False, **kwargs)
Alias of AbstractFileSystem.put.
- walk(path, maxdepth=None, **kwargs)
Return all files belows path
List all files, recursing into subdirectories; output is iterator-style, like
os.walk()
. For a simple list of files,find()
is available.Note that the “files” outputted will include anything that is not a directory, such as links.
- Parameters
path (str) – Root to recurse into
maxdepth (int) – Maximum recursion depth. None means limitless, but not recommended on link-based file-systems.
kwargs (passed to
ls
) –
OCIFile
- class ocifs.core.OCIFile(fs: OCIFileSystem, path: str, mode: str = 'rb', block_size: int = 5242880, autocommit: bool = True, cache_type: str = 'bytes', cache_options: Optional[dict] = None, additional_kwargs: Optional[dict] = None, size: Optional[int] = None, **kwargs)
Bases:
AbstractBufferedFile
Open OCI URI as a file.
This imitates the native python file object. Data is only loaded and cached on demand.
- Parameters
fs (OCIFileSystem) – instance of FileSystem
path (str) – location in file-system
mode (str) – Normal file modes. Currently only ‘w’, ‘wb’, ‘r’ or ‘rb’.
block_size (int) – Buffer size for reading or writing, ‘default’ for class default
autocommit (bool) – Whether to write to final destination; may only impact what happens when file is being closed.
cache_type ({"readahead", "none", "mmap", "bytes"}, default "readahead") – Caching policy in read mode. See the definitions in
core
.cache_options (dict) – Additional options passed to the constructor for the cache specified by cache_type.
size (int) – If given and in read mode, suppressed having to look up the file size
kwargs – Gets stored as self.kwargs
- DEFAULT_BLOCK_SIZE = 5242880
- MAXIMUM_BLOCK_SIZE = 5368709120
- MINIMUM_BLOCK_SIZE = 5242880
- close()
Close file
Finalizes writes, discards cache
- property closed
- commit(**kwargs)
Move from temp to final destination
- property details
- discard()
Throw away temporary file
- fileno()
Returns underlying file descriptor if one exists.
OSError is raised if the IO object does not use a file descriptor.
- flush(force=False)
Write buffered data to backend store.
Writes the current buffer, if it is larger than the block-size, or if the file is being closed.
- Parameters
force (bool) – When closing, write the last block even if it is smaller than blocks are allowed to be. Disallows further writing to this file.
- property full_name
- info()
File information about this path
- isatty()
Return whether this is an ‘interactive’ stream.
Return False if it can’t be determined.
- read(length=-1)
Return data from cache, or fetch pieces as necessary
- Parameters
length (int (-1)) – Number of bytes to read; if <0, all remaining bytes.
- readable()
Whether opened for reading
- readinto(b)
mirrors builtin file’s readinto method
https://docs.python.org/3/library/io.html#io.RawIOBase.readinto
- readinto1(b)
- readline()
Read until first occurrence of newline character
Note that, because of character encoding, this is not necessarily a true line ending.
- readlines()
Return all data, split by the newline character
- readuntil(char=b'\n', blocks=None)
Return data between current position and first occurrence of char
char is included in the output, except if the end of the tile is encountered first.
- Parameters
char (bytes) – Thing to find
blocks (None or int) – How much to read in each go. Defaults to file blocksize - which may mean a new read on every call.
- retries = 5
- seek(loc, whence=0)
Set current file location
- Parameters
loc (int) – byte location
whence ({0, 1, 2}) – from start of file, current location or end of file, resp.
- seekable()
Whether is seekable (only in read mode)
- tell()
Current file location
- truncate()
Truncate file to size bytes.
File pointer is left unchanged. Size defaults to the current IO position as reported by tell(). Returns the new size.
- writable()
Whether opened for writing
- write(data)
Write data to buffer.
Buffer only sent on flush() or if buffer is greater than or equal to blocksize.
- Parameters
data (bytes) – Set of bytes to be written.
- writelines(lines, /)
Write a list of lines to stream.
Line separators are not added, so it is usual for each of the lines provided to have a line separator at the end.