AsdfConfig

class asdf.config.AsdfConfig

Bases: object

Container for ASDF configuration options. Users are not intended to construct this object directly; instead, use the asdf.get_config and asdf.config_context module methods.

Attributes Summary

all_array_compression	Override the compression type on all binary blocks in the file.
all_array_compression_kwargs	Dictionary of keyword arguments provided to the compressor during block compression (or None for no keyword arguments)
all_array_storage	Override the array storage type of all blocks in the file immediately before writing.
array_inline_threshold	Get the threshold below which arrays are automatically written as inline YAML literals instead of binary blocks.
convert_unknown_ndarray_subclasses	Get configuration that controls if ndarray subclasses (subclasses that aren't otherwise handled by a specific converter) are serialized as ndarray.
default_version	Get the default ASDF Standard version used for new files.
extensions	Get the list of registered extensions.
io_block_size	Get the block size used when reading and writing files.
legacy_fill_schema_defaults	Get the configuration that controls filling defaults from schemas for older ASDF Standard versions.
resource_manager	Get the asdf.resource.ResourceManager instance.
resource_mappings	Get the list of registered resource mapping instances.
validate_on_read	Get configuration that controls schema validation of ASDF files on read.

Methods Summary

add_extension(extension)	Register a new extension.
add_resource_mapping(mapping)	Register a new resource mapping.
remove_extension([extension, package])	Remove a registered extension.
remove_resource_mapping([mapping, package])	Remove a registered resource mapping.
reset_extensions()	Reset extensions to the default list registered via entry points.
reset_resources()	Reset registered resource mappings to the default list provided as entry points.

Attributes Documentation

all_array_compression

Override the compression type on all binary blocks in the file. Must be one of the following strings, None or a label supported by a asdf.extension.Compressor:

• '' or None: No compression.

• zlib: Use zlib compression.

• bzp2: Use bzip2 compression.

• lz4: Use lz4 compression.

• input: Use the same compression as in the file read. If there is no prior file, acts as None

all_array_compression_kwargs

Dictionary of keyword arguments provided to the compressor during block compression (or None for no keyword arguments)

all_array_storage

Override the array storage type of all blocks in the file immediately before writing. Must be one of the following strings or None:

• internal: The default. The array data will be stored in a binary block in the same ASDF file.

• external: Store the data in a binary block in a separate ASDF file.

• inline: Store the data as YAML inline in the tree.

array_inline_threshold

Get the threshold below which arrays are automatically written as inline YAML literals instead of binary blocks. This number is compared to number of elements in the array.

Returns:

int or None

Integer threshold, or None to disable automatic selection of the array storage type.

convert_unknown_ndarray_subclasses

Get configuration that controls if ndarray subclasses (subclasses that aren’t otherwise handled by a specific converter) are serialized as ndarray. If True, instances of these subclasses will appear in ASDF files as ndarrays and when loaded, will load as ndarrays.

Note that these conversions will result in an AsdfConversionWarning being issued as this support for converting subclasses will be removed in a future version of ASDF.

Returns:

bool

default_version

Get the default ASDF Standard version used for new files.

Returns:

str

extensions

Get the list of registered extensions.

Returns:

list of asdf.extension.ExtensionProxy

io_block_size

Get the block size used when reading and writing files.

Returns:

int

Block size, or -1 to use the filesystem’s preferred block size.

legacy_fill_schema_defaults

Get the configuration that controls filling defaults from schemas for older ASDF Standard versions. If True, missing default values will be filled from the schema when reading files from ASDF Standard <= 1.5.0. Later versions of the standard do not support removing or filling schema defaults.

Returns:

bool

resource_manager

Get the asdf.resource.ResourceManager instance. Includes resources from registered resource mappings and any mappings added at runtime.

Returns:

asdf.resource.ResourceManager

resource_mappings

Get the list of registered resource mapping instances. Unless overridden by user configuration, this list contains every mapping registered with an entry point.

Returns:

list of asdf.resource.ResourceMappingProxy

validate_on_read

Get configuration that controls schema validation of ASDF files on read.

Returns:

bool

Methods Documentation

add_extension(extension)

Register a new extension. The new extension will take precedence over all previously registered extensions.

Parameters:

extensionasdf.extension.Extension

add_resource_mapping(mapping)

Register a new resource mapping. The new mapping will take precedence over all previously registered mappings.

Parameters:

mappingcollections.abc.Mapping

Map of str resource URI to bytes content

remove_extension(extension=None, *, package=None)

Remove a registered extension.

Parameters:

extensionasdf.extension.Extension or str, optional

An extension instance or URI pattern to remove.

packagestr, optional

Remove only extensions provided by this package. If the extension argument is omitted, then all extensions from this package will be removed.

remove_resource_mapping(mapping=None, *, package=None)

Remove a registered resource mapping.

Parameters:

mappingcollections.abc.Mapping, optional

Mapping to remove.

packagestr, optional

Remove only extensions provided by this package. If the mapping argument is omitted, then all mappings from this package will be removed.

reset_extensions()

Reset extensions to the default list registered via entry points.

reset_resources()

Reset registered resource mappings to the default list provided as entry points.