clean up taprimitive and tatype

2 files changed, 6 insertions, 9 deletions

diff --git a/TurtleArt/taprimitive.py b/TurtleArt/taprimitive.py
index 05a44ad..2eb4a90 100644
--- a/TurtleArt/taprimitive.py
+++ b/TurtleArt/taprimitive.py
@@ -346,8 +346,8 @@ class Primitive(object):
                     condition_ast = ast.UnaryOp(op=ast.Not,
                                                 operand=pos_cond_ast)
                 else:
-                    raise ValueError("unknown loop controller: " +
-                                     repr(controller))
+                    raise PyExportError("unknown loop controller: " +
+                                        repr(controller))
                 loop_ast = ast.While(test=condition_ast,
                                      body=new_arg_asts[1],
                                      orelse=[])
@@ -619,7 +619,7 @@ class Primitive(object):
                     return wrapper
 
         # no controller found
-        raise ValueError("found no loop controller for " + repr(self))
+        raise PyExportError("found no loop controller for " + repr(self))
 
     @staticmethod
     def do_nothing():
@@ -976,8 +976,7 @@ class ArgSlot(object):
             raise error
         else:
             raise TATypeError(bad_value=bad_value, bad_type=old_type,
-                              req_type=new_type,
-                              message="filling slot " + repr(self))
+                              req_type=new_type)
 
 
 class ArgSlotDisjunction(Disjunction,ArgSlot):
@@ -1090,7 +1089,7 @@ def value_to_ast(value, *args_for_prim, **kwargs_for_prim):
         return get_call_ast('Media', args, return_type=TYPE_MEDIA)
     # unknown
     else:
-        raise ValueError("unknown type of raw value: " + repr(type(value)))
+        raise PyExportError("unknown type of raw value: " + repr(type(value)))
 
 
 def ast_yield_true():
diff --git a/TurtleArt/tatype.py b/TurtleArt/tatype.py
index 46c5921..78cbcc3 100644
--- a/TurtleArt/tatype.py
+++ b/TurtleArt/tatype.py
@@ -21,7 +21,6 @@
 """ type system for Primitives and their arguments """
 
 import ast
-from gettext import gettext as _
 
 from tablock import Media
 from taconstants import (Color, CONSTANTS)
@@ -43,8 +42,7 @@ class Type(object):
         if other is None:
             return False
         if not isinstance(other, Type):
-            raise TypeError("cannot compare Type to object of type " +
-                            repr(type(other)))
+            return False
         return self.value == other.value
 
     def __str__(self):