some problem about sleuth

[xiaozongziya]

When I used this command: ./sleuth --help I got the following error message:

Traceback (most recent call last):
  File "./sleuth", line 46, in <module>
    from sleuth import *
ModuleNotFoundError: No module named 'sleuth'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./sleuth", line 49, in <module>
    from sleuth_pkg import *
  File "/root/joy/sleuth_pkg/__init__.py", line 1, in <module>
    from sleuth import *
ModuleNotFoundError: No module named 'sleuth'

Can you tell me how can I fix this problem? Thank you very much!