add PyException to the API

Author: Christopher Doris

src/API/exports.jl

@@ -1,6 +1,7 @@
 # Core
 export Py
 export ispy
+export PyException
 export pyis
 export pyrepr
 export pyascii

src/API/types.jl

@@ -26,3 +26,15 @@ mutable struct Py
     ptr::Ptr{Cvoid}
     Py(::Val{:new}, ptr::Ptr{Cvoid}) = finalizer(Core.py_finalizer, new(ptr))
 end
+
+"""
+    PyException(x)
+
+Wraps the Python exception `x` as a Julia `Exception`.
+"""
+mutable struct PyException <: Exception
+    _t::Py
+    _v::Py
+    _b::Py
+    _isnormalized::Bool
+end

src/Core/Core.jl

@@ -31,6 +31,8 @@ using MacroTools: MacroTools, @capture
 using Markdown: Markdown
 
 import ..PythonCall:
+    Py,
+    PyException,
     pynew,
     pyisnull,
     pycopy!,

src/Core/err.jl

@@ -43,17 +43,6 @@ function errnormalize!(t::Py, v::Py, b::Py)
     (t, v, b)
 end
 
-"""
-    PyException(x)
-
-Wraps the Python exception `x` as a Julia `Exception`.
-"""
-mutable struct PyException <: Exception
-    _t::Py
-    _v::Py
-    _b::Py
-    _isnormalized::Bool
-end
 function PyException(v::Py = pybuiltins.None)
     if pyisnone(v)
         t = b = v
@@ -65,7 +54,6 @@ function PyException(v::Py = pybuiltins.None)
     end
     PyException(t, v, b, true)
 end
-export PyException
 
 ispy(x::PyException) = true
 Py(x::PyException) = x.v