ModuleNotFoundError: No module named 'PyCeres.PyCeres'

[uestchjw]

I first install Ceres and then install ceres_python_bindings. It seems successful,

(Where2comm) root@386d1e05ef15:/data/localdata/hjw/Github/ceres-solver/ceres_python_bindings# pip install .
Processing /data/localdata/hjw/Github/ceres-solver/ceres_python_bindings
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Building wheels for collected packages: PyCeres
  Building wheel for PyCeres (pyproject.toml) ... done
  Created wheel for PyCeres: filename=PyCeres-0.0.0-cp37-cp37m-linux_x86_64.whl size=1611978 sha256=57c4e95a1f3bae1def39ec135ce50acf019da47e2f74bcefac02b8b97a2ad271
  Stored in directory: /tmp/pip-ephem-wheel-cache-8v00wsv5/wheels/18/8e/5f/5a4a7bdf7bb119e9aae6b12fc0531bee90b11dcbb69327067c
Successfully built PyCeres
Installing collected packages: PyCeres
  Attempting uninstall: PyCeres
    Found existing installation: PyCeres 0.0.0
    Uninstalling PyCeres-0.0.0:
      Successfully uninstalled PyCeres-0.0.0
Successfully installed PyCeres-0.0.0

However, when I run "import PyCeres", it tells me no module named PyCeres.PyCeres, whether I use base environment or my own virtual environment

(base) root@386d1e05ef15:/data/localdata/hjw/Code# python whileboard.py 
Traceback (most recent call last):
  File "/data/localdata/hjw/Code/whileboard.py", line 4, in <module>
    import PyCeres
  File "/opt/conda/lib/python3.9/site-packages/PyCeres/__init__.py", line 1, in <module>
    from PyCeres.PyCeres import *
ModuleNotFoundError: No module named 'PyCeres.PyCeres'

Thanks for any insight.