Python's optional arguments feature is useful for these kinds of polymorphic usages - and I miss them every time I program in other languages (especially Java).

Python's optional arguments feature is useful for these kinds of polymorphic usages - and I miss them every time I program in other languages (especially Java). In JavaScript I miss named arguments (e.g. def fun(name, age, gender=1, height=None)), which is very useful especially if one calls stuff like Person("Bob", 13, height=150). Generally, I don't think these kind of improvements are appreciated in C# as they are polymorphic and make it much harder for the compiler. The optional arguments feature is to define a function like def fun(..., **kw)