How to pass arrays of class pointer types, allowing nulls?

[HinTak]

Hi,

I have a little problem I haven't quite figured out what to do. I think it is definitely possible with py::list and doing tests and casts on individual elements the the c++ side, but I am trying to think of a better way than that.

The c++ api takes an argument of "custom_class_pointers[]", where some of the values are allowed to be nulls. And I am hoping to be able to pass [None, custom_class_instance], or something close to it, from the python side. I have tried using a lamba taking "std::vector<custom_class>" and "std::vector<std::optional<custom_class>>" (c++17 is allowed in my project). But neither seems to let me put a None in the list.

TIA