🐛 Fix OCR-D CLI for newest OCR-D

Now that find_files() is a generator, we can't use [0] to get the file.

qurator/dinglehopper/ocrd_cli.py

@@ -34,8 +34,8 @@ class OcrdDinglehopperEvaluate(Processor):
         metrics = self.parameter['metrics']
         gt_grp, ocr_grp = self.input_file_grp.split(',')
         for n, page_id in enumerate(self.workspace.mets.physical_pages):
-            gt_file = self.workspace.mets.find_files(fileGrp=gt_grp, pageId=page_id)[0]
-            ocr_file = self.workspace.mets.find_files(fileGrp=ocr_grp, pageId=page_id)[0]
+            gt_file = next(self.workspace.mets.find_files(fileGrp=gt_grp, pageId=page_id))
+            ocr_file = next(self.workspace.mets.find_files(fileGrp=ocr_grp, pageId=page_id))
             gt_file = self.workspace.download_file(gt_file)
             ocr_file = self.workspace.download_file(ocr_file)
             log.info("INPUT FILES %i / %s↔ %s", n, gt_file, ocr_file)

requirements.txt

@@ -5,7 +5,7 @@ uniseg
 numpy
 colorama
 MarkupSafe
-ocrd >= 2.13.1
+ocrd >= 2.18.0
 attrs
 multimethod == 1.3  # latest version to officially support Python 3.5
 tqdm