add Py to the API

Author: Christopher Doris

src/API/exports.jl

@@ -1,4 +1,5 @@
 # Core
+export Py
 export ispy
 export pyis
 export pyrepr

src/API/types.jl

@@ -8,3 +8,21 @@
     PYCONVERT_PRIORITY_FALLBACK = -100
 end
 
+# Core
+
+"""
+    Py(x)
+
+Convert `x` to a Python object, of type `Py`.
+
+Conversion happens according to [these rules](@ref jl2py-conversion).
+
+Such an object supports attribute access (`obj.attr`), indexing (`obj[idx]`), calling
+(`obj(arg1, arg2)`), iteration (`for x in obj`), arithmetic (`obj + obj2`) and comparison
+(`obj > obj2`), among other things. These operations convert all their arguments to `Py` and
+return `Py`.
+"""
+mutable struct Py
+    ptr::Ptr{Cvoid}
+    Py(::Val{:new}, ptr::Ptr{Cvoid}) = finalizer(Core.py_finalizer, new(ptr))
+end

src/Core/Py.jl

@@ -24,31 +24,13 @@ Get the underlying pointer from the Python object `x`.
 """
 getptr(x) = ispy(x) ? getptr(Py(x)::Py) : throw(MethodError(getptr, (x,)))
 
-"""
-    Py(x)
-
-Convert `x` to a Python object, of type `Py`.
-
-Conversion happens according to [these rules](@ref jl2py-conversion).
-
-Such an object supports attribute access (`obj.attr`), indexing (`obj[idx]`), calling
-(`obj(arg1, arg2)`), iteration (`for x in obj`), arithmetic (`obj + obj2`) and comparison
-(`obj > obj2`), among other things. These operations convert all their arguments to `Py` and
-return `Py`.
-"""
-mutable struct Py
-    ptr::C.PyPtr
-    Py(::Val{:new}, ptr::C.PyPtr) = finalizer(py_finalizer, new(ptr))
-end
-export Py
-
 py_finalizer(x::Py) = GC.enqueue(getptr(x))
 
 ispy(::Py) = true
-getptr(x::Py) = getfield(x, :ptr)
+getptr(x::Py) = C.PyPtr(getfield(x, :ptr))
 pyconvert(::Type{Py}, x::Py) = x
 
-setptr!(x::Py, ptr::C.PyPtr) = (setfield!(x, :ptr, ptr); x)
+setptr!(x::Py, ptr::C.PyPtr) = (setfield!(x, :ptr, Ptr{Cvoid}(ptr)); x)
 
 const PYNULL_CACHE = Py[]