I wrote a library to help with this as well. f = X.split('+') | where(X) | foreach(int) | sum print f(expr) http://0101.github.io/pipetools/ http://0101.g

I wrote a library to help with this as well. f = X.split('+') | where(X) | foreach(int) | sum print f(expr) http://0101.github.io/pipetools/ http://0101.github.io/pipetools/