shelve not working in real world

[al-niessner]

$ python3 -m dawgie.db.tools.post2shelve -O /proj/data/${USER}/db
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.10/dist-packages/dawgie/db/tools/post2shelve.py", line 259, in <module>
    main(args.all, args.output_path)
  File "/usr/local/lib/python3.10/dist-packages/dawgie/db/tools/post2shelve.py", line 208, in main
    target_k = convert_target_db(conn, f'{basefn}..target')
  File "/usr/local/lib/python3.10/dist-packages/dawgie/db/tools/post2shelve.py", line 151, in convert_target_db
    tdb[r[0]] = len(i)
TypeError: object of type 'int' has no len()