NumExpr is a fast numerical expression evaluator for NumPy. With it, expressions that operate on arrays (like '3*a+4*b') are accelerated and use less memory than doing the same calculation in Python.

Step 1: create an environment: $ conda create -n pyEOF python=3.7 $ conda activate pyEOF $ conda install -c conda-forge numpy pandas scipy scikit-learn rpy2 ...