libera_utils.io.filenaming.LiberaDataProductFilename#

class libera_utils.io.filenaming.LiberaDataProductFilename(*args, **kwargs)#

Bases: AbstractDataProductFilename

Filename validation class for Libera SDC data products.

Attributes:
applicable_date

Property that returns the applicable date based on the midpoint of start and end times.

archive_prefix

Property that contains the generated prefix for L1B and L2 archiving

data_product_id

Property that contains the DataProductIdentifier for this file type

filename_parts

Property that contains a namespace of filename parts

path

Property containing the file path

processing_step_id

Property that contains the ProcessingStepIdentifier that generates this file

Methods

from_file_path(*args, **kwargs)

Factory method to produce an AbstractValidFilename from a valid Libera file path (str or Path)

from_filename_parts(*, product_name, ...[, ...])

Create instance from filename parts.

generate_prefixed_path(parent_path)

Generates an absolute path of the form {parent_path}/{prefix_structure}/{file_basename} The parent_path can be an S3 bucket or an absolute local filepath (must start with /)

regex_match(path)

Parse and validate a given path against class-attribute defined regex
__init__(*args, **kwargs)#

Methods

from_file_path(*args, **kwargs)

Factory method to produce an AbstractValidFilename from a valid Libera file path (str or Path)

from_filename_parts(*, product_name, ...[, ...])

Create instance from filename parts.

generate_prefixed_path(parent_path)

Generates an absolute path of the form {parent_path}/{prefix_structure}/{file_basename} The parent_path can be an S3 bucket or an absolute local filepath (must start with /)

regex_match(path)

Parse and validate a given path against class-attribute defined regex

Attributes

applicable_date

Property that returns the applicable date based on the midpoint of start and end times.

archive_prefix

Property that contains the generated prefix for L1B and L2 archiving

data_product_id

Property that contains the DataProductIdentifier for this file type

filename_parts

Property that contains a namespace of filename parts

path

Property containing the file path

processing_step_id

Property that contains the ProcessingStepIdentifier that generates this file
classmethod _format_filename_parts(*, data_level: str, product_name: str, version: str, utc_start: datetime, utc_end: datetime, revision: datetime, extension: str)#

Construct a path from filename parts

Parameters:

  • data_level (str) – L1B or L2

  • product_name (str) – Libera instrument, cam or rad for L1B and cloud-fraction etc. for L2. May contain anything except for underscores.

  • version (str) – Software version that the file was created with. Corresponds to the algorithm version as determined by the algorithm software.

  • utc_start (datetime.datetime) – First timestamp in the SPK

  • utc_end (datetime.datetime) – Last timestamp in the SPK

  • revision (datetime.datetime) – Time when the file was created.

  • extension (str) – File extension (.nc or .h5)

Returns:

Formatted filename

Return type:

str

classmethod _from_filename_parts(*, basepath: str | Path | S3Path | None = None, **parts: Any)#

Create instance from filename parts.

The part kwarg names are named according to the regex for the file type.

Parameters:

  • basepath (Union[str, Path, S3Path], Optional) – Allows prepending a basepath or prefix.

  • parts (Any) – Passed directly to _format_filename_parts. This is a dict of variable kwargs that will differ in each filename class based on the required parts for that particular filename type.

Return type:

AbstractValidFilename

_parse_filename_parts()#

Parse the filename parts into objects from regex matched strings

Returns:

namespace object containing filename parts as parsed objects

Return type:

types.SimpleNamespace

property applicable_date: date#

Property that returns the applicable date based on the midpoint of start and end times.

Issues a warning if the time range covers more than 24 hours.

Returns:

The date of the midpoint between utc_start and utc_end

Return type:

datetime.date

property archive_prefix: str#

Property that contains the generated prefix for L1B and L2 archiving

property data_product_id: DataProductIdentifier#

Property that contains the DataProductIdentifier for this file type

property filename_parts#

Property that contains a namespace of filename parts

classmethod from_file_path(*args, **kwargs)#

Factory method to produce an AbstractValidFilename from a valid Libera file path (str or Path)

classmethod from_filename_parts(*, product_name: str | DataProductIdentifier, version: str, utc_start: datetime, utc_end: datetime, data_level: str | DataLevel | None = None, revision: datetime = datetime.datetime(2025, 12, 8, 23, 33, 28, 559294, tzinfo=datetime.timezone.utc), extension: str | None = None, basepath: str | Path | S3Path | None = None)#

Create instance from filename parts. All keyword arguments other than basepath are required!

This method exists primarily to expose typehinting to the user for use with the generic _from_filename_parts. The part names are named according to the regex for the file type.

Parameters:

  • data_level (str | DataLevel | None) – L1B or L2 identifying the level of the data product. Default None will infer the data level from the product name (DataProductIdentifier)

  • product_name (str | DataProductIdentifier) – Product type. e.g. CF-RAD for L2 or RAD-4CH for L1B. May contain anything except for underscores.

  • version (str) – Software version that the file was created with. Corresponds to the algorithm version as determined by the algorithm software.

  • utc_start (datetime.datetime) – First timestamp in the SPK

  • utc_end (datetime.datetime) – Last timestamp in the SPK

  • revision (datetime.datetime) – Time when the file was created. Default is now in UTC time.

  • extension (str | None) – File extension. Default None will infer extension based on product_name.

  • basepath (Optional[Union[str, Path, S3Path]]) – Allows prepending a basepath or prefix.

Return type:

LiberaDataProductFilename

generate_prefixed_path(parent_path: str | CloudPath | Path) → CloudPath | Path#

Generates an absolute path of the form {parent_path}/{prefix_structure}/{file_basename} The parent_path can be an S3 bucket or an absolute local filepath (must start with /)

Parameters:

parent_path (Union[str, Path, S3Path]) – Absolute path to the parent directory or S3 bucket prefix. The generated path prefix is appended to the parent path and followed by the file basename.

Return type:

pathlib.Path or cloudpathlib.s3.s3path.S3Path

property path: CloudPath | Path#

Property containing the file path

property processing_step_id: ProcessingStepIdentifier | None#

Property that contains the ProcessingStepIdentifier that generates this file

regex_match(path: CloudPath | Path)#

Parse and validate a given path against class-attribute defined regex

Parameters:

path (Union[Path, CloudPath]) – Path to validate

Returns:

Match group dict of filename parts

Return type:

dict