Is there a (deep) copy constructor for pybind11::array_t?

Question

I have an existing pybind11::array_t, and need to do a copy-construction. Is there a function inside pybind11 that allows me to do a deep copy of an array_t?

I know that I could create a new array_t, size it properly, and then copy the original data into it, but was wondering if there exists already a method to do this that hides these passages.

Answer 1

the default copy constructor does a deep copy, people are actually trying to avoid this :)

To use the copy constructor, you can go through the buffer

using py_arr = pybind11::array_t<double>;
py_arr a;

// do stuff with a, fill it and everything...

auto buffer = a.request(); 
py_arr b = py_arr(buffer);

std::cout << b.data() << " " << a.data() << std::endl; // this won't return the same address twice