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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