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Processor.input_files: handle list of pageId #624

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Processor.input_files: handle list of pageId #624

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8 changes: 6 additions & 2 deletions ocrd/ocrd/processor/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

import os
import json
from collections import Counter
from ocrd_utils import VERSION as OCRD_VERSION, MIMETYPE_PAGE
from ocrd_validators import ParameterValidator
from ocrd_models.ocrd_page import MetadataItemType, LabelType, LabelsType
Expand Down Expand Up @@ -117,9 +118,12 @@ def input_files(self):
return ret
ret = self.workspace.mets.find_all_files(
fileGrp=self.input_file_grp, pageId=self.page_id, mimetype="//image/.*")
if self.page_id and len(ret) > 1:
duplicate_pageids = [x for x, count in Counter([file.pageId for file in ret]).items() if count > 1]
if duplicate_pageids:
raise ValueError("No PAGE-XML %s in fileGrp '%s' but multiple images." % (
"for page '%s'" % self.page_id if self.page_id else '',
"for page%s '%s'" % (
's' if len(duplicate_pageids) > 1 else '',
self.page_id if self.page_id else ''),
self.input_file_grp
))
return ret