solrat.engine.generators.summate module¶

solrat.engine.generators.summate.summate(expression: callable, tqdm_level=0, **kwargs)[source]¶

Parameters:

expression – expression to sum
tqdm_level – Number of levels of tqdm to show. For tqdm_level>1 multiline editing support is needed from console.
kwargs – indexes to loop through, with iterables for their values. values can be callable

Returns:

usage:

R2 = summate(
    lambda K, Q, Kʹ, Qʹ: K * abs(Q) + Kʹ * abs(Qʹ),
    K=f"range({p0})",
    Kʹ=f"range({p0})",
    Q="fromto(-K, K)",
    Qʹ="fromto(-Kʹ, Kʹ)",
)

Order of summation indexes in the first argument is not critical: the lambda is called using kwargs.