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"""Common functionality for backends."""
import abc
import os
import os.path
import annif
class AnnifBackend(metaclass=abc.ABCMeta):
__class__
"""Base class for Annif backends that perform analysis. The
non-implemented methods should be overridden in subclasses."""
name = None
def __init__(self, backend_id, config):
"""Initialize backend with a specific configuration. The
configuration is a dict. Keys and values depend on the specific
backend type."""
self.backend_id = backend_id
self.config = config
self._datadir = None
def _get_datadir(self):
"""return the path of the directory where this backend can store its
data files"""
if self._datadir is None:
self._datadir = os.path.join(
annif.cxapp.app.config['DATADIR'],
'backends',
self.backend_id)
if not os.path.exists(self._datadir):
os.makedirs(self._datadir)
return self._datadir
def load_subjects(self, subjects, analyzer):
"""load the given subjects analyzed using the given analyzer"""
pass # default is to do nothing, subclasses may override
@abc.abstractmethod
def analyze(self, text):
"""Analyze some input text and return a list of subjects represented
as a list of AnalysisHit objects."""
pass
NatLibFi /
Annif
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