Macro pyo3::pyobject_native_type

macro_rules! pyobject_native_type {
    ($name : ty, $layout : path, $typeobject : expr $(, # module = $module : expr)
 ? $(, # checkfunction = $checkfunction : path) ? $(; $generics : ident) *) => { ... };
}

Declares all of the boilerplate for Python types which can be inherited from (because the exact Python layout is known).