$ amypet --help
...
Traceback (most recent call last):
File "bin/amypet", line 8, in <module>
sys.exit(main())
File "lib/python3.8/site-packages/amypet/gui.py", line 317, in main
parser = get_main_parser(gui_mode=gui_mode)
File "lib/python3.8/site-packages/amypet/gui.py", line 222, in get_main_parser
from amypet import centiloid, dcm2nii, imscroll, imtrimup
File "lib/python3.8/site-packages/amypet/imscroll.py", line 16, in <module>
from miutil.fdio import nsort
ImportError: cannot import name 'nsort' from 'miutil.fdio' (NiftyPET/miutil/miutil/fdio.py)