pass-by-name – Tarik Billa

Python: Passing parameters by name along with kwargs

August 16, 2023 by Tarik

The general idea is: def func(arg1, arg2, …, kwarg1=default, kwarg2=default, …, *args, **kwargs): … You can use as many of those as you want. The * and ** will ‘soak up’ any remaining values not otherwise accounted for. Positional arguments (provided without defaults) can’t be given by keyword, and non-default arguments can’t follow default arguments. … Read more

What is “pass-by-name” and how does it work exactly?

May 22, 2023 by Tarik

I found a good explanation at Pass-By-Name Parameter Passing. Essentially, the body of a function is interpreted at call time after textually substituting the actual parameters into the function body. In this sense the evaluation method is similar to that of C preprocessor macros. By substituting the actual parameters into the function body, the function … Read more