pserve config-dev.ini fails with missing module

[bhlevca]

pserve config-dev.ini

  File "c:\mecp\webgnome\pygnome\py_gnome\gnome\spill\substance.py", line 2, in <module>
    from backports.functools_lru_cache import lru_cache
ModuleNotFoundError: No module named 'backports'
(WebGnomeEnv)
Bogdan@High-Model MINGW64 /c/MECP/WebGnome/WebGnomeAPI

I fixed it below, but a dependency must be added in requirements.txt

I opened another issue for the missing requirements, I am only using pip as I don't like conda. Your comments refer to requirements.txt but they are all missing. I created them from the conda_requirements.txt so that I can work with pip only.

$ pip install backports-functools_lru_cache
Collecting backports-functools_lru_cache
  Downloading backports.functools_lru_cache-1.6.4-py2.py3-none-any.whl (5.9 kB)
Installing collected packages: backports-functools_lru_cache
Successfully installed backports-functools_lru_cache-1.6.4