add pybuiltins to the API

Author: Christopher Doris

src/API/exports.jl

@@ -2,6 +2,7 @@
 export Py
 export ispy
 export PyException
+export pybuiltins
 export pyis
 export pyrepr
 export pyascii

src/API/types.jl

@@ -38,3 +38,13 @@ mutable struct PyException <: Exception
     _b::Py
     _isnormalized::Bool
 end
+
+"""
+    pybuiltins
+
+An object whose fields are the Python builtins, of type [`Py`](@ref).
+
+For example `pybuiltins.None`, `pybuiltins.int`, `pybuiltins.ValueError`.
+"""
+baremodule pybuiltins
+end

src/Core/Core.jl

@@ -33,6 +33,7 @@ using Markdown: Markdown
 import ..PythonCall:
     Py,
     PyException,
+    pybuiltins,
     pynew,
     pyisnull,
     pycopy!,

src/Core/consts.jl

@@ -168,18 +168,10 @@ const BUILTINS = Set([
     :ResourceWarning,
 ])
 
-@eval baremodule pybuiltins
+# Populate the pybuiltins module imported from API
+@eval pybuiltins begin
 $([:(const $k = $pynew()) for k in BUILTINS]...)
 end
-"""
-    pybuiltins
-
-An object whose fields are the Python builtins, of type [`Py`](@ref).
-
-For example `pybuiltins.None`, `pybuiltins.int`, `pybuiltins.ValueError`.
-"""
-pybuiltins
-export pybuiltins
 
 for k in BUILTINS
     if k == :help