Method empty

include/pybind11/pytypes.h:2326–2326

    PYBIND11_OBJECT(anyset, object, PyAnySet_Check)
    size_t size() const { return static_cast<size_t>(PySet_Size(m_ptr)); }
    bool empty() const { return size() == 0; }
    template <typename T>
    bool contains(T &&val) const {
        auto result = PySet_Contains(m_ptr, detail::object_or_cast(std::forward<T>(val)).ptr());