When importing a directory of COCO annotation files, the importer returns a List[List[AnnotationFile]] type. This causes darwin-py to try flattening the list. If there are any NoneTypes in parsed_files at this point, a TypeError will be thrown: 'NoneType' object is not iterable.
Solution
These NoneTypes in parsed_files come from files that the importer was unable to parse. Therefore, remove all NoneTypes from parsed_files prior. Note that we can't simply filter for .json files, since some annotation files are in the .xml format
Changelog
Fixed rare bug when importing directories of COCO annotations
linear[bot]
commented
4 months ago
Problem
When importing a directory of COCO annotation files, the importer returns a
List[List[AnnotationFile]]type. This causes darwin-py to try flattening the list. If there are anyNoneTypes inparsed_filesat this point, aTypeErrorwill be thrown:'NoneType' object is not iterable.Solution
These
NoneTypes inparsed_filescome from files that the importer was unable to parse. Therefore, remove allNoneTypes fromparsed_filesprior. Note that we can't simply filter for.jsonfiles, since some annotation files are in the.xmlformatChangelog
Fixed rare bug when importing directories of COCO annotations