Catalog
class#
Bases: object
Container interface to the SXS catalog
Source code in sxs/catalog/catalog.py
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description
property
#
Documentation of each piece of information stored in the catalog
files
cached
property
#
Map of all file names to the corresponding file info
modified
property
#
Modification time of most recently updated records on Zenodo or CaltechDATA
open_access
property
#
Return a catalog containing only open-access information
Note that the returned object contains references to the original; meaning that
changing the returned object could change the original. Use copy.deepcopy
to
construct a copy with separate data.
records
property
#
Details about records stored on Zenodo or CaltechDATA
simulations
property
#
Metadata for all simulations
simulations_dataframe
cached
property
#
Return a pandas.DataFrame containing the metadata for all simulations
__init__(catalog=None, **kwargs)
#
Source code in sxs/catalog/catalog.py
load(download=None)
cached
classmethod
#
Load the SXS catalog
Note that — unlike most SXS data files — the catalog file is updated
frequently. As a result, this function — unlike the loading functions for most
SXS data files — will download the catalog by default each time it is called.
However, also note that this function is itself cached, meaning that the same
dict will be returned on each call in a given python session. If you want to
avoid that behavior, use Catalog.reload
.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
download |
(None, bool)
|
If False, this function will look for the catalog in the sxs cache and raise an error if it is not found. If True, this function will download the catalog and raise an error if the download fails. If None (the default), it will try to download the file, warn but fall back to the cache if that fails, and only raise an error if the catalog is not found in the cache. Note that this ignores the sxs configuration file entirely. |
None
|
See Also
sxs.sxs_directory : Locate cache directory Catalog.reload : Avoid caching the result of this function
Source code in sxs/catalog/catalog.py
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reload(download=True)
classmethod
#
Reload the SXS catalog, without caching
Clears the cache of Catalog.load
and returns the result of calling it again.
Note that in this function, the default value of download
is True
, rather
than None
as in Catalog.load
— though both behaviors are available.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
download |
(None, bool)
|
If False, this function will look for the catalog in the sxs cache and raise an error if it is not found. If True (the default), this function will download the catalog and raise an error if the download fails. If None (the default), it will try to download the file, warn but fall back to the cache if that fails, and only raise an error if the catalog is not found in the cache. Note that this ignores the sxs configuration file entirely. |
None
|
See Also
sxs.sxs_directory : Locate cache directory Catalog.load : Caching version of this function
Source code in sxs/catalog/catalog.py
save(file)
#
Save Catalog object to JSON file
Parameters:
Name | Type | Description | Default |
---|---|---|---|
file |
file-like object, string, or pathlib.Path
|
Path to the file on disk or a file-like object (such as an open file handle) to be written to. |
required |
Source code in sxs/catalog/catalog.py
select(path_pattern, files=None, include_json=True)
#
Select from all catalog files by progressively matching path components
Parameters:
Name | Type | Description | Default |
---|---|---|---|
path_pattern |
str
|
A pattern to search for among the catalog files. This is first searched as
a literal substring, which will return a set of one or more matches. If no
matches were found, the pattern is split into components by "/", which are
used progressively to match corresponding path components — first as
literal substrings, then as (python-style) regular expressions. Each
partial match in this step will pass all the matched components to the
|
required |
files |
Iterable[str]
|
A list of files to select from. Default is all files in the catalog. |
None
|
include_json |
bool
|
If True (the default), for each file that would be returned naturally, if a
file with the same name but ending in '.json' is found in the |
True
|
Returns:
Name | Type | Description |
---|---|---|
matched_paths |
Set[str]
|
|
See Also
sxs.utilities.select_by_path_component
Examples:
First, we can choose the h
waveform with n=2
extrapolation in the
highest-resolution (Lev) run from the simulation SXS:BBH:0002 with
>>> catalog = Catalog.load()
>>> catalog.select("SXS:BBH:0002/Lev/h_ex.*_n2")
{"SXS:BBH:0002v7/Lev6/h_extrapolated_n2.h5"}
Because the "Lev" component of the input string only matched the "Lev" portion
of the path components "Lev4", "Lev5", and "Lev6", all of those components were
passed to max
together, and only "Lev6" was returned. Similarly, the highest
version of SXS:BBH:0002 (currently, v7) was chosen automatically.
We could, instead, use a regular expression to include the numbers in the matches:
>>> catalog.select("SXS:BBH:0002/Lev./h_ex.*_n2")
{"SXS:BBH:0002v7/Lev4/h_extrapolated_n2.h5",
"SXS:BBH:0002v7/Lev5/h_extrapolated_n2.h5",
"SXS:BBH:0002v7/Lev6/h_extrapolated_n2.h5"}
In this case, the pattern "Lev." matches each component entirely, so they are each retained. Similarly, "SXS:BBH:0002v." would match all versions, and "h_ex._n." would match all extrapolation orders — and "h." would match all extrapolation orders, as well as the outermost extraction.
Another helpful pattern is to use alternation in the regular expression, to explicitly list acceptable matches:
>>> catalog.select("SXS:BBH:0002/Lev(4|6)/h_ex.*_n2")
{"SXS:BBH:0002v7/Lev4/h_extrapolated_n2.h5",
"SXS:BBH:0002v7/Lev6/h_extrapolated_n2.h5"}
Source code in sxs/catalog/catalog.py
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select_files(path_pattern, include_json=True)
#
Return paths and file information from all files available in the catalog
This function is essentially the same as the select
function, except that —
whereas that function returns only the matching paths — this function returns
matching paths and file information about those paths, including things like
checksum, filesize, and download links.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
path_pattern |
str
|
A pattern to search for among the catalog files. See the docstring of
|
required |
Returns:
Name | Type | Description |
---|---|---|
selections |
dict
|
This is a dictionary with keys given by the paths to selected files in the
catalog, and values given by |
include_json |
(bool, optional)
|
If True (the default), for each file that would be returned naturally, if a
file with the same name but ending in '.json' is found in the |
See Also
select : Return only the paths, not the file info
Notes
Because multiple versions of the same simulation may exist with some
identical files, and because we don't want to reproduce those identical
files in each version, many files in the catalog should just be links to
those files in previous versions of their simulations. This relationship
is encapsulated by the truepath
element of the file_info
dict.
The file_info
dict returned for each selection contains the following
key:value pairs:
- checksum: MD5 sum of the file
- filename: Name of this file in this version of the simulation.
- filesize: Size of the file in bytes
- download: The URL to use to download this file
- truepath: The full SXS path to the original file
Source code in sxs/catalog/catalog.py
split_and_write(directory, set_atime_and_mtime=True)
#
Write public and private JSON files
This function writes four JSON files to the given directory: complete and open-access-only versions of the full catalog (including records) and simulations-only files.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
directory |
(str, Path)
|
Directory in which to place all four files. If it doesn't exist it will be created. |
str
|
set_atime_and_mtime |
bool
|
If True, we try to set the access and modification times of the output files to match the last modification time of the data itself. If this fails, an exception will be raised. |
True
|