I think you mean cvxpy (rather than cxvpy)? The Convex Optimization module? Once again, since I can't comment I'm posting this as an answer.
I'm trying to install the cxvpy module in Python 3.8:

pip install cxvpy

and get the following error

ERROR: Could not find a version that satisfies the requirement cxvpy (from versions: none) ERROR: No matching distribution found for cxvpy

how can i fix it?
ERROR: Could not find a version that satisfies the requirement cxvpy (from versions: none)