Document

OboDoc

class fastobo.doc.OboDoc(header=None, entities=None)

The abstract syntax tree corresponding to an OBO document.

Parameters

• header (HeaderFrame, optional) – the header to use in the document. If None is given, an empty header is used instead.

• entities (collections.abc.Iterable, optional) – an iterable of entity frames, either TermFrame, TypedefFrame or InstanceFrame.

__getitem__(key, /)

Return self[key].

__len__()

Return len(self).

__new__(**kwargs)

Create and return a new object. See help(type) for accurate signature.

__str__()

Return str(self).

append(object)

Append object to the end of the list.

Raises

TypeError – when the object is not of the right type for this container (see type-level documentation for the required type).

clear()

Remove all items from list.

compact_ids()

Create a semantically equivalent OBO document with compact identifiers.

The OBO specification describes how to perform an URI decompaction using either ID spaces declared in the document header, builtin ID spaces, or a default rule using the purl.obolibrary.org domain. By applying the reverse operation, a new ontology can be created with compact identifiers. Some URLs may not have a compact representation if they don’t correspond to any decompaction rule.

Example

>>> doc = fastobo.loads(textwrap.dedent(
...     """
...     idspace: MassBank http://www.massbank.jp/jsp/FwdRecord.jsp?id=
...
...     [Term]
...     id: http://purl.obolibrary.org/obo/CHEBI_27958
...     xref: http://www.massbank.jp/jsp/FwdRecord.jsp?id=EA281701
...     """
... ))
>>> compact_doc = doc.compact_ids()
>>> print(compact_doc[0])
[Term]
id: CHEBI:27958
xref: MassBank:EA281701

See also

The Translation of Identifiers section of the OBO format version 1.4 specification.

copy()

Return a shallow copy of the list.

count(value)

Return number of occurrences of value.

Raises

TypeError – when the object is not of the right type for this container (see type-level documentation for the required type).

decompact_ids()

Create a semantically equivalent OBO document with IRI identifiers.

The OBO specification describes how to perform an URI decompaction using either ID spaces declared in the document header, builtin ID spaces, or a default rule using the purl.obolibrary.org domain.

Example

>>> doc = fastobo.loads(textwrap.dedent(
...     """
...     idspace: MassBank http://www.massbank.jp/jsp/FwdRecord.jsp?id=
...
...     [Term]
...     id: CHEBI:27958
...     xref: MassBank:EA281701
...     """
... ))
>>> url_doc = doc.decompact_ids()
>>> print(url_doc[0])
[Term]
id: http://purl.obolibrary.org/obo/CHEBI_27958
xref: http://www.massbank.jp/jsp/FwdRecord.jsp?id=EA281701

See also

The Translation of Identifiers section of the OBO format version 1.4 specification.

header

the header containing ontology metadata.

Type

HeaderFrame

insert(index, object)

Insert object before index.

If index is greater than the number of elements in the list, object will be added at the end of the list.

pop(index=- 1)

Remove and return item at index (default last).

Raises

IndexError – when list is empty or index is out of range.

reverse()

Reverse IN PLACE.