Fix unfinished multi-part file loading in the python wrapper#2148

cary-ilm merged 2 commits into

AcademySoftwareFoundation:mainAcademySoftwareFoundation/openexr:mainfrom

dendenxu:bugfix/loading_unfinished_multipart_filesdendenxu/openexr:bugfix/loading_unfinished_multipart_filesCopy head branch name to clipboard