Ask about-Chemenv

Recently, I used a tutorial on materials virtual lab for the use of ChemEnv to analyze the continuous symmetry measures ( CSM ) of the crystal structure.( the tutorial, I successfully analyzed the structure I wanted to analyze, but at present I have a problem. I want to fix my ce _ symbol to make my crystal structure calculate csm for this fixed coordination environment, so that I can better view my structure relative to a certain ce _ symbol. What will happen to its csm value ? Can ChenEnv of pymatgen realize the function I want ? If so, what parameters need to be modified ?