enable i18n for the new error messages

2 files changed, 10 insertions, 8 deletions

diff --git a/TurtleArt/taexportpython.py b/TurtleArt/taexportpython.py
index 4688ea9..78a6592 100644
--- a/TurtleArt/taexportpython.py
+++ b/TurtleArt/taexportpython.py
@@ -21,6 +21,7 @@
 """ Python export tool """
 
 import ast
+from gettext import gettext as _
 from os import linesep
 import re
 import util.codegen as codegen
@@ -131,12 +132,13 @@ def _walk_action_stack(top_block, lc):
         prim = lc.get_prim_callable(block.primitive)
         # fail gracefully if primitive is not a Primitive object
         if not isinstance(prim, Primitive):
-            raise PyExportError("block is not exportable", block=block)
+            raise PyExportError(_("block is not exportable"), block=block)
         if prim.export_me:
             try:
                 new_ast = prim.get_ast(*arg_asts)
             except ValueError:
-                raise PyExportError("error while exporting block", block=block)
+                raise PyExportError(_("error while exporting block"),
+                                    block=block)
             if isinstance(new_ast, (list, tuple)):
                 ast_list.extend(new_ast)
             else:
diff --git a/TurtleArt/taprimitive.py b/TurtleArt/taprimitive.py
index 3d1feb3..b2d6683 100644
--- a/TurtleArt/taprimitive.py
+++ b/TurtleArt/taprimitive.py
@@ -267,18 +267,18 @@ class Primitive(object):
                 pos_value = new_arg_asts[0].n
                 return ast.Num(n=-pos_value)
             else:
-                raise PyExportError("minus sign (float.__neg__) got unexpected"
-                                    " arguments: " + repr(new_arg_asts) +
-                                    repr(new_kwarg_asts))
+                raise ValueError("minus sign (float.__neg__) got unexpected"
+                                 " arguments: " + repr(new_arg_asts) +
+                                 repr(new_kwarg_asts))
 
         # tuples
         elif self == Primitive.make_tuple:
             if not new_kwarg_asts:
                 return ast.Tuple(elts=new_arg_asts, ctx=ast.Load)
             else:
-                raise PyExportError("tuple constructor (Primitive.make_tuple) "
-                                    "got unexpected arguments: " +
-                                    repr(new_kwarg_asts))
+                raise ValueError("tuple constructor (Primitive.make_tuple) "
+                                 "got unexpected arguments: " +
+                                 repr(new_kwarg_asts))
 
         # group of Primitives
         elif self == Primitive.group: