This is somehow related with this previous thread about raising ``TypeError`` on unsupported objects in Numexpr: http://www.mail-archive.com/numpy-discussion@lists.sourceforge.net/msg03146.html
There is still a case where unsupported objects can get into expressions without Numexpr noticing. For instance: >>> import numexpr >>> numexpr.evaluate('[]') Traceback (most recent call last): File "<stdin>", line 1, in ? File "numexpr/compiler.py", line 594, in evaluate _names_cache[expr_key] = getExprNames(ex, context) File "numexpr/compiler.py", line 570, in getExprNames ast = expressionToAST(ex) File "numexpr/compiler.py", line 84, in expressionToAST this_ast = ASTNode(ex.astType, ex.astKind, ex.value, AttributeError: 'list' object has no attribute 'astType' The attached patch makes the error clearer and more consistent with the error added in the aforementioned thread: >>> import numpy >>> import numexpr >>> numexpr.evaluate('[]') Traceback (most recent call last): File "<stdin>", line 1, in ? File "numexpr/compiler.py", line 596, in evaluate _names_cache[expr_key] = getExprNames(ex, context) File "numexpr/compiler.py", line 571, in getExprNames ex = stringToExpression(text, {}, context) File "numexpr/compiler.py", line 229, in stringToExpression raise TypeError("unsupported expression type: %s" % type(ex)) TypeError: unsupported expression type: <type 'list'> Though I admit it may be strange for this error to be triggered. (I had a little mess with using ``expressions.ExpressionNode`` instead of ``expr.ExpressionNode``... I still don't see why the private copy of the module is necessary.) :: Ivan Vilata i Balaguer >qo< http://www.carabos.com/ Cárabos Coop. V. V V Enjoy Data ""
Index: compiler.py =================================================================== --- compiler.py (revisión: 2307) +++ compiler.py (copia de trabajo) @@ -225,6 +225,8 @@ ex = eval(c, names) if expressions.isConstant(ex): ex = expr.ConstantNode(ex, expressions.getKind(ex)) + elif not isinstance(ex, expr.ExpressionNode): + raise TypeError("unsupported expression type: %s" % type(ex)) return ex
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