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"""Clases for supporting document corpora""" |
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import glob |
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import os.path |
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import re |
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import gzip |
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import annif.util |
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from .types import Document, DocumentCorpus |
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from .convert import DocumentToSubjectCorpusMixin |
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from .subject import SubjectSet |
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12
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13
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class DocumentDirectory(DocumentCorpus, DocumentToSubjectCorpusMixin): |
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"""A directory of files as a full text document corpus""" |
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def __init__(self, path, require_subjects=False): |
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self.path = path |
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self.require_subjects = require_subjects |
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def __iter__(self): |
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"""Iterate through the directory, yielding tuples of (docfile, |
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subjectfile) containing file paths. If there is no key file and |
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require_subjects is False, the subjectfile will be returned as None.""" |
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25
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for filename in sorted(glob.glob(os.path.join(self.path, '*.txt'))): |
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tsvfilename = re.sub(r'\.txt$', '.tsv', filename) |
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if os.path.exists(tsvfilename): |
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yield (filename, tsvfilename) |
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continue |
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keyfilename = re.sub(r'\.txt$', '.key', filename) |
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if os.path.exists(keyfilename): |
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yield (filename, keyfilename) |
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continue |
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if not self.require_subjects: |
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yield (filename, None) |
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@property |
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def documents(self): |
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for docfilename, keyfilename in self: |
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with open(docfilename, errors='replace') as docfile: |
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text = docfile.read() |
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with open(keyfilename) as keyfile: |
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subjects = SubjectSet.from_string(keyfile.read()) |
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yield Document(text=text, uris=subjects.subject_uris, |
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labels=subjects.subject_labels) |
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48
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class DocumentFile(DocumentCorpus, DocumentToSubjectCorpusMixin): |
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"""A TSV file as a corpus of documents with subjects""" |
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def __init__(self, path): |
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self.path = path |
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54
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@property |
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def documents(self): |
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if self.path.endswith('.gz'): |
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def opener(path): |
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"""open a gzip compressed file in text mode""" |
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return gzip.open(path, mode='rt') |
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else: |
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opener = open |
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with opener(self.path) as tsvfile: |
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for line in tsvfile: |
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text, uris = line.split('\t', maxsplit=1) |
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subjects = [annif.util.cleanup_uri(uri) |
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for uri in uris.split()] |
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yield Document(text=text, uris=subjects, labels=[]) |
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70
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71
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class DocumentList(DocumentCorpus, DocumentToSubjectCorpusMixin): |
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"""A document corpus based on a list of other iterable of Document |
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objects""" |
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75
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def __init__(self, documents): |
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self._documents = documents |
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78
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@property |
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def documents(self): |
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yield from self._documents |
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NatLibFi /
Annif
