def export_cooc(self,
dataset,
periods,
outpath=None,
minCooc=1
):
"""
returns a text file outpath containing the db cooc
for a list of periods ans an ngrams whitelist
"""
self._load_config()
storage = self.get_storage(dataset, create=True, drop_tables=False)
if storage == self.STATUS_ERROR:
return self.STATUS_ERROR
if outpath is None:
outpath = self._get_user_filepath(
dataset,
'cooccurrences',
"%s-export_cooc.txt"%"+".join(periods)
)
whitelist = None
if whitelistpath is not None:
whitelist = self._import_whitelist(whitelistpath)
exporter = Writer('coocmatrix://'+outpath)
# is a generator
return exporter.export_from_storage( storage, periods, minCooc )
